- 著者
-
菊川 信吾
磯村 悟
岩田 聡
塩見 繁
内山 晋
- 出版者
- The Magnetics Society of Japan
- 雑誌
- 日本応用磁気学会誌 (ISSN:02850192)
- 巻号頁・発行日
- vol.7, no.2, pp.83-86, 1983
New bubble garnet films with orthorhombic anisotropy, (YTmGdBi)<sub>3</sub>(FeGa)<sub>5</sub>O<sub>12</sub>, (YTmEuBi)<sub>3</sub>(FeGa)<sub>5</sub>O<sub>12</sub>, (YTmSmBi)<sub>3</sub>(FeGa)<sub>5</sub>O<sub>12</sub> and (YTmLaBi)<sub>3</sub>(FeGa)<sub>5</sub>O<sub>12</sub>, have been epitaxially grown on (110) GGG substrates. Although a large in-plane anisotropy <i>K</i><sub>p</sub> of 2∼4×10<sup>4</sup> erg/cm<sup>3</sup> is induced in YTmEu and YTmSm films, the uniaxial anisotropy <i>K</i><sub>u</sub> obtained is not large enough to be used for bubble materials. In YTmGd and YTmLa films, <i>K</i><sub>u</sub> is of almost the same magnitude as <i>K</i><sub>p</sub> with a value of 1.0∼1.5×10<sup>4</sup> erg/cm<sup>3</sup>. The wall dynamics has been investigated by stripe domain transport method. For YTmLa films, the wall mobility μ is ∼22 m/sOe, the peak velocity <i>V</i><sub>p</sub> is ∼120 m/s and the coercive force <i>H</i><sub>c</sub> is ∼0.7Oe. These characteristics may be useful for current access devices.