Fabrication and magnetization reversal of L10 FeMnPt dots surrounded by paramagnetic A1 phase formed by ion irradiation

SCRIPTA MATERIALIA

卷:142

Article

Hasegawa, Takashi¹  Sasaki, Kaori¹  Barton, Craig W.²  Thomson, Thomas² 

[1] Akita Univ, Dept Mat Sci, 1-1 Tegata Gakuen Machi, Akita 0108502, Japan

[2] Univ Manchester, Sch Comp Sci, Manchester M13 9PL, Lancs, England

关键词: Iron alloys;    Order-disorder phenomena;    Nanostructured materials;    Ion-beam processing;    Magnetic recording media;   

DOI  :  10.1016/j.scriptamat.2017.08.009

来源: Elsevier

【 摘 要 】

A nanopatterning method involving a ferromagnetic (FM)-paramagnetic (PM) phase transformation caused by ion irradiation has been developed. A (Fe0.56Mn0.44)(50)Pt-50 film with the ordered L1(0) structure and uniaxial magnetocrystalline anisotropy constant (K-u) of 2.1 x 10(6) J m(-3) was fabricated. Mn ion irradiation produced a smooth FM dot array with dot diameters of 100 nm surrounded by the PM phase, which was obtained from the induced FM-PM phase transition caused by the structural transformation from the L1(0) structure to the disordered A1 structure and a slight increase in the Mn content. The magnetization reversal process was studied by investigating the angle dependence of the dot reversal field. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd.

【 授权许可】

Free