公开(公告)号：US06391430B1

公开(公告)日：2002-05-21

申请号：US09602609

申请日：2000-06-21

申请人： Eric Edward Fullerton ,  Bruce David Terris ,  Dieter Klaus Weller

发明人： Eric Edward Fullerton ,  Bruce David Terris ,  Dieter Klaus Weller

IPC分类号： B32B702

CPC分类号： B82Y10/00 ,  G11B5/66 ,  G11B5/743 ,  Y10T428/24942 ,  Y10T428/2495

摘要： A magnetic recording disk is patterned into discrete magnetic and nonmagnetic regions with the magnetic regions serving as the magnetic recording data bits. The magnetic recording layer comprises two ferromagnetic films separated by a nonferromagnetic spacer film. The spacer film material composition and thickness is selected such that the first and second ferromagnetic films are antiferromagnetically coupled across the spacer film. After this magnetic recording layer has been formed on the disk substrate, ions are irradiated onto it through a patterned mask. The ions disrupt the spacer film and thereby destroy the antiferromagnetic coupling between the two ferromagnetic films. As a result, in the regions of the magnetic recording layer that are ion-irradiated the first and second ferromagnetic films are essentially ferromagnetically coupled so that the magnetic moments from the ferromagnetic films are parallel and produce a magnetic moment that is essentially the sum of the moments from the two films. In the non-irradiated regions of the magnetic recording layer, the first and second ferromagnetic films remain antiferromagnetically coupled so that their magnetic moments are oriented antiparallel. The composition and thicknesses of the first and second ferromagnetic films are selected such that essentially no magnetic field is detectable at a predetermined distance above the magnetic recording layer corresponding to the height that the magnetic recording head would be located.

摘要翻译： 将磁记录盘图案化成具有磁区用作磁记录数据位的离散磁和非磁性区域。 磁记录层包括由非铁磁隔离膜隔开的两个铁磁膜。 选择间隔膜材料组成和厚度使得第一和第二铁磁膜跨隔离膜反铁磁耦合。 在磁盘基板上形成磁记录层之后，通过图形掩模将离子照射到其上。 离子破坏间隔膜，从而破坏两个铁磁膜之间的反铁磁耦合。 结果，在离子照射的磁记录层的区域中，第一和第二铁磁膜基本上是铁磁耦合的，使得来自铁磁性膜的磁矩平行并产生磁矩，其基本上是 两部影片的片刻。 在磁记录层的未照射区域中，第一和第二铁磁膜保持反铁磁耦合，使得它们的磁矩反向取向。 选择第一和第二铁磁膜的组成和厚度，使得在对应于磁记录头将被定位的高度的磁记录层上方的预定距离处基本上不可检测到磁场。

公开(公告)号：US06383597B1

公开(公告)日：2002-05-07

申请号：US09602581

申请日：2000-06-21

申请人： Eric Edward Fullerton ,  Dieter Klaus Weller

发明人： Eric Edward Fullerton ,  Dieter Klaus Weller

IPC分类号： G11B565

CPC分类号： B82Y10/00 ,  G11B5/653 ,  G11B5/656 ,  G11B5/74 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855 ,  G11B2005/0029 ,  Y10T428/12875 ,  Y10T428/24479 ,  Y10T428/31

摘要： A patterned magnetic recording disk has a magnetic recording layer patterned into discrete magnetic and nonmagnetic regions having substantially the same chemical composition. The nonmagnetic regions have a chemically-ordered L12 crystalline structure and the magnetic regions have a chemically-disordered crystalline structure. The chemically-ordered intermetallic compound FePt3, which is nonferromagnetic, is rendered ferromagnetic by ion irradiation. This FePt3 material can be patterned by irradiating local regions through a mask to create magnetic regions that serve as the magnetic bits. The ions pass through the openings in the mask and impact the chemically-ordered FePt3 in selected regions corresponding to the pattern of holes in the mask. The ions disrupt the ordering of the Fe and Pt atoms in the unit cell and transform the FePt3 into magnetic regions corresponding to the mask pattern, with the regions of the film not impacted by the ions retaining their chemically-ordered structure.

摘要翻译： 图案化磁记录盘具有图案化成具有基本上相同化学成分的离散磁性和非磁性区域的磁记录层。 非磁性区域具有化学有序的L12晶体结构，并且磁性区域具有化学无序的结晶结构。 化学有序的金属间化合物FePt3是非铁磁性的，通过离子辐照形成铁磁性。 该FePt3材料可以通过用掩模照射局部区域来形成，以产生用作磁性位的磁性区域。 离子通过掩模中的开口，并在对应于掩模中的孔图案的选定区域内冲击化学有序的FePt3。 离子破坏单位晶胞中Fe和Pt原子的排序，并将FePt3转变成对应于掩模图案的磁性区域，膜的区域不受保留其化学有序结构的离子的影响。