Spin Relaxation Processes via Tunneling Effect of the Li+ Ion in the FA(Li) Centers in Alkali Halide Crystals (Selected Topics in Semiconductor Physics<特集>) -- (Impurity and Disordered States)

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概要

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• Spin relaxation processes of the F_A (Li) centers in KCI and KBr have been studied with an X-band ESR spectroscopy, at liquid He temperatures. It is shown that the longitudinal and transverse spin relaxation processes in the F_A (Li) centers are strongly subjected by the tunneling motion of the Li^+ ion. The spin-lattice relaxation time, called T_1, is anomalously short, and it shows an isotope effect and a quadratic electric field dependence. Especially for the F_A (Li) centers in KBr, T_1 shows a remarkable temperature dependence with a distinguished isotope effect. A theoretical analysis gives the tunneling splitting energy of 6.7 and 3.9 K, and the tunneling probability of 1.0×10^3 and 0.5×10^3 (1/sec), for the F_A (Li^6) and F_A (Li^7) centers in KBr, respectively. The decrease of the transverse relaxation time is also observed at liquid He temperatures: The fact may be closely related to the quenching of ENDOR signals at liquid He temperatures. Theoretical approaches have been reviewed.

• 理論物理学刊行会の論文
• 1975-11-29

著者

• MORI Yuzo

  Department of Precision Science and Technology, Osaka University

• Mori Yoshihisa

  Institute Of Molecular Sciences

• Matsuoka M

  Univ. Tokyo Tokyo Jpn

• Matsuoka Masao

  Department Of Applied Physics Osaka City University:institute De Fisica Universitaria De Sao Paulo

• OHKURA Hiroshi

  Department of Applied Physics,Osaka City University

• WATANABE Tohru

  Department of Industrial Chemistry, Tokyo, Metropolitan University

• SATOH Akio

  Department of Applied Physics, Osaka City University

• Satoh Akio

  Department Of Applied Physics Osaka City University

• OHKURA Hiroshi

  Graduate School of Science and Technology, Niigata University

• Mori Y

  Department Of Physics Division Of Material Science Nagoya University

• Mori Yuzo

  Department Of Applied Physics Faculty Of Engineering Osaka City University

• Watanabe Tohru

  Department Of Industrial Chemistry Faculty Of Technology Tokyo Metropolitan University

• Ohkura H

  Osaka City Univ. Osaka

• Ohkura Hiroshi

  Department Of Applied Physics Osaka City University

• Ohkura H

  Okayama Univ. Science Okayama Jpn

• Ohkura Hiroshi

  Graduate School Of Science And Technology Niigata University

• Watanabe Tohru

  Department Of Applied Physics Osaka City University

• Watanabe Tohru

  Department Of Applied Chemistry Graduate School Of Engineering Tokyo Metropolitan University

• MATSUOKA Masao

  Department of Applied Physics, Osaka City University

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