公开(公告)号：US20140001398A1

公开(公告)日：2014-01-02

申请号：US13980703

申请日：2012-01-19

申请人： Migaku Takahashi ,  Tomoyuki Ogawa ,  Yasunobu Ogata ,  Naoya Kobayashi ,  Chammika Ruwan Polwatta Gallage ,  Kaori Kohara

发明人： Migaku Takahashi ,  Tomoyuki Ogawa ,  Yasunobu Ogata ,  Naoya Kobayashi ,  Chammika Ruwan Polwatta Gallage ,  Kaori Kohara

IPC分类号： H01F1/01 ,  H01F41/00

CPC分类号： H01F1/01 ,  B22F1/02 ,  B22F9/22 ,  B22F2999/00 ,  C01B21/0622 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/42 ,  C22C21/00 ,  C22C29/16 ,  H01F1/065 ,  H01F1/083 ,  H01F1/086 ,  H01F41/00 ,  H01F41/0266 ,  B22F2201/013

摘要： The present invention relates to ferromagnetic particles capable of exhibiting a high purity and excellent magnetic properties from the industrial viewpoints and a process for producing the ferromagnetic particles, and also provides an anisotropic magnet, a bonded magnet and a compacted magnet which are obtained by using the ferromagnetic particles. The ferromagnetic particles comprising an Fe16N2 compound phase in an amount of not less than 80% as measured by Mössbauer spectrum and each having an outer shell in which FeO is present in the form of a film having a thickness of not more than 5 nm according to the present invention can be produced by subjecting iron oxide or iron oxyhydroxide having an average major axis diameter of 40 to 5000 nm and an aspect ratio (major axis diameter/minor axis diameter) of 1 to 200 as a starting material to dispersing treatment to prepare aggregated particles; subjecting the iron compound particles passed through a mesh to hydrogen reducing treatment at a temperature of 160 to 420° C.; and then subjecting the resulting particles to nitridation treatment at a temperature of 130 to 170° C.

摘要翻译： 本发明涉及从工业观点出发具有高纯度和优异磁特性的铁磁性颗粒以及制造铁磁性颗粒的方法，并且还提供了各向异性磁体，粘结磁体和压实磁体，它们通过使用 铁磁颗粒。 所述铁磁性粒子包含通过Mössbauer光谱测定的不小于80％的Fe 16 N 2化合物相，并且每个具有外壳，其中FeO以厚度不超过5nm的膜的形式存在，根据 本发明可以通过使平均长轴直径为40〜5000nm，长径比（长轴径/短轴直径）为1〜200的氧化铁或羟基氧化铁作为起始原料进行分散处理而制备 聚集颗粒; 使通过网的铁化合物颗粒在160〜420℃的温度下进行氢还原处理。 然后在130〜170℃的温度下对得到的粒子进行氮化处理。

公开(公告)号：US08154828B2

公开(公告)日：2012-04-10

申请号：US12500835

申请日：2009-07-10

申请人： Yoshihiro Tsuchiya ,  Shinji Hara ,  Kiyoshi Noguchi ,  Migaku Takahashi ,  Masakiyo Tsunoda

发明人： Yoshihiro Tsuchiya ,  Shinji Hara ,  Kiyoshi Noguchi ,  Migaku Takahashi ,  Masakiyo Tsunoda

IPC分类号： G11B5/39

CPC分类号： G11B5/3929 ,  B82Y10/00 ,  B82Y25/00 ,  G11B2005/3996

摘要： An MR element in a CPP structure includes a spacer layer made of Cu, a magnetic pinned layer containing CoFe and a free layer containing CoFe that are laminated to sandwich the spacer layer. The free layer is located below the magnetic pinned layer. The free layer is oriented in a (001) crystal plane, the spacer layer is formed and oriented in a (001) crystal plane on the (001) crystal plane of the free layer. Therefore, in a low resistance area where an area resistivity (AR) of the MR element is, for example, lower than 0.3 Ω·μm2, an MR element that has a large variation of a resistance is obtained.

摘要翻译： CPP结构中的MR元件包括由Cu制成的间隔层，包含CoFe的磁性固定层和层压以夹持间隔层的CoFe的自由层。 自由层位于磁性固定层的下方。 自由层在（001）晶面取向，间隔层形成并定向在自由层的（001）晶面上的（001）晶面上。 因此，在MR元件的面积电阻率（AR）例如低于0.3

公开(公告)号：US08034471B2

公开(公告)日：2011-10-11

申请号：US12536225

申请日：2009-08-05

申请人： Shinichi Ishibashi ,  Migaku Takahashi ,  Shin Saito ,  Yuzo Sasaki ,  Atsushi Hashimoto ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

发明人： Shinichi Ishibashi ,  Migaku Takahashi ,  Shin Saito ,  Yuzo Sasaki ,  Atsushi Hashimoto ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

IPC分类号： G11B5/66

CPC分类号： G11B5/82 ,  G11B5/65 ,  G11B5/667 ,  G11B5/732

摘要： In a perpendicular magnetic recording medium in which at least a soft magnetic underlayer, an orientation control layer, a magnetic recording layer and a protective layer are formed on a non-magnetic substrate in order from the bottom, the orientation control layer has a laminated structure of two or more layers including an intermediate layer and a seed layer which is disposed closer to the non-magnetic substrate than the intermediate layer. The seed layer includes two or more kinds of elements having a face-centered cubic structure, has face-centered cubic (111) plane crystals oriented in a direction perpendicular to a substrate surface, and has a pseudo-hexagonal structure.

摘要翻译： 在从底部起依次形成至少软磁性底层，取向控制层，磁记录层和保护层的垂直磁记录介质中，取向控制层具有层叠结构 包括比中间层更靠近非磁性基板设置的中间层和种子层的两层以上的层。 种子层包括具有面心立方结构的两种或更多种元件，具有在垂直于衬底表面的方向上取向的面心立方（111）面晶体，并且具有假六边形结构。

公开(公告)号：US07862915B2

公开(公告)日：2011-01-04

申请号：US11640979

申请日：2006-12-19

申请人： Tomoyuki Maeda ,  Migaku Takahashi ,  Masahiro Oka

发明人： Tomoyuki Maeda ,  Migaku Takahashi ,  Masahiro Oka

IPC分类号： G11B5/65

CPC分类号： G11B5/7325 ,  G11B5/1278 ,  G11B5/82

摘要： According to one embodiment, a multilayered underlayer including a first underlayer containing Cu aligned in a (111) plane and a second underlayer formed on the Cu underlayer and containing Cu and nitrogen as main components is formed.

摘要翻译： 根据一个实施方案，形成包含在（111）面中排列的Cu的第一底层和形成在Cu底层上并含有Cu和氮作为主要成分的第二底层的多层底层。

公开(公告)号：US20100165510A1

公开(公告)日：2010-07-01

申请号：US12601372

申请日：2008-05-21

申请人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

发明人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

IPC分类号： G11B5/82

CPC分类号： G11B5/667 ,  G11B5/65 ,  G11B5/66 ,  G11B5/7379

摘要： A magnetic recording medium comprising a substrate, at least one soft magnetic underlayer formed on the substrate, a perpendicular magnetic recording layer formed on the soft magnetic underlayer, and a protective layer formed on the perpendicular magnetic recording layer, is provided wherein the perpendicular magnetic recording layer is comprised of a primary recording layer, a non-magnetic intermediate layer and an auxiliary layer; the primary recording layer comprises magnetic crystal grains and grain boundary portions surrounding the magnetic crystal grains, and has a perpendicular magnetic anisotropy; the auxiliary layer has a negative magneto crystalline anisotropy; and the non-magnetic intermediate layer is formed between the primary recording layer and the auxiliary layer and comprises at least one metal selected from Ru, Rh and Ir, or at least one alloy thereof. This magnetic recording medium exhibits high heat resistance and good recording/reproducing characteristics, and enables a high recording density.

摘要翻译： 一种磁记录介质，其特征在于，包括基板，形成在基板上的至少一个软磁性底层，形成在软磁性底层上的垂直磁记录层和形成在垂直磁记录层上的保护层，其中垂直磁记录 层由主记录层，非磁性中间层和辅助层构成; 主记录层包括磁晶粒和围绕磁晶粒的晶界部分，并且具有垂直的磁各向异性; 辅助层具有负磁结晶各向异性; 并且非磁性中间层形成在初级记录层和辅助层之间，并且包含至少一种选自Ru，Rh和Ir的金属，或其至少一种合金。 该磁记录介质具有高的耐热性和良好的记录/再现特性，并且能够实现高的记录密度。

公开(公告)号：US07618708B2

公开(公告)日：2009-11-17

申请号：US10926868

申请日：2004-08-26

申请人： Mikihisa Mizuno ,  Yuichi Sasaki ,  Andrew Chak Chung Yu ,  Makoto Inoue ,  Migaku Takahashi ,  Kazuyuki Tohji ,  Jeyaderan Balachandran

发明人： Mikihisa Mizuno ,  Yuichi Sasaki ,  Andrew Chak Chung Yu ,  Makoto Inoue ,  Migaku Takahashi ,  Kazuyuki Tohji ,  Jeyaderan Balachandran

IPC分类号： B32B5/16

CPC分类号： B82Y25/00 ,  G11B5/855 ,  Y10T428/254 ,  Y10T428/2991 ,  Y10T428/2995

摘要： An organic layer capable of forming surface areas having an adsorption property different from that of a periphery due to the chemical change of a surface functional group is formed on a board. The surface of the organic layer is patterned and oxidized by a scanning probe microscope to form an array pattern in which small sections for adsorbing nanoparticles are arranged. Then, nanoparticle dispersed solution is applied to the organic layer having the array pattern or the organic layer is dipped in the nanoparticle dispersed solution to form a particle layer on the organic layer. At this time, the nanoparticles in the nanoparticle dispersed solution are respectively fixed only onto the small sections. Therefore, a nanoparticle array on which groups of nanoparticles are arranged in an array can be obtained. Thus, the nanoparticle array on which the groups of the nanoscale particles are arranged on the board is efficiently formed.

摘要翻译： 在板上形成能够形成由于表面官能团的化学变化而具有与周围不同的吸附性的表面积的有机层。 通过扫描探针显微镜对有机层的表面进行图案化和氧化，形成其中排列有用于吸附纳米颗粒的小截面的阵列图案。 然后，将纳米颗粒分散溶液施加到具有阵列图案的有机层，或者将有机层浸渍在纳米颗粒分散溶液中以在有机层上形成颗粒层。 此时，纳米颗粒分散溶液中的纳米颗粒分别仅固定在小部分上。 因此，可以获得纳米颗粒阵列，其中纳米颗粒组排列成阵列。 因此，能够有效地形成纳米级的纳米粒子群配置在基板上的纳米粒子阵列。

公开(公告)号：US20090147401A1

公开(公告)日：2009-06-11

申请号：US12300073

申请日：2007-05-05

申请人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

发明人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

IPC分类号： G11B5/127 ,  G11B5/33

CPC分类号： G11B5/667 ,  G11B5/7325

摘要： The present invention provides a magnetic recording medium capable of recording or reproducing high-density information by reducing the grain size of a perpendicular magnetic recording layer and improving vertical orientation, a method of manufacturing the same, and a magnetic recording/reproducing apparatus. The perpendicular magnetic recording medium includes: a non-magnetic substrate; and at least an soft magnetic layer, an under layer, an intermediate layer, and a perpendicular magnetic recording film that are formed on the non-magnetic substrate. At least one layer of the intermediate layer is made of an alloy material of an element having an fcc structure and an element having a bcc structure or an hcp structure, and has both a crystal structure having (111) orientation and an irregular layer lattice (stacking fault) caused by a mixture of the fcc structure and the bcc structure. The at least one layer of the intermediate layer is made of an alloy material of at least one element that is selected from a group composed of Pt, Ir, Pd, Au, Ni, and Co, which is a main ingredient, and has the fcc structure, and an element having the bcc structure or the hcp structure.

摘要翻译： 本发明提供一种能够通过减小垂直磁记录层的晶粒尺寸并提高垂直取向来记录或再现高密度信息的磁记录介质，其制造方法和磁记录/再现装置。 垂直磁记录介质包括：非磁性基板; 以及形成在非磁性基板上的至少软磁性层，下层，中间层和垂直磁记录膜。 中间层的至少一层由具有fcc结构的元素和具有bcc结构或hcp结构的元素的合金材料制成，并且具有具有（111）取向的晶体结构和不规则层晶格（ 堆叠故障）由fcc结构和bcc结构的混合引起。 中间层的至少一层由选自由作为主要成分的Pt，Ir，Pd，Au，Ni和Co组成的组中的至少一种元素的合金材料制成，并且具有 fcc结构，以及具有bcc结构或hcp结构的元素。

公开(公告)号：US20080180860A1

公开(公告)日：2008-07-31

申请号：US11998361

申请日：2007-11-29

申请人： Migaku Takahashi ,  Masakiyo Tsunoda ,  Kojiro Komagaki

发明人： Migaku Takahashi ,  Masakiyo Tsunoda ,  Kojiro Komagaki

IPC分类号： G11B5/33

CPC分类号： B82Y10/00 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3929 ,  G11B2005/3996 ,  H01F10/3254 ,  H01F10/3272

摘要： In the magnetic thin film, a magnetization direction of a ferromagnetic layer, e.g., a pinned layer, can be securely fixed. The magnetic thin film comprises: an antiferromagnetic layer; and the ferromagnetic layer. The antiferromagnetic layer is composed of a manganic antiferromagnetic material, and a manganese (Mn) layer is formed between the antiferromagnetic layer and the ferromagnetic layer.

摘要翻译： 在磁性薄膜中，可以牢固地固定铁磁层的磁化方向，例如被钉扎层。 磁性薄膜包括：反铁磁层; 和铁磁层。 反铁磁层由锰铁反铁磁性材料构成，反铁磁层与铁磁层之间形成锰（Mn）层。

公开(公告)号：US20070259214A1

公开(公告)日：2007-11-08

申请号：US11666309

申请日：2005-10-28

申请人： Migaku Takahashi ,  Masahiro Oka ,  Akira Kikitsu

发明人： Migaku Takahashi ,  Masahiro Oka ,  Akira Kikitsu

IPC分类号： G11B5/667

CPC分类号： G11B5/732

摘要： The invention provides a perpendicular magnetic recording medium in which the recording density is greatly increased with little deviation of the crystal structure. A perpendicular magnetic recording medium has at least a soft magnetic under layer, an orientation control layer, a perpendicular magnetic layer, and a protective layer, which are formed on a nonmagnetic substrate, the orientation control layer consisting of a plurality of layers including a seed layer and an intermediate layer from the substrate side. Preferably, the seed layer and the intermediate layer each have a hexagonal close-packed (hcp) structure, and the average grain size of the seed layer is between 8 nm and 20 nm. The main component of the seed layer is preferably Mg, and the main component of the intermediate layer is preferably Ru.

摘要翻译： 本发明提供了一种垂直磁记录介质，其中记录密度大大增加，晶体结构几乎没有偏差。 垂直磁记录介质至少形成在非磁性基板上的软磁下层，取向控制层，垂直磁性层和保护层，所述取向控制层由包括种子的多个层 层和中间层。 优选地，种子层和中间层各自具有六方密堆积（hcp）结构，种子层的平均晶粒尺寸在8nm和20nm之间。 种子层的主要成分优选为Mg，中间层的主要成分优选为Ru。

公开(公告)号：US20050158585A1

公开(公告)日：2005-07-21

申请号：US10509244

申请日：2003-03-20

申请人： Migaku Takahashi ,  Shin Saito ,  David Djayaprawira

发明人： Migaku Takahashi ,  Shin Saito ,  David Djayaprawira

IPC分类号： B32B15/01 ,  C22C38/02 ,  C22C38/06 ,  C23C28/00 ,  G11B5/66 ,  G11B5/667 ,  G11B5/73 ,  G11B5/84 ,  G11B5/851 ,  H01F10/14 ,  H01F41/14 ,  B05D5/12

CPC分类号： C22C38/02 ,  B32B15/01 ,  C22C38/06 ,  C23C28/321 ,  C23C28/34 ,  C23C28/343 ,  C23C28/347 ,  G11B5/66 ,  G11B5/667 ,  G11B5/8404 ,  G11B5/851 ,  Y10T428/265

摘要： A vertical magnetic recording medium has a low-noise characteristic compared to media of a permalloy or sendust crystalline material, including a high-flatness soft magnetic backing layer, and enabling recording/reproduction of information at high recording density, a magnetic recorder provided with the vertical magnetic recording medium, a vertical magnetic recording medium manufacturing method and apparatus. The vertical magnetic recording medium has a multilayer structure on a substrate, in which a soft magnetic backing layer, a vertical recording layer of a ferromagnetic body, and a protective layer are formed. The soft magnetic backing layer is formed of an FeSiAlN film of a soft magnetic material. The atom % of each element of Fe, Si, Al, and N of the FeSiAlN film can be changed by changing the flow rate of N2 gas in a mixture gas of N2 gas and Ar gas introduced into the chamber.

摘要翻译： 垂直磁记录介质与坡莫合金或铁硅铝结晶材料的介质相比具有低噪声特性，包括高平坦度软磁背衬层，并且能够以高记录密度记录/再现信息，磁记录器具有 垂直磁记录介质，垂直磁记录介质制造方法和装置。 垂直磁记录介质在其上形成软磁背衬层，铁磁体垂直记录层和保护层的基板上具有多层结构。 软磁背衬层由软磁材料的FeSiAlN膜形成。 FeSiAlN膜的Fe，Si，Al和N的各元素的原子％可以通过改变引入到室中的N 2气体和Ar气体的混合气体中的N 2气体的流量来改变。