Magnetic hardening in FePt nanostructured films

被引：51

作者：

Liu, JP ^{[1
]}

Liu, Y ^{[1
]}

Luo, CP ^{[1
]}

Shan, ZS ^{[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：

10.1063/1.364681

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

FePt films have been prepared by sputtering Fe/Pt multilayers onto glass or silicon substrates. The thickness of the Fe and Pt layers was adjusted with the Fe:Pt atomic ratio from about 1:1 to 2:1. Magnetic hardening is observed after heat treatment at elevated temperatures, which led to coercivity values exceeding 20 kOe in samples with an Fe:Pt ratio around 1.2:1. The hardening originates from the formation of the tetragonal FePt phase with high magnetocrystalline anisotropy and a favorable microstructure. Two-phase composite films containing hard and soft phases were obtained when the Fe:Pt ratio increased. Under optimized processing conditions, composite films with energy products larger than 30 MG Oe at room temperature have been successfully produced. (C) 1997 American Institute of Physics.

引用

页码：5644 / 5646

页数：3

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