Variation of magnetic properties by heat treatment on CoFeNi alloys

Author

Kim, H. ; Park, C. ; Lee, J. ; Jeung, W.

Author_Institution

KIST, Seoul

fYear

2006

fDate

8-12 May 2006

Firstpage

844

Lastpage

844

Abstract

In this study, the effect of heat treatment temperature on the magnetic properties and phase of electroplated CoFeNi and CoFeNiCu alloys was investigated. In case of CoFeNi alloys, coercivity, iHc was decreased from 0.4 to 0.2 A/m and permeability was increased from 3.4times10⁶ to 4.6times10⁶ with increasing heat treatment temperature from 100 to 300degC. Saturation induction was increased with increasing heat treatment temperature from 100 to 500 degC. Coercivity of CoNiFe alloy increase rapidly when the heat treatment temperature was higher than 300degC. While, coercivity of CoNiFe alloy increase rapidly when the heat treatment was carried out over 400degC. Increasing heat treatment temperature, bcc and fcc phases in the CoFeNi alloy were grown, bcc phase was precipitated in the CoFeNiCu alloys and then, grain growth was happened.

Keywords

cobalt alloys; coercive force; electroplated coatings; ferromagnetic materials; grain growth; heat treatment; iron alloys; magnetic permeability; magnetic thin films; nickel alloys; CoFeNi; bcc phase; electroplating; fcc phase; grain growth; heat treatment; magnetic properties; permeability; saturation induction; temperature 100 degC; temperature 300 degC; temperature 500 degC; Coercive force; Heat treatment; Magnetic films; Magnetic flux density; Magnetic heads; Magnetic materials; Magnetic properties; Magnetic recording; Soft magnetic materials; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2006. INTERMAG 2006. IEEE International

Conference_Location

San Diego, CA

Print_ISBN

1-4244-1479-2

Type

conf

DOI

10.1109/INTMAG.2006.374875

Filename

4262277