Nuclear Magnetic Relaxation in Antiferromagnetic α-Mn Metal near the Neel Temperature
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概要
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Nuclear magnetic resonance studies on Mn^<55> in α-Mn metal and Mn-Cr alloys which have an α-Mn phase in the temperature range around the Neel transition point, have been made by a pulse method. Nuclear spin-spin relaxation time T_2 has shown discontinuity at the Neel temperature, T_N. The T_2 values are well proportional to (T_N - T)^<1/3> in antiferromagnetic state and to (T - T_N)^<2/8> in paramagnetic state. The measured values of T_N in α-Mn metal, Mn- 1 at.% Cr, and Mn- 2 at.% Cr alloys determined by nuclear magnetic resonance method are 95.0±1.0°K, 81.6±1.0°K, and 72.3±0.5°K, respectively. Mn- 5 at.% Cr alloy did not show an antiferromagnetic behaviour even at 4.2°K. T_N decreases with Cr content, but increases with Fe content. These results suggest that the rigid-band model is a good approximation for these metal alloy systems.
- 社団法人日本物理学会の論文
- 1967-04-05
著者
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Masuda Yoshika
Department Of Liberal Arts Aichi Gakuin University
-
Taki Toshihiko
Department Of Electrical Engineering Kobe University
-
Masuda Yoshika
Department Of Physics Kobe University:(present)department Of Physics Faculty Of Science Nagoya Unive
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