Crystallographic and magnetic behavior in crystallization process of FeTaC film

Author

Miura, Michiyori ; Obata, Akihisa

Author_Institution

Multimedia Syst. R&D Div., Hitachi Ltd., Totsuka, Japan

Volume

32

Issue

3

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

1952

Lastpage

1958

Abstract

We have studied the crystallographic and magnetic behavior of amorphous Fe₇₉Ta₁₀C₁₁ films during the crystallization process. The crystallization process starts with the precipitation of Ta or TaC_1-x. The saturation magnetizations of the film and Fe grain size increase at the same time. The increase in saturation magnetization is completed at ~480°C, Fe and Ta phase separation seem to be completed at this temperature. The anomalous state appears between 480 and 530°C, in which good soft magnetic properties do not appear at room temperature, although the Fe grain size is small enough. The source of this phenomenon is the weak intergranular ferromagnetic coupling caused by the formation of a magnetic material with a low Curie point at the Fe grain boundary

Keywords

Curie temperature; crystallisation; exchange interactions (electron); ferromagnetic materials; grain boundaries; grain size; iron alloys; nanostructured materials; precipitation; soft magnetic materials; tantalum alloys; 480 C; 480 to 530 C; Fe grain boundary; Fe grain size; Fe₇₉Ta₁₀C₁₁; FeTaC film; amorphous Fe₇₉Ta₁₀C₁₁ films; crystallization process; crystallographic behavior; low Curie point; magnetic behavior; phase separation; precipitation; saturation magnetization; soft magnetic properties; weak intergranular ferromagnetic coupling; Amorphous magnetic materials; Crystallization; Crystallography; Grain size; Iron; Magnetic films; Magnetic separation; Saturation magnetization; Soft magnetic materials; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.492892

Filename

492892