Spin-glass transition in single-crystal BiFeO3

被引：279

作者：

Singh, Manoj K. ^{[1
]}

Prellier, W. ^{[2
]}

Singh, M. P. ^{[2
]}

Katiyar, Ram S. ^{[1
]}

Scott, J. F. ^{[3
]}

机构：

[1] Univ Puerto Rico, Dept Phys, Rio Piedras, PR 00931 USA

[2] ENSICAEN, CNRS, Lab CRISMAT, UMR 6508, F-14050 Caen, France

[3] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.77.144403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic properties of BiFeO3 (BFO) single crystals with rhombohedral symmetry (R3c) were measured in the temperature range of 4.2-350 K. Zero field cooled (ZFC) and field cooled magnetization curves split below 250 K with a sharp cusp around 50 K in the ZFC curves revealing spin-glass behavior in BFO single crystals. The observed coercive field increases with decreasing temperature, suggesting week ferromagnetism below similar to 10 K and spin glass behavior below similar to 120 K. The cusps around the freezing temperature [T-f(omega)] which are frequency dependent confirm the spin-glass behavior in BFO single crystals with spin freezing temperature (T-SG=29.4 +/- 0.2 K). The critical exponent z nu=1.38 agrees rather well with experimental values in LaMn0.5Fe0.5O3 (z nu=1.0) [K. De , J. Appl. Phys. 99, 13908 (2006)] and the mean field theory (z nu=2.0) of Kirkpatrick and Sherrington [Phys. Rev. B 17, 4384 (1970)].

引用

页数：5

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