GB1294272A - Method of making orthoferrite single crystals - Google Patents

Method of making orthoferrite single crystals

Info

Publication number
GB1294272A
GB1294272A GB695/71A GB69571A GB1294272A GB 1294272 A GB1294272 A GB 1294272A GB 695/71 A GB695/71 A GB 695/71A GB 69571 A GB69571 A GB 69571A GB 1294272 A GB1294272 A GB 1294272A
Authority
GB
United Kingdom
Prior art keywords
orthoferrite
single crystals
making
oxygen
proportions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB695/71A
Inventor
Hiroshi Makino
Susumu Nakamura
Takashi Okada
Koichi Matsumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Publication of GB1294272A publication Critical patent/GB1294272A/en
Expired legal-status Critical Current

Links

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
    • C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
    • 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
    • C30B29/24—Complex oxides with formula AMeO3, wherein A is a rare earth metal and Me is Fe, Ga, Sc, Cr, Co or Al, e.g. ortho ferrites

Landscapes

  • 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)

Abstract

1294272 Zone-melting NIPPON ELECTRIC CO Ltd 6 Jan 1971 [5 Aug 1970] 695/71 Heading BIS While growing orthoferrite single crystals, by the floating zone-melting method, the formation of gas bubbles and pores, caused by slight variation from the stoichiometric proportions of Fe 2 O 3 to R 2 O 3 , (where R is En, Tb, Y or Yb), is counteracted by operating in an atmosphere of oxygen at a pressure of from 1 to 10 Atmospheres. The polycrystalline orthoferrite feed rod is produced by conventional methods and fused to a seed crystal, for growth generally parallel to the c-axis. The greater the deviation from stoichrometric proportions, the greater the oxygen pressure required. A small proportion of the Fe 2 O 3 , may be replaced by Co 2 O 3 or a combination of CoO and TiO 2 .
GB695/71A 1970-08-05 1971-01-06 Method of making orthoferrite single crystals Expired GB1294272A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6798370 1970-08-05

Publications (1)

Publication Number Publication Date
GB1294272A true GB1294272A (en) 1972-10-25

Family

ID=13360712

Family Applications (1)

Application Number Title Priority Date Filing Date
GB695/71A Expired GB1294272A (en) 1970-08-05 1971-01-06 Method of making orthoferrite single crystals

Country Status (3)

Country Link
US (1) US3748271A (en)
DE (1) DE2100584A1 (en)
GB (1) GB1294272A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55130898A (en) * 1979-04-02 1980-10-11 Hitachi Ltd Preparation of ferrite single crystal
JPS5954690A (en) * 1982-09-18 1984-03-29 Sony Corp Method for crystal growth
CN103993348B (en) * 2014-05-09 2016-05-25 上海大学 The growing method of rare earth orthoferrite monocrystalline and application

Also Published As

Publication number Publication date
US3748271A (en) 1973-07-24
DE2100584A1 (en) 1972-02-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees