Antiferromagnetism in hcp Iron-Manganese Alloys
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概要
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Antiferromagnetism in hcp Fe-Mn alloys (17.8, 25.9 and 28.6 at %Mn) was investigated by means of Mossbauer effect and neutron diffraction measurements. Neel temperatures and internal magnetic fields at 0°K were determined to be 230°K and 160kG, respectively, over the composition range of the measured alloys. Consequently, hcp alloys have weaker internal magnetic fields and lower Neel temperatures than the fcc modefications. In the neutron diffractions on powder and sheets with preferred orientation of hcp Fe_<0.714>Mn_<0.289>, only (001) magnetic reflection was found. The averaged magnetic moment was evaluated to be 0.25_μB assuming the antiferromagnetic stacking of ferromagnetic (001) sheets. Isomer shifts relative to bcc Fe and quadrupole splittings of hcp alloys are extrapolated to the zero Mn concentration to be -0.20mm/sec and 0.14mm/sec, respectively. The results are discussed in connection with magnetism in hcp Fe.
- 社団法人日本物理学会の論文
- 1971-07-05
著者
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Mekata Mamoru
Department Of Applied Physics Faculty Of Engineering Fukui University
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Ohno Hideo
Department Of Chemistry Faculty Of Science Kyoto University:(present Address) Japan Atomic Energy Re
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Ohno Hideo
Department Of Chemistry Faculty Of Science Kyoto University
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