Direct observation of magnetization reversal of epitaxial MnAs films |
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| Authors: | Takashi Manago Hiro Akinaga |
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| Institution: | Research Consortium for Synthetic Nano-Function Materials Project (SYNAF), Nanotechnology Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan |
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| Abstract: | The magnetization reversal of MnAs  epitaxial films on GaAs (0 0 1) substrates was investigated using a Kerr microscope. The direct observation of the change in domain structure under magnetic fields revealed characteristic magnetization reversal process of MnAs films with a ladder-type domain structure. The nucleus of the magnetization reversal region appears and propagates to neighboring α-MnAs lines, and then the ladder-type structures cover all over the surface. Finally the domain wall displacement occurs to expand the domain. The change in magnetic domain reflects the characteristic ridge/groove structures of MnAs films. |
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| Keywords: | Alloy Gallium arsenide Magnetic measurements Single crystal surfaces Magnetic films Magnetic surface Manganese arsenide Magnetic force microscopy Magneto-optical Kerr effect |
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