Study of Slow Motion of Impurity-Vacancy Complexes in NaCl Crystals by Nuclear Magnetic Resonance

スポンサーリンク

概要

• 論文の詳細を見る

• The nuclear spin relaxation times T_1 and T_<1p> for Na in doped NaCl crystals, along the static and rf field, respectively, have been measured below 110℃ to study slow thermal motion of the bound positive ion vacancy around the divalent impurity ions Cd^<++>, Ca^<++>, and Sr^<++> Below 110℃ almost all vacancies form complexes with divalent ions. Slichter's formula for T_<1p> is applicable to the present case where the electric quadrupole interaction determines the local field. Activation energies for the jump of a vacancy in a nearest-neighbor Na site to a next nearest-neighbor site have been measured accurately; 0.64±0.03 eV for NaCl:Cd, 0.71±0.05 eV for NaCl:Ca, and 0.74±0.03 eV for NaCl:Sr. These values agree with the results of dielectric relaxation and ionic thermocurrent measurements. Motion of vacancy-impurity dipoles in a higher complex (probably the pentamer) causes complicated temperature dependence of relaxation times in Ca-doped NaCl.

• 社団法人日本物理学会の論文
• 1968-12-05

著者

• Hanabusa Mitsugu

  Faculty Of Engineering Science Osaka University

• KUMANO Masahiro

  Faculty of Engineering Science, Osaka University

• Kumano Masahiro

  Faculty Of Engineering Science Osaka University:(present Address) Matsushita Research Institute Toky

関連論文

• Study of Slow Motion of Impurity-Vacancy Complexes in NaCl Crystals by Nuclear Magnetic Resonance
• Acoustic Excitation of Nuclear Magnetic Energy Levels in the Rotating Frame

スポンサーリンク