Microfabrication of FeMnPt films involving magnetic phase change due to structural transformation caused by ion irradiation |
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Authors: | Takashi Hasegawa Ryosuke Kasahara Kaori Sasaki Shunji Ishio |
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Affiliation: | Department of Materials Science, Akita University, Akita, Japan |
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Abstract: | Correlations between crystal structures and magnetic properties of Fe1–xMnx Pt films were studied. The disordered films with x ≥ 0.44 had paramagnetic properties and the ordered films with x ≥ 0.46 had antiferromagnetic properties, viz. a difference of 0.02 in the x ‐value (i.e., 1.0 at%) was found. At x = 0.44 with the ordered structure, the uniaxial magnetocrystalline anisotropy was about 2.1 × 107 erg cm–3. A microfabrication process involving the slight composition difference of 0.02, which results in ferromagnetic–paramagnetic phase change due to the structural transformation caused by ion irradiation, was investigated. Only the area irradiated by Mn ions changed from ferromagnetic to paramagnetic phase. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim) |
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Keywords: | microfabrication ion irradiation magnetic phase structural transformation Fe1− x Mnx Pt thin films |
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