JPH01134741A - Information recording medium - Google Patents
Information recording mediumInfo
- Publication number
- JPH01134741A JPH01134741A JP29230187A JP29230187A JPH01134741A JP H01134741 A JPH01134741 A JP H01134741A JP 29230187 A JP29230187 A JP 29230187A JP 29230187 A JP29230187 A JP 29230187A JP H01134741 A JPH01134741 A JP H01134741A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- information
- magnetic field
- superconducting material
- laser light
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 13
- 230000010287 polarization Effects 0.000 abstract description 8
- 230000007704 transition Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は超電導材料を記録媒体に用い、磁気光学効果を
利用して情報の記録再生を行うことができる記録媒体に
関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a recording medium that uses a superconducting material and is capable of recording and reproducing information using magneto-optical effects.
従来の技術
近年、超電導材料の開発には目ざましいものがあり、Ｎ
ｂＴｉ 、Ｗｂ３Ｓｎなどの合金に加え、Ｌａ５ｒＣｕ
Ｏ。Conventional technology In recent years, there have been remarkable developments in superconducting materials, and N
In addition to alloys such as bTi and Wb3Sn, La5rCu
O.
ＹＢａＣｕＯ等のセラミックス材料が開発されている。Ceramic materials such as YBaCuO have been developed.
特に、セラミックス超電導材料では、液体窒素温度７７
に以上の比較的高温で超電導状態が生じることが知られ
ている。このため、従来からの超電導材料を用いた超電
導コイル、ジョセフノン素子のほかに超電導電力貯蔵シ
ステム、超電導送電等への応用も進められており、種々
の適用分野がある０
発明が解決しようとする問題点
しかしながら、従来の技術では、超電導材料を記録媒体
として用い、磁気光学効果を利用して情報の記録再生を
行なうものに関しては開示していない。In particular, in ceramic superconducting materials, the liquid nitrogen temperature is 77
It is known that a superconducting state occurs at relatively high temperatures above . For this reason, in addition to conventional superconducting coils and Josephnon elements using superconducting materials, applications are also progressing to superconducting power storage systems, superconducting power transmission, etc., and there are various fields of application. Problems However, the prior art does not disclose anything that uses a superconducting material as a recording medium and uses magneto-optic effects to record and reproduce information.
本発明は、超電導材料を用い、磁気光学効果を利用して
情報の記録再生を行なうことができる情報記録媒体を提
供するものである。The present invention provides an information recording medium that uses a superconducting material and is capable of recording and reproducing information by utilizing the magneto-optic effect.
問題点を解決するための手段
この目的を達成するために、本発明の情報記録媒体は、
筒状に形成され、かつ超電導材料で形成された記録媒体
を有し、磁気光学効果を利用して情報の記録再生が可能
なように構成されている。Means for Solving the Problems To achieve this objective, the information recording medium of the present invention includes:
It has a recording medium formed in a cylindrical shape and made of a superconducting material, and is configured to be able to record and reproduce information using the magneto-optical effect.
作用
この構成によって、筒状の記録媒体に流す電流の向きを
変えることによって情報の記録を行なうことができ、前
記記録媒体に流ｎる電流によって生ずる磁界にレーザ光
を照射し、磁気光学効果によって回転する偏光面全検出
することによって情報の再生を行なう、ことができるた
め、書換え可能で安定した情報記録媒体を実現できる０
実施例
以下本発明の一実施例について、図面を参照しながら説
明する。Function: With this configuration, information can be recorded by changing the direction of the current flowing through the cylindrical recording medium, and by irradiating the magnetic field generated by the current flowing through the recording medium with a laser beam, the magneto-optical effect is used to record information. Since information can be reproduced by detecting the entire rotating plane of polarization, a rewritable and stable information recording medium can be realized.
EXAMPLE An example of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例における情報記録媒体の概要
を示すものである。第１図において、１は超電導材料を
用いた円筒状の記録媒体、２は記録媒体１上を流れる電
流、３は記録媒体１に流れる電流２によって生じる磁界
、４はレーザ光源、６はレーザ光源４からのレーザ光、
６はレーザ光６を記録媒体１に照射する集光レンズ、７
は記録媒体１により偏光したレーザ光の偏光面の検出器
である。FIG. 1 shows an outline of an information recording medium in an embodiment of the present invention. In FIG. 1, 1 is a cylindrical recording medium using a superconducting material, 2 is a current flowing on the recording medium 1, 3 is a magnetic field generated by the current 2 flowing through the recording medium 1, 4 is a laser light source, and 6 is a laser light source Laser light from 4,
6 is a condensing lens that irradiates the recording medium 1 with the laser beam 6;
is a detector for the polarization plane of the laser beam polarized by the recording medium 1.
また、第２図は本実施例の情報記録媒体の記録方法を示
した図である。第２図において、８は情報を記録する時
に印加する外部磁界である。Further, FIG. 2 is a diagram showing the recording method of the information recording medium of this embodiment. In FIG. 2, 8 is an external magnetic field applied when recording information.
以上のように、構成された本実施例の情報記録媒体につ
いて、その記録再生方法を説明する。まず、第２図ａに
示すように高出力レーザ光を照射して記録媒体１の温度
を超電導転移温度Ｔｃより高温の常電導状態で外部磁界
８を印加する。次に第２図すに示すように高出力レーザ
光の照射をやめ記録媒体１の温度を超電導転移温度Ｔｃ
以下に下げたあと、外部磁界８を取り除く。この時、記
録媒体１は超電導材料を用いているため、円筒状に形成
された記録媒体１に永久に電流２が流れ、この電流によ
って磁界３が生ずる。磁界３の向きは、外部磁界８を印
加する方向に依存するため、外部磁界８の方向を変化さ
せることにより記録媒体１中に生ずる磁界３の向きを変
化させ、このことによって情報の記録を行なうことがで
きる。The recording and reproducing method for the information recording medium of this embodiment configured as described above will be explained. First, as shown in FIG. 2a, a high-power laser beam is irradiated to maintain the temperature of the recording medium 1 in a normal conduction state higher than the superconducting transition temperature Tc, and an external magnetic field 8 is applied. Next, as shown in Figure 2, the high-power laser beam irradiation is stopped and the temperature of the recording medium 1 is lowered to the superconducting transition temperature Tc.
After lowering the magnetic field to below, the external magnetic field 8 is removed. At this time, since the recording medium 1 uses a superconducting material, a current 2 permanently flows through the cylindrical recording medium 1, and a magnetic field 3 is generated by this current. Since the direction of the magnetic field 3 depends on the direction in which the external magnetic field 8 is applied, changing the direction of the external magnetic field 8 changes the direction of the magnetic field 3 generated in the recording medium 1, thereby recording information. be able to.
次に、情報の再生について第１図を用いて説明する。第
２図の方法で記録した記録媒体１の磁界３に、レーザ光
源４からの偏光面のそろったレーザ光６を集光レンズ６
により集光し照射する。この時、レーザ光６は磁界３と
の磁気光学効果により偏光面が回転する。磁界３の向き
が逆転すると偏光面も逆方向に回転するので、この偏光
面の回転を検出器７で検出することにより、情報の再生
を行なうことができる。Next, information reproduction will be explained using FIG. 1. A laser beam 6 with a uniform polarization plane from a laser light source 4 is applied to the magnetic field 3 of the recording medium 1 recorded by the method shown in FIG.
The light is focused and irradiated. At this time, the plane of polarization of the laser beam 6 is rotated due to the magneto-optic effect with the magnetic field 3. When the direction of the magnetic field 3 is reversed, the plane of polarization also rotates in the opposite direction, and by detecting this rotation of the plane of polarization with the detector 7, information can be reproduced.
また、情報の消去は、第２図１のように記録媒体１の温
度を超電導転移点Ｔｃより高温にした時に外部磁界８を
印加しなければ、記録媒体１の温度がＴｃ以下になった
時にも電流２が流れず情報の消去ができる。In addition, information can be erased when the temperature of the recording medium 1 becomes lower than Tc unless the external magnetic field 8 is applied when the temperature of the recording medium 1 becomes higher than the superconducting transition point Tc as shown in FIG. Also, current 2 does not flow and information can be erased.
以上のように本実施例によれば、超電導材料を円筒状に
形成した記録媒体１を用い、磁気光学効果を利用して情
報の記録再生を行うことにより、書換え可能で安定した
記録媒体１を実現できる０なお、本発明の実施例では記
録媒体１のみを示したが、この記録媒体１は基板、又は
フィルム上に形成されているものである。As described above, according to this embodiment, a rewritable and stable recording medium 1 is obtained by using the recording medium 1 formed of a cylindrical superconducting material and recording and reproducing information using the magneto-optic effect. In the embodiment of the present invention, only the recording medium 1 is shown, but this recording medium 1 is formed on a substrate or a film.
また、記録媒体１の形状は円筒状としたが、多角形の筒
状に形成したものでもよい。Further, although the recording medium 1 is cylindrical in shape, it may be formed in a polygonal cylindrical shape.
さらに、本発明の実施例では示していないが、円筒状又
は多角形の筒状の内部には空気又は絶縁体が満たされて
いるものとする。Further, although not shown in the embodiments of the present invention, it is assumed that the inside of the cylindrical or polygonal tube is filled with air or an insulator.
発明の効果
本発明は、超電導材料を筒状に形成した記録媒体を用い
ることにより、磁気光学効果を利用して情報の記録再生
を行うことができ、書き換え可能で安定した情報記録媒
体を実現できる。さらに、永久電流中の磁界とレーザ光
との磁気光学効果を恢出するため、優れた信号品質の情
報記録媒体を実現できるものである。Effects of the Invention By using a recording medium made of a cylindrical superconducting material, the present invention can record and reproduce information using the magneto-optical effect, and can realize a rewritable and stable information recording medium. . Furthermore, since the magneto-optical effect of the magnetic field in the persistent current and the laser beam is exploited, an information recording medium with excellent signal quality can be realized.
第１図は本発明の一実施例における情報記録媒体の構成
を示す概略図、第２図は同情報記録媒体の記録時の概略
図である。
１・・・・・・記録媒体、２・・・・・・電流、３・・
・・・・磁界、４・・・・・・レーザ光源、５・・・・
・・レーザ光、６・・・・・・集光レンズ、７・・・・
・・検出器、８・・・・・・外部磁界。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名／−
−一記錘甥イ本
２−−一電５ノ民−
第 １ 口 ３−櫨界４− レープ
゛光源、
Ｓ−レープ光
第２図FIG. 1 is a schematic diagram showing the configuration of an information recording medium in an embodiment of the present invention, and FIG. 2 is a schematic diagram showing the information recording medium during recording. 1...recording medium, 2...current, 3...
...Magnetic field, 4...Laser light source, 5...
... Laser light, 6... Condensing lens, 7...
...Detector, 8...External magnetic field. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
-Ikki Ame Nephew Book 2--Iden 5 nomin- Part 1 3-Kashikai 4-Reb light source, S-Reb light Figure 2
Claims (1)
を有し、磁気光学効果を利用して情報の記録再生が可能
なように構成されたことを特徴とする情報記録媒体。What is claimed is: 1. An information recording medium comprising a recording medium formed in a cylindrical shape and made of a superconducting material, and configured to be capable of recording and reproducing information using magneto-optical effects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29230187A JPH01134741A (en) | 1987-11-19 | 1987-11-19 | Information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29230187A JPH01134741A (en) | 1987-11-19 | 1987-11-19 | Information recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01134741A true JPH01134741A (en) | 1989-05-26 |
Family
ID=17779986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29230187A Pending JPH01134741A (en) | 1987-11-19 | 1987-11-19 | Information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01134741A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01178118A (en) * | 1988-01-08 | 1989-07-14 | Canon Inc | Magnetic recording medium |
| US6085729A (en) * | 1997-12-10 | 2000-07-11 | Denso Corporation | Fuel injection control for engines responsive to fuel injection timing |
-
1987
- 1987-11-19 JP JP29230187A patent/JPH01134741A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01178118A (en) * | 1988-01-08 | 1989-07-14 | Canon Inc | Magnetic recording medium |
| US6085729A (en) * | 1997-12-10 | 2000-07-11 | Denso Corporation | Fuel injection control for engines responsive to fuel injection timing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0448406A (en) | Magneto-optical recording and reproducing device and magnetic head | |
| JPH01134741A (en) | Information recording medium | |
| JPS5954003A (en) | Thermomagnetic recorder | |
| Treves et al. | Laser‐Beam Recording on a Magnetic Film | |
| JPS61214266A (en) | Photomagnetic recording and reproducing device | |
| Kaneko et al. | IRISTER/spl minus/magneto-optical disk for magnetically induced SuperResolution | |
| JPS605404A (en) | Opto-magnetic recording and reproducing system | |
| KR920001459A (en) | Magneto-optical recording and reproducing method and magneto-optical recording and reproducing apparatus | |
| JPS6111977A (en) | Optomagnetic recording body | |
| JPH0636376A (en) | Device and method for improving long-term stability of exchange coupling optical type medium | |
| JPS61182651A (en) | Photomagnetic recording medium | |
| JPH02156450A (en) | Magneto-optical recorder | |
| JP2641049B2 (en) | Optical information recording medium and recording method thereof | |
| JPH0231356A (en) | Information recording and reproducing device | |
| JPH0386954A (en) | Magneto-optical recorder | |
| JPH01182949A (en) | Magneto-optical recording method for superconducting material | |
| JPS62128034A (en) | Optical head for photomagnetic disc | |
| JPH04102203A (en) | Recording method and its reproducing method | |
| JPH01173460A (en) | Method and device for superconducting multilevel recording and reproducing | |
| JPH01162258A (en) | Magneto-optical recorder | |
| JPH01173401A (en) | Erasing device for high coercive force vertical magnetic recording medium | |
| JPS61273762A (en) | Photomagnetic disk | |
| JPS6258441A (en) | Photomagnetic recording and reproducing device | |
| JPS63222354A (en) | Magneto-optical recorder | |
| JPH01171137A (en) | Magneto-optical recording medium |