公开(公告)号：US20090011283A1

公开(公告)日：2009-01-08

申请号：US11712559

申请日：2007-03-01

申请人： Erol Girt ,  Raj N. Thangaraj

发明人： Erol Girt ,  Raj N. Thangaraj

IPC分类号： G11B5/73 ,  B05D5/12

CPC分类号： G11B5/667

摘要： A perpendicular magnetic recording medium of the embodiments of the invention comprises a substrate, a hcp soft underlayer (SUL), and a magnetic layer, wherein the hcp SUL is adapted to create a [0002] growth orientation in the magnetic layer and to enhance a magnetic head field during writing of data to the magnetic layer; further wherein the perpendicular magnetic recording medium does not contain an interlayer (IL) that is different from the hcp SUL and provides a [0002] growth orientation in the magnetic layer.

摘要翻译： 本发明实施例的垂直磁记录介质包括基底，hcp软底层（SUL）和磁性层，其中hcp SUL适于在磁性层中产生生长取向并增强 在向磁性层写入数据期间的磁头场; 进一步其中所述垂直磁记录介质不含有与所述hcp SUL不同的中间层（IL），并提供所述磁性层中的生长取向。

公开(公告)号：US20080085427A1

公开(公告)日：2008-04-10

申请号：US11544632

申请日：2006-10-10

申请人： Erol Girt ,  Raj N. Thangaraj ,  Qixu Chen

发明人： Erol Girt ,  Raj N. Thangaraj ,  Qixu Chen

IPC分类号： G11B5/66

CPC分类号： G11B5/667 ,  H01F10/132 ,  H01F41/32

摘要： A corrosion resistant perpendicular magnetic recording medium comprises: (a) a non-magnetic substrate having a surface; and (b) a layer stack formed over the substrate surface and comprising, in overlying sequence from the surface: (i) a magnetically soft underlayer (SUL); (ii) at least one non-magnetic interlayer; and (iii) at least one magnetically hard perpendicular recording layer; wherein the SUL comprises an FeCo-based alloy material having a composition selected to provide: (1) a substantially amorphous microstructure with a smooth surface in contact with the non-magnetic interlayer; (2) high saturation magnetization Ms greater than about 1.6 T; and (3) corrosion resistance.

摘要翻译： 耐腐蚀垂直磁记录介质包括：（a）具有表面的非磁性基材; 和（b）在所述基板表面上形成的层叠层，并且以从所述表面重叠的顺序包括：（i）磁软底层（SUL）; （ii）至少一个非磁性中间层; 和（iii）至少一个磁性硬的垂直记录层; 其中所述SUL包括FeCo基合金材料，所述FeCo基合金材料的组成被选择为提供：（1）具有与所述非磁性中间层接触的光滑表面的基本无定形的微结构; （2）高饱和磁化强度Ms大于约1.6T; 和（3）耐腐蚀性。

公开(公告)号：US20080055777A1

公开(公告)日：2008-03-06

申请号：US11515752

申请日：2006-09-06

申请人： Shanghsien (Alex) Rou ,  Qixu (David) Chen ,  Raj N. Thangaraj ,  Huan Tang ,  Xinwei Li ,  Jing Gui

发明人： Shanghsien (Alex) Rou ,  Qixu (David) Chen ,  Raj N. Thangaraj ,  Huan Tang ,  Xinwei Li ,  Jing Gui

IPC分类号： G11B5/82

CPC分类号： G11B5/66 ,  G11B5/72

摘要： A scratch erasure resistant perpendicular magnetic recording medium comprises a non-magnetic substrate having a surface, and a layer stack formed over the surface and comprising: (i) at least one magnetically hard perpendicular magnetic recording layer; and (ii) at least one low shear modulus layer comprising at least one material having a shear modulus not greater than about 30 GPa. Preferably, the at least one magnetically hard perpendicular magnetic recording layer includes at least a first layer comprised of a magnetic material having a hexagonal close packed (hcp) crystal structure and preferred basal plane crystallographic orientation with c-axis perpendicular to a surface thereof.

摘要翻译： 耐刮擦的垂直磁记录介质包括具有表面的非磁性衬底和形成在表面上的层叠，并且包括：（i）至少一个磁性硬的垂直磁记录层; 和（ii）包含至少一种剪切模量不大于约30GPa的材料的至少一种低剪切模量层。 优选地，至少一个磁性硬的垂直磁记录层至少包括由具有六方密堆积（hcp）晶体结构的磁性材料组成的第一层，以及具有垂直于表面的c轴的优选的基面平面晶体取向 其中。