Ferroelastic Property and Nuclear Magnetic Resonance in a K_3H(SO_4)_2 Single Crystal(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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概要

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• The temperature dependences of the stress-strain hysteresis and of the optical polarizing microscopy results in the K_3H(SO_4)_2 single crystal grown by using the slow evaporation method were measured. From these, it was determined that the K_3H(SO_4)_2 single crystal underwent a ferroelastic phase transition near T_c =481 K. Also, we studied the ferroelastic domain switching due to external stress in K_3H(SO_4)_2 single crystals. The ferroelastic domain switching stress due to the saturation effect was about 0.3 Mpa. This means that when an external stress of 0.3 Mpa is applied to K_3H(SO_4)_2 crystals, a transformation occurs from the twin-domain state to the single-domain state. This crystal easily transforms to a single domain under the influence of a slight external stress. In addition, the spin-lattice relaxation rates for ^1H and ^<39>K nuclei in K_3H(SO_4)_2 single crystals were determined as a function of temperature. The spin-lattice relaxation of ^1H cannot be represented by the Bloembergen-Purcell-Pound (BPP) function, so is not related to HSO_4 motion. The recovery traces of ^<39>K, which predominantly undergoes quadrupole relaxation, can be represented by a linear combination of two exponential functions. The temperature dependences of the relaxation rates for ^<39>K can be described with a simple power law T_1^<-1> = AT^2. The spin-lattice relaxation rates for the ^<39>K nucleus in K_3H(SO_4)_2 crystals are in accordance with a Raman nrocess dominated bv a nhonon mechanism.

• 社団法人日本物理学会の論文
• 2004-10-15

著者

• JEONG Se-Young

  Department of Physics, Pusan National University

• Jeong S‐y

  Comtecs Ltd. Daegu Kor

• Jeong Se-young

  Department Of Physics Pusan National University

• Jeong Se-young

  Department Of Physics And Research Center For Dielectric And Advanced Matter Physics Pusan National

• Lim A

  Jeonju Univ. Jeonju Kor

• LIM Ae

  Department of Physics, Jeonju University

• JANG Tae-Gab

  Department of Polymer Science & Engineering, Kumoh National Institute of Technology

• CHANG Jin-Hae

  Department of Polymer Science & Engineering, Kumoh National Institute of Technology

• Lim Ae

  Department Of Physics Jeonju University

• Jang Tae-gab

  Department Of Polymer Science & Engineering Kumoh National Institute Of Technology

• Chang Jin-hae

  Department Of Polymer Science & Engineering Kumoh National Institute Of Technology

• Lin Ae

  Department Of Physics Jeonju University

• Jeong Se-young

  Department Of Nano-science And Technology Pusan National University

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