NMR study of one-dimensional ionic conductor with hollandite-type structure. II. Frequency dependence of spin-lattice relaxation time of <sup>27</sup>Al期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

按检索

NMR study of one-dimensional ionic conductor with hollandite-type structure. II. Frequency dependence of spin-lattice relaxation time of ²⁷Al

Authors:	Y Onoda Y Fujiki M Takigawa H Yasuoka S Yoshikado T Ohachi I Taniguchi

Institution:	National Institute for Research in Inorganic Materials, 1-1, Namiki, Sakura-mura, Niihari-gun, Ibaraki 305, Japan;The Institute for Solid State Physics, The University of Tokyo, Minato-ku, Tokyo 106, Japan;Department of Electronics, Doshisha University, Kyoto 602, Japan

Abstract:	Frequency dependence of spin-lattice relaxation time T₁ of ²⁷Al in one-dimensional K⁺ ion conductor, K-Al-priderite, was measured at 45 K in the frequency range from 10.1 MHz to 55 MHz. It is found that T₁ is proportional to ω^1.49±0.05 and agrres well with the $ω^{34}$ dependence derived by the continuum diffusion model. The intrinsic activation energy is determined to be 0.058 eV by doubling the slope E_NMR=0.029 eV of the d(ln T₁)/dT curve in the low temperature region. The frequency dependence of T₁ in the high temperature region measured in the frequency range from 11.5 MHz to 20.8 MHz shows a tendency that the frequency dependence becomes smaller than the $ω^{12}$ dependence as temperature is raised above 450 K.

Keywords:	Author to whom correspondence should be addressed
本文献已被 ScienceDirect 等数据库收录！