Heteroepitaxial growth of tetragonal Mn2.7−xFexGa1.3 (0 ≤ x ≤ 1.2) Heusler films with perpendicular magnetic anisotropy
作者： Claudia Felser , Thomas Höche , Adel Kalache , Roshnee Sahoo , Susanne Selle
DOI: 10.1063/1.4991468
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摘要: This work reports on the structural and magnetic properties of Mn2.7−xFexGa1.3 Heusler films with different Fe content x (0 ≤ 1.2). The were deposited heteroepitaxially MgO single crystal substrates, by magnetron sputtering. thickness 35 nm crystallized in a tetragonal D022 structure (001) preferred orientation. Tunable achieved changing x. thin exhibit high uniaxial anisotropy Ku ≥ 1.4 MJ/m3, coercivity from 0.95 to 0.31 T, saturation magnetization 290 570 kA/m. film Mn1.6Fe1.1Ga1.3 composition shows 1.47 MJ/m3 energy product (BH)max 37 kJ/m3 at room temperature. These findings demonstrate that have promising for mid-range permanent magnet spintronic applications.
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