Magnetic domain observation of FeCo thin films fabricated by alternate monoatomic layer deposition

作者：Ohtsuki T^*; Kojima T; Kotsugi M; Ohkochi T; Mizuguchi M; Takanashi K

来源：Journal of Applied Physics, 2014, 115(4): 043908.

DOI：10.1063/1.4862910

FeCo thin films are fabricated by alternate monoatomic layer deposition method on a Cu3Au buffer layer, which in-plane lattice constant is very close to the predicted value to obtain a large magnetic anisotropy constant. The variation of the in-plane lattice constant during the deposition process is investigated by reflection high-energy electron diffraction. The magnetic domain images are also observed by a photoelectron emission microscope in order to microscopically understand the magnetic structure. As a result, element-specific magnetic domain images show that Fe and Co magnetic moments align parallel. A series of images obtained with various azimuth reveal that the FeCo thin films show fourfold in-plane magnetic anisotropy along < 110 > direction, and that the magnetic domain structure is composed only of 90 degrees wall.

• 出版日期2014-1-28