Title :
Microstructure and Magnetic Properties of FePt–Cr2O3 Films
Author :
Shiroyama, Taisuke ; Varaprasad, Bollapragada S. D. C. S. ; Takahashi, Yukiko K. ; Hono, Kazuhiro
Author_Institution :
Nat. Inst. for Mater. Sci., Tsukuba, Japan
Abstract :
We have studied the microstructures and magnetic properties of FePt with various metal oxides, to achieve an ideal media structure on glass substrates for thermally assisted magnetic recording. Unlike FePt-C granular films, FePt-MxOy(M = Ti, Nb, W, Zr, and Al) granular films showed an interconnected in-plane microstructure and low coercivity. However, the usage of Cr2O3 as a segregant leads to very fine columnar granular structure, while there is still room for improvement in coercivity.
Keywords :
chromium compounds; coercive force; granular materials; iron alloys; magnetic thin films; platinum alloys; FePt-Cr2O3; SiO2; coercivity; columnar granular structure; glass substrates; granular films; interconnected in-plane microstructure; magnetic properties; thermally assisted magnetic recording; Anisotropic magnetoresistance; Coercive force; Glass; Grain size; Heat-assisted magnetic recording; Microstructure; FePt; granular film; heat-assisted magnetic recording (HAMR);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2321615
