NUCLEAR MAGNETIC-RELAXATION AND IONIC-CONDUCTIVITY IN LINASO4

被引：17

作者：

KANASHIRO, T ^{[1
]}

YAMANISHI, T ^{[1
]}

KISHIMOTO, Y ^{[1
]}

OHNO, T ^{[1
]}

MICHIHIRO, Y ^{[1
]}

NOBUGAI, K ^{[1
]}

机构：

[1] OSAKA UNIV,INST SCI & IND RES,IBARAKI,OSAKA 567,JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1994年 / 63卷 / 09期

关键词：

SUPERIONIC CONDUCTOR; NUCLEAR RELAXATION RATE; VACANCY DIFFUSION; IONIC CONDUCTIVITY; ALKALI SULFATE;

D O I：

10.1143/JPSJ.63.3488

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The temperature dependence of the spin-lattice relaxation time for Li-7 has been measured in a single crystal of LiNaSO4 over the temperature range of 450 K-770 K. The result can be explained by a mechanism of vacancy diffusion. The activation energies for the hopping of Li+ and Na+ vacancies are estimated to be E(1)=0.70 eV and E(2)=1.20 eV, respectively. In addition, the ionic conductivity has been measured as a function of frequency from 500 Hz to 20 MHz and the value of 1.59 eV is deduced as the activation energy, E(m) for the ionic diffusion in the extrinsic region. These values of E(1), E(2), E(m) are well compared with the corresponding values of 0.70 eV, 1.24 eV and the intermediate value between 1.74 eV for Li+ and 1.90 eV for Na+ ions evaluated from the previous NMR measurements.

引用

页码：3488 / 3493

页数：6

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