Size effect on the ordering of FePt granular films

被引：113

作者：

Takahashi, YK ^{[1
]}

Ohkubo, T ^{[1
]}

Ohnuma, M ^{[1
]}

Hono, K ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2003年 / 93卷 / 10期

关键词：

D O I：

10.1063/1.1555895

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated the A1-->L1(0) ordering process of FePt granular films with different particle sizes. Although FePt particles larger than similar to7 nm ordered by annealing at 600degreesC, the ordering did not proceed when the particle size was smaller than similar to4 nm in diameter. This suggests that there is a size dependence on the ordering of FePt particles. Calculation of the Helmholtz free energy using the Lennard-Jones potential suggested that T-c decreases below the annealing temperature when the particle size is decreased to a few nanometers suggesting that experimental observation is physically feasible. (C) 2003 American Institute of Physics.

引用

页码：7166 / 7168

页数：3

共 9 条

[1] The effect of thermal agitation on atomic arrangement in alloys - II [J].