TY - JOUR

T1 - Transport properties of LaF3 fast ionic conductor studied by field gradient NMR and impedance spectroscopy

AU - Sinitsyn, V. V.

AU - Lips, O.

AU - Privalov, A. F.

AU - Fujara, F.

AU - Murin, I. V.

N1 - Funding Information: The authors thank Prof. H. Hahn (Institute of Material Sciences, TU Darmstadt) for providing us measuring time at his impedance spectroscopy equipment. The work is supported by the German Science Foundation (DFG) under grant no. FU 308/4.

PY - 2003/7/1

Y1 - 2003/7/1

N2 - The self-diffusion coefficient and the ionic conductivity in LaF3 single crystals are measured over a temperature range from 300 to 1400K. Three thermally activated processes are found in this range. After heating, both the diffusion coefficient and the conductivity of the as-grown samples undergo strong irreversible changes at T<1100K. An activation energy of Ea=1.2eV and a Haven ratio of about 0.1 are determined in the intrinsic region. The mechanism of the ion transport and the effect of thermal treatment are discussed.

AB - The self-diffusion coefficient and the ionic conductivity in LaF3 single crystals are measured over a temperature range from 300 to 1400K. Three thermally activated processes are found in this range. After heating, both the diffusion coefficient and the conductivity of the as-grown samples undergo strong irreversible changes at T<1100K. An activation energy of Ea=1.2eV and a Haven ratio of about 0.1 are determined in the intrinsic region. The mechanism of the ion transport and the effect of thermal treatment are discussed.

KW - D. Defects

KW - D. Transport properties

UR - http://www.scopus.com/inward/record.url?scp=0037989042&partnerID=8YFLogxK

U2 - 10.1016/S0022-3697(03)00050-7

DO - 10.1016/S0022-3697(03)00050-7

M3 - Article

AN - SCOPUS:0037989042

VL - 64

SP - 1201

EP - 1205

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

SN - 0022-3697

IS - 7

ER -