WO2004016837A1 - 酸化ガリウム鉄混晶の結晶製造方法 - Google Patents
酸化ガリウム鉄混晶の結晶製造方法 Download PDFInfo
- Publication number
- WO2004016837A1 WO2004016837A1 PCT/JP2002/010601 JP0210601W WO2004016837A1 WO 2004016837 A1 WO2004016837 A1 WO 2004016837A1 JP 0210601 W JP0210601 W JP 0210601W WO 2004016837 A1 WO2004016837 A1 WO 2004016837A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crystal
- orthorhombic
- producing
- atmosphere
- iron oxide
- Prior art date
Links
- 239000013078 crystal Substances 0.000 title claims abstract description 170
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 11
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 title abstract 3
- 229910052733 gallium Inorganic materials 0.000 title abstract 3
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims description 27
- 230000008018 melting Effects 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- JSUIEZRQVIVAMP-UHFFFAOYSA-N gallium iron Chemical compound [Fe].[Ga] JSUIEZRQVIVAMP-UHFFFAOYSA-N 0.000 claims description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 abstract description 7
- 230000005690 magnetoelectric effect Effects 0.000 abstract description 6
- 238000004857 zone melting Methods 0.000 abstract description 6
- 230000005291 magnetic effect Effects 0.000 description 15
- 238000002441 X-ray diffraction Methods 0.000 description 9
- 238000007716 flux method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 239000010453 quartz Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 4
- 125000004430 oxygen atom Chemical group O* 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 238000005162 X-ray Laue diffraction Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000002109 crystal growth method Methods 0.000 description 2
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 2
- 230000005293 ferrimagnetic effect Effects 0.000 description 2
- 230000005307 ferromagnetism Effects 0.000 description 2
- 229910001195 gallium oxide Inorganic materials 0.000 description 2
- 229910000953 kanthal Inorganic materials 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005308 ferrimagnetism Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000001683 neutron diffraction Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009702 powder compression Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/16—Oxides
- C30B29/22—Complex oxides
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
- C30B13/16—Heating of the molten zone
- C30B13/22—Heating of the molten zone by irradiation or electric discharge
Definitions
- the present invention Sani ⁇ gallium iron mixed crystal which allows Succoth read out spin information embedded by utilizing the magneto-electric effect in solids - the method of crystal manufacturing (Ga 2 x F e x 0 3) It is about. Background art
- Ga 2 0 3, F e 2 0 3, B 2 0 3, the B i 2 0 3 is appropriate amount, the 1 125 ° ⁇ Among 8 2 0 3, B i 2 Os in molten liquid Hold for 5 hours, then cool at 4-7 ° C / Hr to obtain crystals.
- the crystal obtained here is a small crystal with a diameter of about 1 mm [Elizabeth A. Wood; Acta Cryst. 13, 682 (I960)].
- the present inventors were able to obtain crystals by the flux method following IS Jacos, but the obtained crystals were small as described above, and not only crystals with a diameter of several mni could not be obtained. It turned out to have such problems. That is, in the G a 2- x F e x 0 3 manufacturing method of a crystalline described above, usually, the mixing ratio of Ga 2 0 3 and F e 2 0 3 as the starting material, G a 2 one x F e x 0 Determine the target Fe composition (X) of 3 .
- composition (X) of Fe in the microcrystals actually obtained by the above flux method deviated from the expected composition.
- ICP high-frequency plasma emission
- the G a 2-XF e x 0 3 crystals are the production by the flux method, not small only been made in intolerable crystals to industrial applications in terms of quality of the crystal. Disclosure of the invention
- the conventional Ga 2 - The problem of the flux method is a manufacturing method of XF ⁇ ⁇ 0 3 crystals
- the crystal size is about 1 mm.
- the obtained crystal is not a single crystal but often has two or more different orientations in a single crystal grain, and a twin structure is often found.
- An object of the present invention is to provide a method for producing a crystal of gallium iron oxide mixed crystal from which a high-quality, uniform and large crystal can be obtained in view of the above situation.
- x ⁇ 1 is under a high pressure atmosphere of more than 3 atmospheres, G a 2 - and forming a single crystal x F e x O s orthorhombic crystal structure.
- FIG. 1 is a schematic view of a floating melting zone type lamp heating furnace showing an embodiment of the present invention.
- FIG. 2 G a 2 by floating ⁇ band scheme illustrating an embodiment of the present invention - is an illustration of XF e x O s crystal growth method.
- FIG. 6 is a diagram showing a Lae pattern of a crystal produced by the floating zone method according to the present invention and a conventional flux method.
- FIG. 7 is a diagram showing the atomic arrangement of the crystal structure according to the floating melting zone method according to the present invention.
- FIG. 8 is a diagram showing the Fe composition dependency of the ferrimagnetic transition temperature Tc.
- FIG. 1 schematically shows a lamp heating furnace of a floating zone melting method used for manufacturing the crystal, Fig. 2 G a by the floating zone melting method 2- XF e x O
- FIG. 3 is an explanatory view of a method for growing three crystals. Here we show a confocal lamp heating furnace located on both sides.
- 1 is Ga 2 - is X F e x 0 3 transparent quartz tube crystal as a sample chamber one of growing, on its transparent quartz tube 1, Kanthal line from the top of the stainless steel sheet Yafuto 9
- the upper sample rod (one feeder) 3 suspended by 2 and the lower sample rod (seed crystal: seed) 5 supported on the lower stainless steel shaft 10 supported by the cantilever wire 4 are rotatable. Have been.
- the inside of the transparent quartz tube 1 is set in an oxygen atmosphere, but even in an air atmosphere or an inert gas atmosphere. Good.
- Reference numerals 6 and 7 denote heat sources (here, halogen lamps) arranged on both sides of the lamp heating furnace of the transparent quartz tube 1, and 8 denotes a floating melting zone.
- G a 2 as the starting material - to 2 minutes work made by solid bars by compression molding a powder sample of the x F ex 0 3, as a feeder one 3 and the seed 5, in FIG. 2
- (a) Attach to both sides of upper and lower stainless steel shafts 9 and 10 in quartz tube 1 as shown.
- the sample rod (feeder 1) 3 on the upper part is suspended vertically from the tip of the stainless steel shaft 9 on the upper side by the wire 2.
- the lower sample rod (seed) 5 is also fixed to the stainless steel shaft 10 with the Kanthal wire 4.
- the axes of the upper and lower sample rods 3 and 5 are fixed as accurately as possible to coincide with the central axes of the upper and lower stainless steel shafts 9 and 10. Rotate 0 in opposite directions.
- the heat sources (halogen lamps) 6, 7 are turned on in an oxygen atmosphere.
- the bright spot images of the halogen lamps 6 and 7 are applied to the lower end of the upper sample bar (feeder 1) 3, and the image of the tip of the rotating upper sample bar 3 is observed from the observation window (not shown).
- the lighting current of the halogen lamps 6 and 7 is increased, the lower end of the sample rod 3 at the upper portion is melted.
- the floating melting zone 8 thus formed exists between the lower sample rod 5 and the upper sample rod 3 in a stable state if attention is paid to the following points.
- the roasting section starting from the tip of the lower sample rod 5 moves upward in the upper sample rod 3.
- a suitable high-temperature melting zone keeps the floating melting zone on the center axis of the shaft 9,10. That is, in order to make the temperature uniform, it must be maintained between both ends of the upper and lower sample rods 3, 5 rotating in opposite directions.
- the roasting section requires a moderate fluidity and viscosity of the sample. Adjust the distance between the upper edge and the descent speed.
- the melting part is thinned by evaporation, it is necessary to replenish the loss by making the descent speed of the upper sample rod 3 higher than that of the lower sample rod 5 accordingly.
- the crystal growth direction obtained in this way does not always coincide with the central axis of the lower part of the shaft. Therefore, the obtained single crystal is used as a sample rod 5, and a solid bar formed by powder compression molding is fixed to a feeder 13 to grow a single crystal. At this time, the growth axis of the single crystal must be fixed so as to coincide with the central axis of the lower part of the shaft. By doing so, single crystals of several c c1 or more can be stably manufactured for the first time.
- This floating melting zone method (floating melting zone method) is an excellent method in that the melting zone can be formed without a crucible, so that contamination of impurities from the crucible can be eliminated. This method makes it possible to produce crystals of a size necessary for practical use.
- FIGS. 4 and 5 The X-ray diffraction patterns of the crystals under such pressure are shown in FIGS. 4 and 5.
- sample rod feed rate 1. 5 ⁇ 2 Omm / Hr and the floating melting zone (the upper limit is 20 mn / H r) is larger sample bar feed speed becomes unstable, again F e 3 0 4, etc. Generates a crystal structure.
- the upper limit is desirably 20mmZHr.
- the Laue pattern of the crystal by the floating melting zone method is observed as a single point, while as shown in Fig. 6 (b), Laue patterns of flux crystals are observed at multiple points.
- the ray pattern of this flux crystal is observed as a different pattern when X-rays are irradiated to different portions of the flux crystal, so that the flux crystal is clearly not a single crystal but a twin crystal. I understand that there is.
- FIG. 7 shows the results of X-ray analysis of these crystals.
- FIG. 7 shows the atomic arrangement of these crystal structures as viewed from the ab plane.
- Ga 1 is surrounded by tetrahedrons composed of oxygen atoms.
- G a 2 is surrounded by an octahedron composed of oxygen atoms.
- F e l and F e 2 have a structure surrounded by an octahedron composed of oxygen atoms.
- the magnetic properties of this crystal play a central role in the electron spin exchange interaction through Fe 1 and Fe 2 oxygen atoms.
- the F e 3 spin and the F e 4 spin are in opposite directions and almost oriented toward the a-axis. It has been found that these spins exhibit weak ferromagnetism by tilting slightly to the c-axis.
- FIG. 8 is a diagram showing the dependence of the ferrimagnetic transition temperature Tc on the Fe composition.
- ⁇ is based on the floating melting zone method of the present invention, and the garden is based on the conventional flux method.
- the crystal manufacturing apparatus of the floating zone melting method Ga 2 - XF e x 0 3 orthorhombic Akirayui can be produced crystals, also floating zone melting method form forming the floating melting zone without crucible Therefore, contamination of impurities from the crucible can be eliminated. According to this method, it is possible to produce a crystal having a size necessary for practical use.
- Trigonal (rh omb ohedral) structures (G a 2 O 3 crystal and F e 2 O 3 crystal is a crystal structure having a trigonal structure) or F e 3 0 4 (Cu bic ; Ma gnetite) is mixed crystals
- the magnetized material since the magnetized material has magnetization, it can be determined from the fact that the produced crystal easily adheres to the magnet at room temperature.
- G a in 2 _x F e x 0 3 crystal by adjusting the crystal growth rate below 10 mm / H r, by crystal manufacturing, trigonal (rh omb ohedral) structure and F e 3 0 Crystal growth having a 4 (cubic; magnetite) structure can be stably suppressed.
- Trigonal (rh omb ohedral) structure or F e 3 0 4; whether crystals (Cub ic Ma gnetite) is mixed, is the same over the crystals produced can be readily determined by whether attached to the magnet.
- a crystal material as a material having a magnetoelectric effect, which is a central portion of a magnetic sensor element, capable of reading spin information embedded in a solid.
- a sensor that detects minute magnetism with high sensitivity using the magnetoelectric effect. This can be applied as a high-sensitivity magnetic sensor built into a magnetic head.
- the present invention is not limited to the above-described embodiment, but based on the gist of the present invention. Various modifications are possible, and these are not excluded from the scope of the present invention. As described above, according to the present invention, the following effects can be obtained.
- G a 2 - single crystal X F ex 0 3 of orthorhombic crystals are obtained with a size of several mm. This size is determined by the structure of the floating melting zone lamp heating furnace. When provided as a magnetic sensor element, it is necessary to cut out the crystal in an appropriate direction. However, once the crystal orientation is determined, the crystal orientation can be easily determined thereafter.
- the magnetic field can be detected without using the conventional coil shape, and the magnetic sensor can be miniaturized.
- a magnetic sensor that can withstand the appearance can be provided.
- This effort is a method of manufacturing a crystalline material that is a central part of a magnetic sensor element that enables reading of spin information embedded in a solid. It can be used as a sensor to detect minute magnetism.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02807688A EP1447464A4 (en) | 2002-08-12 | 2002-10-11 | PROCESS FOR THE PRODUCTION OF A MIXED CRYSTAL GALLIUM IRON OXIDE |
US10/494,357 US6966946B2 (en) | 2002-08-12 | 2002-10-11 | Crystal production method for gallium oxide-iron mixed crystal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-234708 | 2002-08-12 | ||
JP2002234708A JP3822150B2 (ja) | 2002-08-12 | 2002-08-12 | 酸化ガリウム鉄混晶の結晶製造方法 |
Publications (1)
Publication Number | Publication Date |
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WO2004016837A1 true WO2004016837A1 (ja) | 2004-02-26 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/010601 WO2004016837A1 (ja) | 2002-08-12 | 2002-10-11 | 酸化ガリウム鉄混晶の結晶製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US6966946B2 (ja) |
EP (1) | EP1447464A4 (ja) |
JP (1) | JP3822150B2 (ja) |
KR (1) | KR100702381B1 (ja) |
WO (1) | WO2004016837A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007191365A (ja) * | 2006-01-20 | 2007-08-02 | Japan Science & Technology Agency | 単結晶製造装置及びそれを用いた高圧単結晶製造方法 |
JP5536920B1 (ja) | 2013-03-04 | 2014-07-02 | 株式会社タムラ製作所 | Ga2O3系単結晶基板、及びその製造方法 |
CN111394793A (zh) * | 2020-03-19 | 2020-07-10 | 中国科学院上海硅酸盐研究所 | 室温块状多铁单晶及其制备方法 |
JP7247945B2 (ja) * | 2020-04-24 | 2023-03-29 | トヨタ自動車株式会社 | 酸化ガリウム系半導体及びその製造方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6165263A (en) * | 1998-03-25 | 2000-12-26 | Murata Manufacturing Co., Ltd. | Method for growing single crystal |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6046080B2 (ja) * | 1981-07-16 | 1985-10-14 | 富士電気化学株式会社 | マイクロ波用ガリウム置換型yig単結晶の製造方法 |
US5976247A (en) * | 1995-06-14 | 1999-11-02 | Memc Electronic Materials, Inc. | Surface-treated crucibles for improved zero dislocation performance |
JP3237564B2 (ja) * | 1997-03-12 | 2001-12-10 | 株式会社村田製作所 | 単結晶育成方法 |
-
2002
- 2002-08-12 JP JP2002234708A patent/JP3822150B2/ja not_active Expired - Fee Related
- 2002-10-11 KR KR1020047011915A patent/KR100702381B1/ko not_active IP Right Cessation
- 2002-10-11 EP EP02807688A patent/EP1447464A4/en not_active Withdrawn
- 2002-10-11 WO PCT/JP2002/010601 patent/WO2004016837A1/ja active Application Filing
- 2002-10-11 US US10/494,357 patent/US6966946B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6165263A (en) * | 1998-03-25 | 2000-12-26 | Murata Manufacturing Co., Ltd. | Method for growing single crystal |
Non-Patent Citations (1)
Title |
---|
POPOV YU. F. ET AL.: "Linear magnetostriction and magnetoelectric effect in piezoelectric Ga2-xFexO3", FERROELECTRICS, vol. 204, no. 1-4, 1997, pages 269 - 277, XP002975340 * |
Also Published As
Publication number | Publication date |
---|---|
US6966946B2 (en) | 2005-11-22 |
KR20050030621A (ko) | 2005-03-30 |
EP1447464A1 (en) | 2004-08-18 |
US20040255844A1 (en) | 2004-12-23 |
EP1447464A4 (en) | 2007-03-14 |
JP2004075414A (ja) | 2004-03-11 |
KR100702381B1 (ko) | 2007-04-02 |
JP3822150B2 (ja) | 2006-09-13 |
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