FePt nanocomposite films for optical-magnetic hybrid recording media

2005 ◽  
Author(s):  
F. J. Yang ◽  
Hao Wang ◽  
H. B. Wang ◽  
X. Cao ◽  
J. A. Wang ◽  
...  
Keyword(s):  
Nanocomposite Films ◽  
Recording Media ◽  
Hybrid Recording

Co3Pt Nanocomposite Films for Perpendicular Magnetic Recording Media

2010 ◽  
Vol 123-125 ◽  
pp. 27-30 ◽  
Author(s):  
Chih Long Shen ◽  
Po Cheng Kuo ◽  
S.C. Chen ◽  
C.D. Chen ◽  
S.L. Hsu ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Process Parameters ◽  
Magnetic Recording ◽  
Magnetic Layer ◽  
Nanocomposite Films ◽  
Recording Media ◽  
Magnetic Recording Media ◽  
Perpendicular Magnetic Recording ◽  
Significant Potential

The Co3Pt magnetic layer with thickness of 7~28 nm was deposited onto the Pt underlayer. The as-deposited Co3Pt/Pt double-layered films with or without a 5 nm Pt capped layer were annealed at temperatures between 275 and 375 °C in vacuum of 1 mTorr. The influences of process parameters on perpendicular magnetic properties of Co3Pt thin films were investigated. The Co3Pt film with perpendicular coercivity (Hc⊥) value of 3620 Oe and the perpendicular squareness (S⊥) of 0.7 could be achieved from the Co3Pt(18 nm)/Pt(100 nm) double-layered films by annealing at 300°C. Further added Tb30Co70 film on the Co3Pt/Pt double-layered film could greatly enhance the perpendicular magnetic properties of the film. The Hc⊥ and S⊥ of the Tb30Co70/Co3Pt/Pt film were as high as 6560 Oe and 0.88, respectively, which has significant potential to be applied in perpendicular magnetic recording media.

scholarly journals Advanced hybrid recording media

2005 ◽  
Author(s):  
Zuoyi Li ◽  
Xiaomin Cheng ◽  
Fang Jin ◽  
Zhen Li ◽  
Gengqi Lin ◽  
...  
Keyword(s):  
Recording Media ◽  
Hybrid Recording

The influence of porous alumina underlayer on structure and magnetization reverals of hybrid recording media

2008 ◽  
Author(s):  
J. B. Yan ◽  
Z. Y. Li ◽  
K. F. Dong ◽  
P. Li ◽  
G. Q. Lin ◽  
...  
Keyword(s):  
Porous Alumina ◽  
Recording Media ◽  
Hybrid Recording

CoPt/Ag(Cu) nanocomposite films for ultra-high density perpendicular magnetic recording media

2006 ◽  
Vol 505 (1-2) ◽  
pp. 77-80 ◽  
Author(s):  
Hao Wang ◽  
S.X. Xue ◽  
F.J. Yang ◽  
H.B. Wang ◽  
X. Cao ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
High Density ◽  
Nanocomposite Films ◽  
Recording Media ◽  
Magnetic Recording Media ◽  
Perpendicular Magnetic Recording

Optimization of CoPt/B nanocomposite films for ultrahigh-density recording media

2001 ◽  
Vol 90 (6) ◽  
pp. 3112-3114 ◽  
Author(s):  
V. Karanasos ◽  
I. Panagiotopoulos ◽  
D. Niarchos ◽  
H. Okumura ◽  
G. C. Hadjipanayis
Keyword(s):  
Nanocomposite Films ◽  
Recording Media ◽  
Ultrahigh Density

Effect of thin carbon layer insertion on the magnetic property and microstructure of CoCrPt/Ti hybrid recording media

2008 ◽  
Author(s):  
X. M. Cheng ◽  
X. S. Miao ◽  
X. F. Yang ◽  
Z. Li ◽  
G. Q. Lin ◽  
...  
Keyword(s):  
Magnetic Property ◽  
Carbon Layer ◽  
Recording Media ◽  
Thin Carbon ◽  
Hybrid Recording

FePt Nanocluster Films for High-Density Magnetic Recording

2007 ◽  
Vol 7 (1) ◽  
pp. 206-224 ◽  
Author(s):  
Y. F. Xu ◽  
M. L. Yan ◽  
D. J. Sellmyer
Keyword(s):  
Magnetic Properties ◽  
Magnetic Recording ◽  
Composite Films ◽  
Areal Density ◽  
Nanocomposite Films ◽  
Recording Media ◽  
Perpendicular Media ◽  
High Anisotropy ◽  
Self Assembled ◽  
High Density Magnetic Recording

High anisotropy L10 ordered FePt thin films are considered to have high potential for use as high areal density recording media, beyond 1 Tera bit/in2. In this paper, we review recent results on the synthesis and magnetic properties of L10 FePt nanocomposite films. Several fabrication methods have been developed to produce high-anisotropy FePt films: epitaxial and non-epitaxial growth of (001)-oriented FePt:X (X = Au, Ag, Cu, C, etc.) composite films that might be used for perpendicular media; monodispersed FePt nanocluster-assembled films grown with a gas-aggregation technique and having uniform cluster size and narrow size distribution; self-assembled FePt particles prepared with chemical synthesis by reduction/decomposition techniques, etc. The magnetic properties are controllable through variations in the nanocluster properties and nanostructure. FePt and related films show promise for development as heat-assisted magnetic recording media at extremely high areal densities. The self-assembled FePt arrays show potential for approaching the ultimate goal of single-grain-per-bit patterned media.

Microstructural characterization of CoPtCr/Cr thin film disks by cross-section TEM and elongated probe micro-diffraction

1991 ◽  
Vol 49 ◽  
pp. 762-763
Author(s):  
M.A. Parker ◽  
K.E. Johnson ◽  
C. Hwang ◽  
A. Bermea
Keyword(s):  
Magnetic Recording ◽  
Electron Probe ◽  
Microstructural Characterization ◽  
Crystallographic Structure ◽  
Recording Media ◽  
Layer By Layer ◽  
Cross Sectional ◽  
New Techniques ◽  
Polished Side

We have reported the dependence of the magnetic and recording properties of CoPtCr recording media on the thickness of the Cr underlayer. It was inferred from XRD data that grain-to-grain epitaxy of the Cr with the CoPtCr was responsible for the interaction observed between these layers. However, no cross-sectional TEM (XTEM) work was performed to confirm this inference. In this paper, we report the application of new techniques for preparing XTEM specimens from actual magnetic recording disks, and for layer-by-layer micro-diffraction with an electron probe elongated parallel to the surface of the deposited structure which elucidate the effect of the crystallographic structure of the Cr on that of the CoPtCr.XTEM specimens were prepared from magnetic recording disks by modifying a technique used to prepare semiconductor specimens. After 3mm disks were prepared per the standard XTEM procedure, these disks were then lapped using a tripod polishing device. A grid with a single 1mmx2mm hole was then glued with M-bond 610 to the polished side of the disk.

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