Nuclear Spin-Lattice Relaxation in Superconducting Mixed State
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概要
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The nuclear spin-lattice relaxation time T_1 of V^<51> in a type II superconductor V_3Sn in the mixed state has been measured. In the case of T_c(0)>T_(H)>0.6T_c(0), abrupt decrease of T_1 appears at the critical temperature corresponding to the magnetic field in which T_1 was measured, T_c(H), and then increases gradually. In this case of low magnetic field and high temperatures near T_c(0), the temperature variation of T_1 shows the behavior predicted by a Bardeen-Cooper-Schrieffer (BCS) theory of superconductivity. In the case of T_c(H)<0.6T_c(0), just below T_c(H) corresponding to that field, T_1 shows no minimum but increases monotonically. These behaviors in the case of high magnetic field and low temperatures can be understood quantitatively on the basis of the theory of gapless superconductivity.
- 社団法人日本物理学会の論文
- 1969-02-05
著者
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Masuda Yoshika
Department Of Liberal Arts Aichi Gakuin University
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Okubo Noriaki
Department Of Physics Nagoya University
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Okubo Noriaki
Department Of Applied Physics Tokyo University Of Education
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