Magnetic, structural and microstructural properties of FePt/M (M = C, BN) granular films

被引：116

作者：

Christodoulides, JA

Farber, P

Daniil, M

Okumura, H

Hadjipanayis, GC

Skumryev, V

Simopoulos, A

Weller, D

机构：

[1] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[2] NCSR Demokritos, Inst Mat Sci, GR-15310 Athens, Greece

[3] Seagate Technol, Pittsburgh, PA 15203 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2001年 / 37卷 / 04期

基金：

美国国家科学基金会;

关键词：

FePt; recording media; thin films;

D O I：

10.1109/20.950821

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Nanocomposite FePt/C and FePt/BN thin films have been fabricated by dc and rf magnetron sputtering on naturally-oxidized Si (100) substrates. Particles consisting of the highly anisotropic tetragonal L1(0) FePt phase were obtained by annealing the as-made multilayers by a conventional vacuum furnace in the temperature range of 500 to 800 degreesC. By controlling the annealing conditions, samples with grain size in the range of 3 to 20 nm were obtained, with coercivities between 2 and 16 kOe. The evolution of crystal structure during annealing at 600 degreesC was studied in FePt/C and the dependence of a, c and c/a on annealing time were determined. These data were used to estimate the degree of ordering which was found to increase with aging, but with a maximum value less than the bulk value, explaining thus the lower H-C in the nanoparticles.

引用

页码：1292 / 1294

页数：3

共 11 条

[1] Ordering and orientation of CoPt/SiO2 granular films with additive Ag [J].