Quadrupole-Nuclear Relaxation Induced by Dynamic Disorders

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概要

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• The ^<35>Cl NQR spin-lattice relaxation times T_<1Q> in Ni(H_2O)_6SnCl_6 and Mg(H_2O)_6SnCl_6 are determined mainly by the fluctuations of the electronic magnetic fields caused by electron-spin flips and of the electric field gradients due to lattice vibrations, respectively. In addition, we have observed a double minimum and a dip in T_<1Q> for the Ni and Mg compound, respectively. This arises from the fluctuation of the electric field gradients at the chlorine nuclei caused by reorientational motions of the nearby cations that result in slight dynamic disorders of the proton sites. This type of relaxation mechanism has not been observed extensively so far, because the disorder in question is limited only to such one as can affect the NQR relaxation but at the same time does not prevent us from observing the NQR signals. The nature of the relaxation mechanism is discussed.

• 社団法人日本物理学会の論文
• 1994-10-15

著者

• HORIUCHI Keizo

  Division of General Education, University of the Ryukyuus

• Horiuchi Keizo

  Division Of General Education University Of The Ryukyus

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• Structural Phase Transitions in (C_2H_5NH_3)_2- and (n-C_4H_9NH_3)_2ZnBr_4
• X-Ray Diffraction and ^CINQR Studies of Bis-2-picolinium Hexachlorostannate
• Quadrupole-Nuclear Relaxation Induced by Dynamic Disorders

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