Mechanism of coercivity enhancement by Ag addition in FePt-C granular films for heat assisted magnetic recording media

被引：31
|
作者：
Varaprasad, B. S. D. Ch. S. [1 ]
Takahashi, Y. K. [1 ]
Wang, J. [1 ]
Ina, T. [2 ]
Nakamura, T. [2 ]
Ueno, W. [2 ]
Nitta, K. [2 ]
Uruga, T. [2 ]
Hono, K. [1 ]
机构：
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[2] Japan Synchrotron Radiat Res Inst JASRI SPring 8, Sayo, Hyogo 6795198, Japan
来源：
APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 22期
关键词：
THIN-FILMS;
D O I：
10.1063/1.4880655
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigated the Ag distribution in a FePtAg-C granular film that is under consideration for a heat assisted magnetic recording medium by aberration-corrected scanning transmission electron microscope-energy dispersive X-ray spectroscopy and X-ray absorption fine structure. Ag is rejected from the core of FePt grains during the deposition, forming Ag-enriched shell surrounding L1(0)-ordered FePt grains. Since Ag has no solubility in both Fe and Pt, the rejection of Ag induces atomic diffusions thereby enhancing the kinetics of the L1(0)-order in the FePt grains. (C) 2014 AIP Publishing LLC.
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页数：4
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