公开(公告)号：US06280813B1

公开(公告)日：2001-08-28

申请号：US09416364

申请日：1999-10-08

申请人： Matthew Joseph Carey ,  Eric Edward Fullerton ,  Bruce Alvin Gurney ,  Hal Jervis Rosen ,  Manfred Ernst Schabes

发明人： Matthew Joseph Carey ,  Eric Edward Fullerton ,  Bruce Alvin Gurney ,  Hal Jervis Rosen ,  Manfred Ernst Schabes

IPC分类号： B32B302

CPC分类号： C23C28/021 ,  C23C28/00 ,  C23C28/023 ,  C23C28/42 ,  G11B5/66

摘要： A magnetic recording medium for data storage uses a magnetic recording layer having at least two ferromagnetic films antiferromagnetically coupled together across a nonferromagnetic spacer film. The magnetic moments of the two antiferromagnetically-coupled films are oriented antiparallel, and thus the net remanent magnetization-thickness product (Mrt) of the recording layer is the difference in the Mrt values of the two ferromagnetic films. This reduction in Mrt is accomplished without a reduction in the thermal stability of the recording medium because the volumes of the grains in the antiferromagnetically-coupled films add constructively. In a magnetic recording rigid disk application, the magnetic layer comprises two ferromagnetic films, each a granular film of a sputter deposited CoPtCrB alloy, separated by a Ru spacer film having a thickness to maximize the antiferromagnetic exchange coupling between the two CoPtCrB films. One of the ferromagnetic films is made thicker than the other, but the thicknesses are chosen so that the net moment in zero applied magnetic field is low, but nonzero.

摘要翻译： 用于数据存储的磁记录介质使用具有至少两个铁磁膜的磁记录层，其通过非铁磁间隔膜反铁磁耦合在一起。 两个反铁磁耦​​合薄膜的磁矩定向反平行，因此记录层的净残磁强度 - 厚度积（Mrt）是两个铁磁膜的Mrt值之差。 由于反铁磁耦合膜中的晶粒的体积增加，所以Mrt的这种减少是在记录介质的热稳定性降低的情况下完成的。 在磁记录刚性盘应用中，磁性层包括两个铁磁膜，每个是由溅射沉积的CoPtCrB合金的粒状膜，由具有厚度的Ru隔离膜隔开，以使两个CoPtCrB膜之间的反铁磁交换耦合最大化。 其中一个铁磁膜比另一个更厚，但是选择厚度使得零施加磁场的净力矩低，但非零。

公开(公告)号：US06594100B2

公开(公告)日：2003-07-15

申请号：US09903959

申请日：2001-07-11

申请人： Matthew Joseph Carey ,  Eric Edward Fullerton ,  Bruce Alvin Gurney ,  Hal Jervis Rosen ,  Manfred Ernst Schabes

发明人： Matthew Joseph Carey ,  Eric Edward Fullerton ,  Bruce Alvin Gurney ,  Hal Jervis Rosen ,  Manfred Ernst Schabes

IPC分类号： G11B503

CPC分类号： C23C28/021 ,  C23C28/00 ,  C23C28/023 ,  C23C28/42 ,  G11B5/66

摘要： A method for writing data on a magnetic recording medium includes providing a magnetic recording layer having at least two ferromagnetic films antiferromagnetically coupled together across a nonferromagnetic spacer film, with one of the ferromagnetic films having a greater magnetic moment than the other. A positive write field is applied to a first region to align the moments of both ferromagnetic films with the positive field, and then a negative write field is applied to an adjacent region to align the moments of both ferromagnetic films with the negative field. When the medium is moved away from the write fields, the moment of the ferromagnetic film with the lesser moment in each region flips to be antiparallel to the moment of the other ferromagnetic film in its region. The result is that the adjacent regions become adjacent magnetized domains with the transition between the domains representative of the written data.

摘要翻译： 一种在磁记录介质上写入数据的方法包括提供具有至少两个铁磁膜的磁记录层，所述至少两个铁磁膜在非铁磁隔离膜上反铁磁耦合在一起，其中一个铁磁膜具有比另一个更大的磁矩。 将正写入场施加到第一区域以将两个铁磁膜的力矩与正场对准，然后将负写入场施加到相邻区域以将两个铁磁膜的力矩与负场对准。 当介质从写入场移动时，每个区域中具有较小力矩的铁磁膜的力矩翻转成与其区域中的另一个铁磁膜的时刻反平行。 结果是相邻区域变成相邻的磁化域，其中代表写入数据的域之间的转变。

公开(公告)号：US20110090594A1

公开(公告)日：2011-04-21

申请号：US12603443

申请日：2009-10-21

申请人： Bruce Alvin Gurney ,  Manfred Ernst Schabes ,  Bruce Alexander Wilson

发明人： Bruce Alvin Gurney ,  Manfred Ernst Schabes ,  Bruce Alexander Wilson

IPC分类号： G11B5/23

CPC分类号： G11B5/3133 ,  G11B2005/001

摘要： A magnetic head having a magnetic wiggler structure for initiating a high frequency magnetic oscillation in a magnetic to improve media-writeability and increase data density. The wiggler structure includes a plurality of magnetic layers that are antiparallel coupled with one another across non-magnetic antiparallel coupling layers. The wiggler structure is arranged just up-track from the point of data writing so that the high frequency oscillation is initiated just prior to the writing of data on the magnetic media.

摘要翻译： 一种具有磁摆动结构的磁头，用于启动磁性中的高频磁振荡以提高介质可写性并增加数据密度。 摆动结构包括在非磁性反平行耦合层上彼此反平行耦合的多个磁性层。 摆动结构从数据写入的角度开始排列正好，从而在磁介质上写入数据之前开始高频振荡。

公开(公告)号：US08514519B2

公开(公告)日：2013-08-20

申请号：US12603443

申请日：2009-10-21

申请人： Bruce Alvin Gurney ,  Manfred Ernst Schabes ,  Bruce Alexander Wilson

发明人： Bruce Alvin Gurney ,  Manfred Ernst Schabes ,  Bruce Alexander Wilson

IPC分类号： G11B5/187 ,  G11B5/127

CPC分类号： G11B5/3133 ,  G11B2005/001

摘要： A magnetic head having a magnetic wiggler structure for initiating a high frequency magnetic oscillation in a magnetic to improve media-writeability and increase data density. The wiggler structure includes a plurality of magnetic layers that are antiparallel coupled with one another across non-magnetic antiparallel coupling layers. The wiggler structure is arranged just up-track from the point of data writing so that the high frequency oscillation is initiated just prior to the writing of data on the magnetic media.

摘要翻译： 一种具有磁摆动结构的磁头，用于启动磁性中的高频磁振荡以提高介质可写性并增加数据密度。 摆动结构包括在非磁性反平行耦合层上彼此反平行耦合的多个磁性层。 摆动结构从数据写入的角度开始排列正好，从而在磁介质上写入数据之前开始高频振荡。

公开(公告)号：US06383668B1

公开(公告)日：2002-05-07

申请号：US09536868

申请日：2000-03-27

申请人： Eric Edward Fullerton ,  David Thomas Margulies ,  Ernesto Esteban Marinero ,  Manfred Ernst Schabes

发明人： Eric Edward Fullerton ,  David Thomas Margulies ,  Ernesto Esteban Marinero ,  Manfred Ernst Schabes

IPC分类号： G11B566

CPC分类号： G11B5/66 ,  Y10S428/90

摘要： A magnetic recording disk has a magnetic recording layer formed on a special multilayered “host” layer. The host layer is a “synthetic antiferromagnetically”, i.e., at least two ferromagnetic films that are exchange-coupled antiferromagnetically (AF) to one another across a nonferromagnetic spacer film so that their magnetic moments are oriented antiparallel. The magnetic recording layer has a different composition from the top ferromagnetic film in the host layer and is ferromagnetically coupled to the top ferromagnetic film of the host layer. The magnetic volume V of the composite structure (magnetic recording layer and host layer) that determines the thermal stability will be approximately the sum of the volumes of the grains in the magnetic recording layer and the AF-coupled ferromagnetic films of the host layer. However, the magnetic moment of the composite structure is primarily just the moment from the magnetic recording layer because the host layer is designed to have essentially no net magnetic moment.

摘要翻译： 磁记录盘具有形成在特殊多层“主体”层上的磁记录层。 主体层是“合成的反铁磁性”，即至少两个铁磁膜，其通过非铁磁隔离膜彼此交互耦合反铁磁（AF），使得它们的磁矩反向取向。 磁记录层与主体层中的顶部铁磁膜具有不同的组成，并与主体层的顶部铁磁膜铁磁耦合。 确定热稳定性的复合结构（磁记录层和主体层）的磁体积V将近似为磁记录层中的晶粒的体积和主体层的AF耦合铁磁性膜之和。 然而，复合结构的磁矩主要仅在磁记录层的时刻，因为主体层被设计成基本上没有净磁矩。

公开(公告)号：US06723450B2

公开(公告)日：2004-04-20

申请号：US10103186

申请日：2002-03-19

申请人： Hoa Van Do ,  Mary F. Doerner ,  Eric Edward Fullerton ,  David Thomas Margulies ,  William G. McChesney ,  Manfred Ernst Schabes ,  Kai Tang

发明人： Hoa Van Do ,  Mary F. Doerner ,  Eric Edward Fullerton ,  David Thomas Margulies ,  William G. McChesney ,  Manfred Ernst Schabes ,  Kai Tang

IPC分类号： G11B566

CPC分类号： G11B5/66 ,  G11B5/82 ,  Y10T428/12646 ,  Y10T428/12854 ,  Y10T428/12861 ,  Y10T428/12868 ,  Y10T428/12889 ,  Y10T428/12896 ,  Y10T428/24967

摘要： A magnetic recording medium for data storage uses a magnetic recording layer having at least two ferromagnetic films with different remanent magnetization-thickness (Mrt) values that are coupled antiparallel across a nonferromagnetic spacer film predominantly by the dipole field (Hd) from the grains of the higher-Mrt ferromagnetic film. The material compositions and thicknesses of the ferromagnetic films and the nonferromagnetic spacer film are selected so that Hd predominates over any antiferromagnetic exchange coupling field (Haf) and is greater than the coercive field of the lower-Mrt ferromagnetic film. As a result, the magnetizations of the two ferromagnetic films are antiparallel in the two remanent magnetic states, and thus the net remanent magnetization-thickness product (Mrt) of the recording layer is the difference in the Mrt values of the two ferromagnetic films.

摘要翻译： 用于数据存储的磁记录介质使用具有至少两个铁磁膜的磁记录层，所述至少两个铁磁膜具有不同的剩余磁化厚度（Mrt）值，其主要由偶极场（Hd）与非磁性间隔膜 较高的Mrt铁磁膜。 选择铁磁膜和非铁磁隔离膜的材料组成和厚度，使得Hd优于任何反铁磁交换耦合场（Haf），并且大于下部Mrt铁磁膜的矫顽场。 结果，两个铁磁膜的磁化在两个剩余磁状态下是反平行的，因此记录层的净残磁强度 - 厚度乘积（Mrt）是两个铁磁膜的Mrt值之差。

公开(公告)号：US06440589B1

公开(公告)日：2002-08-27

申请号：US09324606

申请日：1999-06-02

申请人： Eric Edward Fullerton ,  David Thomas Margulies ,  Ernesto Esteban Marinero ,  Manfred Ernst Schabes

发明人： Eric Edward Fullerton ,  David Thomas Margulies ,  Ernesto Esteban Marinero ,  Manfred Ernst Schabes

IPC分类号： G11B566

CPC分类号： G11B5/66 ,  G11B5/746 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/265

摘要： A magnetic recording disk has a magnetic recording layer that includes a ferromagnetic host layer and a ferromagnetic overlay deposited directly on the host layer with an effective overlay thickness in the range of 1-40 Angstroms. The ferromagnetic material used in the overlay contains Co, Fe and/or Ni and has a magnetic moment significantly greater than that of the material in the ferromagnetic host layer. The ferromagnetic overlays improve the thermal stability of superparamagnetic grains contained within the host layers by magnetically coupling the grains through bridging. The enhanced thermal stability of the media allows for the use of thinner ferromagnetic host layers, and leads to lower remanent magnetization-thickness product (Mrt) values and higher recording densities.

摘要翻译： 磁记录盘具有磁记录层，该磁记录层包括铁磁性主体层和直接沉积在主体层上的铁磁覆层，其有效覆盖厚度在1-40埃的范围内。 在覆盖层中使用的铁磁材料包含Co，Fe和/或Ni，并且具有显着大于铁磁性主体层中的材料的磁矩的磁矩。 铁磁覆盖层通过桥接磁耦合晶粒来改善主体层中所含的超顺磁性晶粒的热稳定性。 介质的增强的热稳定性允许使用更薄的铁磁性主体层，并且导致较低的剩余磁化 - 厚度乘积（Mrt）值和更高的记录密度。

公开(公告)号：US08755142B2

公开(公告)日：2014-06-17

申请号：US13528794

申请日：2012-06-20

申请人： Michael Konrad Grobis ,  Manfred Ernst Schabes

发明人： Michael Konrad Grobis ,  Manfred Ernst Schabes

IPC分类号： G11B5/54

CPC分类号： G11B19/045 ,  G11B5/596

摘要： A hard disk drive (HDD) has a high track misregistration (TMR) mode of writing data. If the position error signal (PES) from the servo positioning information exceeds a first write inhibit threshold (WI-1), writing is not inhibited but a high TMR mode of operation is enabled. In high TMR mode, prior to writing data to the target track, the data on the adjacent tracks is read and stored in a buffer. The data to be written to the target track is also stored in the buffer, and is flagged to indicate that the data needs to be written. The data is then written to the target track. However, if during writing the PES exceeds a second threshold (WI-2), then the data from the adjacent encroached track in the buffer is flagged for writing and the process repeated with the encroached track set as the target track.

摘要翻译： 硬盘驱动器（HDD）具有写入数据的高轨迹重合失调（TMR）模式。 如果来自伺服定位信息的位置误差信号（PES）超过第一写入禁止阈值（WI-1），则不禁止写入，而是能够进行高TMR操作模式。 在高TMR模式中，在将数据写入目标轨迹之前，相邻轨道上的数据被读取并存储在缓冲器中。 要写入目标轨道的数据也存储在缓冲区中，并被标记以指示数据需要写入。 然后将数据写入目标轨道。 然而，如果在写入期间PES超过第二阈值（WI-2），则来自缓冲器中的相邻被侵入轨道的数据被标记为写入，并且以侵入的轨道设置为目标轨道重复该过程。

公开(公告)号：US08116031B2

公开(公告)日：2012-02-14

申请号：US12419278

申请日：2009-04-06

申请人： Michael Alex ,  John Thomas Contreras ,  Manfred Ernst Schabes ,  Xinzhi Xing

发明人： Michael Alex ,  John Thomas Contreras ,  Manfred Ernst Schabes ,  Xinzhi Xing

IPC分类号： G11B5/17

CPC分类号： G11B5/3123 ,  G11B5/1278 ,  G11B2005/001

摘要： A perpendicular magnetic recording system has a write head having a main helical coil (the write coil) and main pole (the write pole) that directs write flux in a direction perpendicular to the recording layer in the magnetic recording medium, and an auxiliary coil and auxiliary pole that injects magnetic flux into the write pole at an angle to the primary or perpendicular axis of the write pole. The auxiliary coil is preferably a helical coil wrapped around the auxiliary pole. The additional flux from the auxiliary pole, which is injected non-parallel to the primary magnetization of the write pole, exerts a relatively large torque on the magnetization of the write pole, thereby facilitating magnetization reversal of the write pole. Electrical circuitry is connected to the main coil and the auxiliary coil to generate the auxiliary flux simultaneous with the switching of the magnetization of the write pole.

摘要翻译： 垂直磁记录系统具有写磁头，该写头具有主磁螺旋线圈（写线圈）和主磁极（写磁极），其在与磁记录介质中的记录层垂直的方向上引导写磁通，辅助线圈和 辅助极以与写极的主轴或垂直轴成一定角度注入磁极。 辅助线圈优选为缠绕在辅助极上的螺旋线圈。 来自辅助极的不平行于写入磁极的一次磁化的附加磁通对写入磁极的磁化施加相对较大的转矩，从而促进写入极的磁化反转。 电路连接到主线圈和辅助线圈，以与写入极的磁化转换同时产生辅助通量。

公开(公告)号：US20100254041A1

公开(公告)日：2010-10-07

申请号：US12419278

申请日：2009-04-06

申请人： Michael Alex ,  John Thomas Contreras ,  Manfred Ernst Schabes ,  Xinzhi Xing

发明人： Michael Alex ,  John Thomas Contreras ,  Manfred Ernst Schabes ,  Xinzhi Xing

IPC分类号： G11B5/17

CPC分类号： G11B5/3123 ,  G11B5/1278 ,  G11B2005/001

摘要： A perpendicular magnetic recording system has a write head having a main helical coil (the write coil) and main pole (the write pole) that directs write flux in a direction perpendicular to the recording layer in the magnetic recording medium, and an auxiliary coil and auxiliary pole that injects magnetic flux into the write pole at an angle to the primary or perpendicular axis of the write pole. The auxiliary coil is preferably a helical coil wrapped around the auxiliary pole. The additional flux from the auxiliary pole, which is injected non-parallel to the primary magnetization of the write pole, exerts a relatively large torque on the magnetization of the write pole, thereby facilitating magnetization reversal of the write pole. Electrical circuitry is connected to the main coil and the auxiliary coil to generate the auxiliary flux simultaneous with the switching of the magnetization of the write pole.

摘要翻译： 垂直磁记录系统具有写磁头，该写头具有主磁螺旋线圈（写线圈）和主磁极（写磁极），其在与磁记录介质中的记录层垂直的方向上引导写磁通，辅助线圈和 辅助极以与写极的主轴或垂直轴成一定角度注入磁极。 辅助线圈优选为缠绕在辅助极上的螺旋线圈。 来自辅助极的不平行于写入磁极的一次磁化的附加磁通对写入磁极的磁化施加相对较大的转矩，从而促进写入极的磁化反转。 电路连接到主线圈和辅助线圈，以与写入极的磁化转换同时产生辅助通量。