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

A nanopatterning method involving a ferromagnetic (FM)–paramagnetic (PM) phase transformation caused by ion irradiation has been developed. A (Fe0.56Mn0.44)50Pt50 film with the ordered L10 structure and uniaxial magnetocrystalline anisotropy constant (Ku) of 2.1×106Jm−3 was fabricated. Mn ion irradi...

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Bibliographic Details
Published inScripta materialia Vol. 142; pp. 6 - 9
Main Authors Hasegawa, Takashi, Sasaki, Kaori, Barton, Craig W., Thomson, Thomas
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.2018
Subjects
Ion-beam processing
Iron alloys
Magnetic recording media
Nanostructured materials
Order–disorder phenomena
Magnetic recording media
Iron alloys
Order–disorder phenomena
Nanostructured materials
Ion-beam processing
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Summary:A nanopatterning method involving a ferromagnetic (FM)–paramagnetic (PM) phase transformation caused by ion irradiation has been developed. A (Fe0.56Mn0.44)50Pt50 film with the ordered L10 structure and uniaxial magnetocrystalline anisotropy constant (Ku) of 2.1×106Jm−3 was fabricated. Mn ion irradiation produced a smooth FM dot array with dot diameters of 100nm surrounded by the PM phase, which was obtained from the induced FM–PM phase transition caused by the structural transformation from the L10 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. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2017.08.009