Correlation of switching volume with magnetic properties, microstructure, and media noise in CoCr(Pt)Ta thin films

被引：18

作者：

Gao, C ^{[1
]}

Shan, ZS ^{[1
]}

Malmhall, R ^{[1
]}

Liu, Y ^{[1
]}

Richter, HJ ^{[1
]}

Barney, A ^{[1
]}

Rauch, GC ^{[1
]}

Sellmyer, DJ ^{[1
]}

机构：

[1] UNIV NEBRASKA,CTR MAT RES & ANAL,LINCOLN,NE 68588

来源：

JOURNAL OF APPLIED PHYSICS | 1997年 / 81卷 / 08期

关键词：

D O I：

10.1063/1.365075

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The technique of ''field sweep-rate dependence of coercivity'' together with the delta-M curves, transmission electron microscopy, and media noise measurement have been employed to reveal the correlation among the magnetic switching volume, physical grain size, intergrain interaction, and noise properties. The switching volume for both CoCrTa and CoCrPtTa films was found to be similar to 15 nm in diameter, and weakly dependent on grain size and coercivity for the systems studied. In films with physical grain size larger than the switching volume, strong intergrain interaction and high media noise is observed. In films with the physical grain size close to the switching volume, smaller interactions and lower media noise is found. It is argued that a change of the grain size results in a change in the nature of the magnetic interactions. (C) 1997 American Institute of Physics.

引用

页码：3928 / 3930

页数：3

共 9 条

[1] NONUNIFORM SWITCHING OF SINGLE-DOMAIN PARTICLES AT FINITE TEMPERATURES [J].