Simulation of L10 FePt columnar microstructure by using phase field model

Author

Liu, L. ; Ohsasa, K. ; Zhang, L. ; Ishio, S.

Author_Institution

Venture Bus. Lab., Akita Univ., Akita, Japan

fYear

2015

fDate

11-15 May 2015

Firstpage

1

Lastpage

1

Abstract

Heat Assisted Magnetic Recording (HAMR) media demands L1₀ FePt-X(segregant) thin films should have small and columnar FePt grains with high coercivity. Various segregants, such as C, SiO₂ and etc. [1-3] have been doped to obtain small and columnar FePt grains, especially, in which the aspect ratio of each columnar FePt grain should be larger than 1.5 so as to keep thermal stability of magnetic moment. However, the elaborate mechanisms are still indistinct on how to fabricate the necessitated FePt-X media from laboratory. Therefore, it is extremely essential to investigate the mechanisms about how to form columnar FePt grains by theoretical simulation in order to guide experiment works.

Keywords

coercive force; crystal microstructure; iron alloys; magnetic moments; platinum alloys; thermal stability; thermomagnetic recording; FePt; L1₀ FePt columnar microstructure; coercivity; columnar grains; heat assisted magnetic recording; magnetic moment; phase field model; thermal stability; Heat-assisted magnetic recording; Media; Microstructure; Shape; Solid modeling; Thermal stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference (INTERMAG), 2015 IEEE

Conference_Location

Beijing

Print_ISBN

978-1-4799-7321-7

Type

conf

DOI

10.1109/INTMAG.2015.7157511

Filename

7157511