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1. 发明专利

JPH06295818A MULTILAYER MAGNETORESISTIVE EFFECT FILM AND MAGNETIC HEAD 失效
公开(公告)号：JPH06295818A
公开(公告)日：1994-10-21
申请号：JP8293493
申请日：1993-04-09
申请人： UNIV NAGOYA , HITACHI LTD
发明人： UCHIYAMA SUSUMU , TSUNASHIMA SHIGERU , KANDA TATSUYA , JINBO MUTSUKO , NAKATANI RYOICHI , SUGITA KEN
IPC分类号： G11B5/39 , H01F10/12 , H01F10/32 , H01L43/08
摘要： PURPOSE:To provide a method for improving the saturation field in a multilayer magnetoresistive effect film employing a magnetic layer having face-centered cubic structure by employing a material having a face-centered lattice structure at a part of the magnetic layer with the (111) face of a crystal being oriented in parallel with the substrate. CONSTITUTION:In order to increase the magnetoresistive variation rate of a multilayer magnetoresistive effect film, (111) face of the crystal in a magnetic layer 11 having a face-centered structure is oriented in parallel with a substrate 14. Consequently, the exchange interaction between the magnetic layers 11 is weakened thus lowering the saturation field. The direction of magnetization is controlled by varying the direction of magnetic anisotropy for each magnetic layer 11, by employing two different types of magnetic layers 11, or by applying an exchange bias field from an antiferromagnetic layer to the magnetic layer 11. Consequently, a low saturation field is obtained.

2. 发明专利

JPH0799113A MAGNETORESISTANCE EFFECT MULTILAYER FILM AND MAGNETIC HEAD 失效
公开(公告)号：JPH0799113A
公开(公告)日：1995-04-11
申请号：JP24237993
申请日：1993-09-29
申请人： UNIV NAGOYA , HITACHI LTD
发明人： UCHIYAMA SUSUMU , TSUNASHIMA SHIGERU , KANDA TATSUYA , JINBO MUTSUKO , NAKATANI RYOICHI , SUGITA KEN
IPC分类号： G01R33/09 , G11B5/39 , H01F10/08 , H01F10/32 , H01L43/08
摘要： PURPOSE:To obtain high magntoresistance effect by specifying the relation between the X-ray diffraction strength I200 and I111 of crystal faces, using the magnetic material having the face-centered cubic lattice structure of Ni-Fe-Co or Ni-Fe alloy or the like as a magnetic layer. CONSTITUTION:In a magnetoresistance effect element using a multilayer film where nonmagnetic layers 12 are stacked, the relation between the X-ray diffraction strength I200 by the crystal face (200) and the X-ray diffraction strength I111 by the crystal face (111) of the magnetic layer 11 is made such that 0.2

3. 发明专利

JPH06260337A MULTILAYER MAGNETORESISTANCE EFFECT FILM AND MAGNETIC HEAD 失效
公开(公告)号：JPH06260337A
公开(公告)日：1994-09-16
申请号：JP4241793
申请日：1993-03-03
申请人： UNIV NAGOYA , HITACHI LTD
发明人： UCHIYAMA SUSUMU , TSUNASHIMA SHIGERU , KANDA TATSUYA , JINBO MUTSUKO , NAKATANI RYOICHI , HOSOE YUZURU , SUGITA KEN
IPC分类号： G11B5/39 , G11B11/10 , H01F10/16 , H01F10/32
摘要： PURPOSE:To raise magnetoresistance change rate by using an Ni-Fe-Co group alloy of a face-centered cubic lattice structure as a magnetic layer and further orienting a specified crystal plane of the magnetic layer to be parallel to a substrate. CONSTITUTION:Relating to a multilayer magnetoresistance effect film using a multilayer film wherein a magnetic layer 11 and a non-magnetic layer 12 are laminated together, the magnetic layer 11 is an Ni-Fe-Co group alloy of a face-centered cubic lattice structure, and a crystal plane (111) of the magnetic layer 11 is assigned so that it is parallel to a substrate 14. Further, X-ray diffraction intensity of crystal plane (200) of the magnetic layer 11 is larger than that of crystal plane (111). Further, this is a multilayer magnetoresistance effect film wherein Co concentration of Ni-Fe-Co group alloy is 10-25at%. Thus, since high magnetoresistance change rate and low anisotropic magnetic field of magnetic layer are available, which is suitable to a magnetic head, a high- performance magnetic recording/reproducing device is available with this magnetic head.

4. 发明专利

JPH06295420A MAGNETO-RESISTANCE EFFECT ELEMENT AND MAGNETIC MEMORY DEVICE 失效
公开(公告)号：JPH06295420A
公开(公告)日：1994-10-21
申请号：JP2782792
申请日：1992-02-14
申请人： UNIV NAGOYA , HITACHI LTD
发明人： UCHIYAMA SUSUMU , TSUNASHIMA SHIGERU , HOSOE YUZURU , IMURA AKIRA
IPC分类号： G01R33/09 , G11B5/31 , G11B5/39 , H01F10/08 , H01F10/32 , H01L43/08 , G01R33/06
摘要： PURPOSE:To provide the magnetic memory device having an ultra-high density and large capacity by inserting a second ferromagnetic metallic layer thinner than a first kind of a ferromagnetic metallic layer between this ferromagnetic metallic layer and a nonferromagnetic metallic layer as a means for controlling the magnetic interaction between the magnetic layers included in multilayered magnetic thin films. CONSTITUTION:The multilayered magnetic thin films having a laminated structure are formed by sputtering on a ceramic substrate 10. These thin films are formed by successively laminating a Cu layer 1 having 3nm thickness, a Co layer 4 having a thickness (t), a Cu layer 1 having 3nm thickness, an insertion Co layer 2 having 2nm thickness, an NiFe layer 3 having 3nm thickness and an insertion Co layer 2 having 2nm thickness to form a laminated structure and laminating 20 periods of such laminated structures, one of which is as one period 5. The multilayered magnetic thin films consist of the structures obtd. by thinly forming the insertion Co layers 2, 2 between the NiFe layers 3 and Cu layers 1 of the multilayered films consisting of (Cu/Co/Cu/Co/NiFe/Co). The magnetic head capable of reproducing the information recorded at a high recording density of >=6000 megabit per one square inch with a good sensitivity is thus obtd.

5. 发明专利

JPH03248350A MAGNETO-OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH03248350A
公开(公告)日：1991-11-06
申请号：JP4260090
申请日：1990-02-26
申请人： UNIV NAGOYA , IDEMITSU PETROCHEMICAL CO
发明人： UCHIYAMA SUSUMU , TSUNASHIMA SHIGERU , ICHITANI KATSUMI
IPC分类号： G11B11/105 , G11B11/10
摘要： PURPOSE:To obtain the recording medium which is not decreased in Kerr rotating angle even if the wavelength of reading out light is short by specifying the compsn. ratio of Nd (neodymium) and Gd (gadolinium) of a reading out layer constituted of the elements of NdGdFeCo. CONSTITUTION:The magneto-optical recording medium has the reading out layer consisting of the elements of the NdGdFeCo and the recording holding layer consisting of a heavy rare earth-iron family alloy and is constituted by the medium as two-layered films with these two layers as an exchange bond and specifying X within a 0.06

6. 发明专利

JPH06103620A MAGNETO-OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH06103620A
公开(公告)日：1994-04-15
申请号：JP10631791
申请日：1991-03-26
申请人： UNIV NAGOYA , IDEMITSU PETROCHEMICAL CO
发明人： UCHIYAMA SUSUMU , TSUNASHIMA SHIGERU , OTANI TATSUO , ICHITANI KATSUMI
IPC分类号： G11B11/10 , G11B11/105
摘要： PURPOSE:To improve the reading-out characteristic of the magneto-optical recording medium. CONSTITUTION:The magneto-optical recording medium is constituted by laminating a glass substrate/protective layer (SiN) 1/reading out layer (GdFeCo) 2a/ recording holding layer (TbFeCo) 2b/protective layer (SiN) 3/reflection layer (Al) 4 in this order. The recording layer 2 is divided into the reading out layer 2a and the recording holding layer 2b and is made into a two-structure formed by exchange bonding of these layers. The entire film thickness thereof is specified to 15 to 45nm.

7. 发明专利

JP2006080241A Solid memory device 审中-公开
标题翻译：固体存储器件
公开(公告)号：JP2006080241A
公开(公告)日：2006-03-23
申请号：JP2004261601
申请日：2004-09-08
申请人： Sanyo Electric Co Ltd , Univ Nagoya , 三洋電機株式会社 , 国立大学法人名古屋大学
发明人： TSUNASHIMA SHIGERU , KATO TSUYOSHI , NOGUCHI HITOSHI , YAMAGUCHI ATSUSHI
IPC分类号： H01L27/105 , G11C11/15 , H01L21/8246 , H01L43/08
摘要： PROBLEM TO BE SOLVED: To provide a solid memory device which has a simple structure, and is capable of achieving further densification, higher accessibility, and longer stability in recording while suppressing power consumption substantially.
SOLUTION: The solid memory device comprises magnetization fixing layers 101, 109 which are composed of a permanent magnet, or an antiferromagnetic material for fixing the direction of magnetization of high-spin polarized layers 102, 104, 106, 108. The polarized layers consist of magnetic layers showing a high spin polarity. The memory also includes insulating layers 103, 107 which exert a tunnel magnetic resistance effect to contribute to memory read-out, and emit Joule's heat as a writing current passes through the insulating layers 103, 107 to heat a writing layer 105. The writing layer 105 is of a magnetization reversing layer whose direction of magnetization reverses in response to a spin carrier injection from the high-spin polarized layers 102, 104, 106, 108. The writing layer 105 shows a low Curie temperature (150 to 300°C), and is capable of magnetization reversal with fewer spin injection when subjected to heat.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种具有简单结构并且能够实现进一步致密化，更高可接近性和更长的记录稳定性的固态存储器件，同时基本上抑制功率消耗。固体存储器件包括由永磁体或用于固定高自旋极化层102,104,106,108的磁化方向的反铁磁材料构成的磁化固定层101,109。层由表现出高自旋极性的磁性层组成。存储器还包括施加隧道磁阻效应以有助于存储器读出的绝缘层103,107，并且当写入电流通过绝缘层103,107以加热写入层105时，发出焦耳热。写入层 105是磁化反转层，其磁化方向响应于从高自旋极化层102,104,106,108的自旋载流子注入而反转。写入层105显示出低的居里温度（150至300℃）并且当经受热时能够通过较少的自旋注入而磁化反转。版权所有（C）2006，JPO＆NCIPI

8. 发明专利

JP2000285668A MAGNETIC MEMORY DEVICE 失效
公开(公告)号：JP2000285668A
公开(公告)日：2000-10-13
申请号：JP8455499
申请日：1999-03-26
申请人： UNIV NAGOYA , SANYO ELECTRIC CO
发明人： TSUNASHIMA SHIGERU , IWATA SATOSHI , KATO TSUYOSHI , TAKAGI NAOYUKI , TANUMA TOSHIO , WASHIMI SATOSHI
IPC分类号： G11C11/15 , H01L21/8246 , H01L27/105 , H01L43/08
摘要： PROBLEM TO BE SOLVED: To make recordable/reproducible information with a small operative magnetic field and by reducing an effect on an adjacent cell. SOLUTION: This device is provided with a magnetic memory element 1 arrayed in a matrix form, a magnetic field applying means 2 for applying a magnetic field to the magnetic memory element 1 for information recording/ reproducing, and an element heating means 3 for heating the magnetic memory element 1 such that only the selected magnetic memory 1 is operable by a magnetic field made by the magnetic field applying means 2.

9. 发明专利

JPH07307039A MAGNETO-OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH07307039A
公开(公告)日：1995-11-21
申请号：JP19478391
申请日：1991-07-09
申请人： UNIV NAGOYA , IDEMITSU PETROCHEMICAL CO
发明人： UCHIYAMA SUSUMU , TSUNASHIMA SHIGERU , OTANI TATSUO , ICHITANI KATSUMI
IPC分类号： G11B11/10 , G11B11/105
摘要： PURPOSE:To obtain a magneto-optical recording medium excellent in readout characteristics in a short wavelength region and having satisfactory coercive force by using a multilayered film formed by alternately depositing NdGd layers and Fe layers as a recording layer. CONSTITUTION:A multilayered film formed by alternately depositing layers 1 of at least NdGd and layers 2 of at least Fe is used as a recording layer 3 to obtain the objective magneto-optical recording medium. The NdGd layers 1 may further contain one or more kinds of elements selected from among Pr, Tb and Dy. The Fe layers 2 may further contain one or more kinds of elements selected from among Co, Ni, Cr and Ti. The NdGd layers 1 contain at least Nd and Gd and the ratio of Gd to Nd is preferably regulated so that the characteristics of Nd are not deteriorated.

10. 发明专利

JPH0721609A MAGNETO-OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH0721609A
公开(公告)日：1995-01-24
申请号：JP12824792
申请日：1992-04-21
申请人： UNIV NAGOYA , IDEMITSU PETROCHEMICAL CO
发明人： UCHIYAMA SUSUMU , TSUNASHIMA SHIGERU , ICHITANI KATSUMI
IPC分类号： G11B11/10 , G11B11/105
摘要： PURPOSE:To erase a record in a small external magnetic field by using an exchagne coupled two-layered film consisting of a 1st recording film and a 2nd recording film as a recording layer, imparting specified coercive force in a temp. region above the Curie temp. of the 1st recording film to the 2nd recording film and leaving magnetization in the 2nd recording film. CONSTITUTION:A protective film 2 of SiAlN, a 2nd recording film 12 of GdFeCo, a 1st recording film 11 of TbFeCo, a protective film 3 of SiAlN and a reflecting film 4 of AlTi are successively formed on a PC substrate 1. The recording films 12, 11 constitute a recording layer 10 as an exchange-coupled two-layered film, the ratio of Gd:Fe:Co in the film 12 is 21 is 21:74:5 and the ratio of Tb:Fe:Co in the film 11 is 21:70:9. The film 12 has

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