Room-Temperature Photomagnetic Effect of Fe3Ga4 Grown on GaAs Substrates |
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Authors: | A. T. M. K. Jamil H. Noguchi K. Shiratori T. Kondo H. Munekata |
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Affiliation: | (1) Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, 4259-G2-13 Nagatsuta, Midori-ku Yokohama, 226-8502, Japan |
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Abstract: | Ga–As–Fe composite films prepared by molecular beam epitaxy at 600°C on GaAs(100) substrates with the stacking sequence of [100-nm GaAs/50-nm Fe3Ga2− x As x /100-nm GaAs] exhibit the distinct photo-enhanced magnetization at room temperature. Transmission electron microscopy reveals the formation of metamagnetic Fe3Ga4 grains on the sample surface. Illumination power dependence of the enhanced magnetization has been carefully compared with the antiferromagnetic-type magnetization–temperature (M–T) curve (Neel temperature of T N = 340–390 K), from which we have discussed the existence of photon-mode photo-enhanced magnetization of some sort in addition with the enhancement due to the light-induced heating. |
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Keywords: | GaAs Iron Fe3Ga4 photo-induced magnetism molecular beam deposition |
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