Abstract
Magnetic properties (Curie temperature, magnetization, magnetic anisotropy and rotational hysteresis loss) of Co 100− x Cr x films (18 ⩽ x ⩽ 22) and bulk alloys (0 ⩽ × ⩽ 24) were measured to make clear the origin of the perpendicular magnetic anisotropy in Co-Cr films. The magnetization, magnetic anisotropy and rotational hysteresis loss in films are discussed by taking account of the dispersion of the magnetic anisotropy due to a microscopic compositional inhomogeneity. The rotational hysteresis loss of bubble materials such as YFeO 3 and Sm 0.4Y 2.6Fe 3.8Ga 1.2O 12 are also investigated and compared with that of the Co-Cr film.
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