Acoustic Excitation of Nuclear Magnetic Energy Levels in the Rotating Frame

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概要

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• When crystals are distorted periodically by a vibrating force, transitions take place among nuclear Zeeman levels of Δm=±2 in the rotating frame. This excitation is observed as the reduction in relaxation times of spin-locked magnetization. Unlike ultrasonic excitation in the laboratory frame, the acoustic frequency is low (2_γH_1/2π), and this fact, together with a high sensitivity to a strain, enables one to determine the electric field gradient-elastic tensors s accurately. These effects have been demonstrated for Na in NaCl single crystals. Measurements for several orientations of the force and the external magnetic field have yielded S_<11>=(2.8±0.3)×10^<15> statcoul/cm^3 and S_<44>=-(0.81±0.08)×10^<15> statcoul/cm^3. These values are explained by a consideration of overlap effects in addition to ionic point-charges.

• 社団法人日本物理学会の論文
• 1969-04-05

著者

• Yamaguchi Takashi

  Faculty of Life and Environmental Science, Shimane University

• Hanabusa Mitsugu

  Faculty Of Engineering Science Osaka University:(present Address) Scientific Lab. Ford Motor Co.

• Hanabusa Mitsugu

  Faculty Of Engineering Science Osaka University

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• Acoustic Excitation of Nuclear Magnetic Energy Levels in the Rotating Frame

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