摘要:
A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.
摘要翻译:一种低耦合垂直磁记录介质,包括磁存储层和至少一个低饱和磁化层。 磁存储层具有在约400-900emu / cm 3之间的饱和磁化强度,并且至少一个低饱和磁化层的饱和磁化强度低于磁存储层的饱和磁化强度。
摘要:
The present invention relates to perpendicular magnetic recording media with improved signal-to-medium noise ratio (“SMNR”) and thermal stability, which media include a pair of vertically spaced-apart perpendicular ferromagnetic layers which are anti-ferromagnetically coupled (“AFC”) across a non-magnetic spacer layer. The invention is of particular utility in the fabrication of data/information storage and retrieval media, e.g., hard disks, having ultra-high areal recording/storage densities.
摘要:
A high areal recording density magnetic recording medium having improved thermal stability comprises: a non-magnetic substrate having at least one surface; and a layer stack overlying the at least one surface, comprised of at least one layer pair composed of first and second superposed ferromagnetic layers spaced-apart by a magnetic coupling structure comprising a thin non-magnetic spacer layer and at least one thin ferromagnetic interface layer at at least one interface between the non-magnetic spacer layer and the superposed ferromagnetic layers; wherein the thickness of the ferromagnetic interface layer is selected to provide enhancement of the magnetic coupling between the pair of ferromagnetic layers, thereby increasing the thermal stability of the magnetic recording medium.
摘要:
A bit patterned magnetic recording medium, comprises a non-magnetic substrate having a surface; a plurality of spaced apart magnetic elements on the surface, each of the elements constituting a discrete magnetic domain or bit; and a layer of a ferromagnetic material for regulating magnetic exchange coupling between said magnetic elements. The layer has a saturation magnetization Ms ranging from about 1 to about 2,000 emu/cm3, preferably below about 400 emu/cm3, more preferably below about 200 emu/cm3, and may overlie, underlie, or at least partially fill spaces between adjacent magnetic elements.
摘要翻译:一种图案化的磁记录介质,包括具有表面的非磁性基底; 表面上的多个间隔开的磁性元件,每个元件构成离散的磁畴或位; 以及用于调节所述磁性元件之间的磁交换耦合的铁磁材料层。 该层具有约1至约2,000emu / cm 3,优选低于约400emu / cm 3,更优选低于约200emu / cm 3的饱和磁化强度Ms,并且可以覆盖,基本上或至少部分地填充相邻磁性 元素。
摘要:
A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.
摘要:
In one example embodiment, a method includes depositing one or more thin-film layers onto a substrate. More particularly, at least one of the thin-film layers comprises at least one electropositive material and at least one of the thin-film layers comprises at least one chalcogen material suitable for forming a chalcogenide material with the electropositive material. The method further includes annealing the one or more deposited thin-film layers at an average heating rate of or exceeding 1 degree Celsius per second. The method may also include cooling the annealed one or more thin-film layers at an average cooling rate of or exceeding 0.1 degrees Celsius per second.
摘要:
A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.
摘要翻译:一种低耦合垂直磁记录介质,包括磁存储层和至少一个低饱和磁化层。 磁存储层具有在约400-900emu / cm 3之间的饱和磁化强度,并且至少一个低饱和磁化层的饱和磁化强度低于磁存储层的饱和磁化强度。
摘要:
A perpendicular magnetic recording layer of a magnetic recording medium includes a plurality of bit-patterned magnetic islands, wherein each of the plurality of islands overlay a soft magnetic under-layer. Each of the magnetic islands includes a first magnetic sub-layer adjacent a second magnetic sub-layer, wherein the first sub-layer has a relatively high magnetic anisotropy that is greater than a magnetic anisotropy of the second sub-layer. The magnetic recording layer further includes a third sub-layer, which extends to connect each of the plurality of islands. The third sub-layer may have a magnetic anisotropy that is less than that of the second sub-layer of each of the magnetic islands and/or may serve as an interlayer, extending between the first sub-layer and the soft magnetic under-layer of the recording medium, and having a structure to help to produce the greater anisotropy first magnetic sub-layer.
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:
A novel method of manufacturing a longitudinal granular oxide recording medium is disclosed. The method preferably entails obtaining a non-magnetic substrate, heating the substrate at a temperature T1 that is greater than 150° C., forming a first layer with body-centered cubic atomic structure and with a preferred growth orientation, cooling the substrate to a temperature T2 and forming a second layer comprising a magnetic oxide-containing granular magnetic layer with a hexagonal close packed atomic structure and with a preferred growth orientation. The magnetic oxide-containing granular magnetic layer contains magnetic crystal grains that are substantially isolated by an inter-granular region comprising a non-magnetic substance, wherein the non-magnetic substance is preferably an oxide-containing material.