Title :
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
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;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7157511
