Magnetic properties in polycrystalline and single crystal Ca-doped LaCoO3

Authors

R Zeng, University of WollongongFollow
J C. Debnath, University of WollongongFollow
Dapeng Chen, University of WollongongFollow
P Shamba, University of WollongongFollow
Jianli Wang, University of WollongongFollow
S J. Kennedy, Bragg Institute ANSTO Australia
S J. Campbell, University of New South WalesFollow
Tania M. Silver, University of WollongongFollow
S. X. Dou, University of WollongongFollow

RIS ID

37706

Publication Details

Zeng, R., Debnath, J. C., Chen, D. P., Shamba, P., Wang, J. L., Kennedy, S. J., Campbell, S. J., Silver, T. & Dou, S. X. (2011). Magnetic properties in polycrystalline and single crystal Ca-doped LaCoO3. Journal of Applied Physics, 109 (7), 1-3.

Abstract

Polycrystalline (PC) and single crystalline (SC) Ca-doped LaCoO₃ (LCCO) samples with the perovskite structure were synthesized by conventional solid-state reaction and the floating-zone growth method. We present the results of a comprehensive investigation of the magnetic properties of the LCCO system. Systematic measurements have been conducted on dc magnetization, ac susceptibility, exchange-bias, and the magnetocaloric effect. These findings suggest that complex structural phases, ferromagnetic (FM), and spin-glass/cluster-spin-glass (CSG), and their transitions exist in PC samples, while there is a much simpler magnetic phase in SC samples. It was also of interest to discover that the CSG induced a magnetic field memory effect and an exchange-bias-like effect, and that a large inverse irreversible magnetocaloric effect exists in this system.

Grant Number

ARC/DP0879070

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0879070