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Title: Magnetic properties in polycrystalline and single crystal Ca-doped LaCoO3
Authors: Zeng, R
Debnath, JC
Chen, DP
Shamba, P
Wang, JL
Kennedy, SJ
Campbell, SJ
Silver, T
Dou, SX
Keywords: Magnetic properties
Spin glass state
Crystal structure
Phase studies
Issue Date: 1-Apr-2011
Publisher: American Physical Society
Citation: 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, Vol. 109(7); Art. No. 07E146. doi:10.1063/1.3562518
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.(C) 2011 American Institute of Physics. [doi:10.1063/1.3562518]
Gov't Doc #: 3818
ISSN: 0021-8979
Appears in Collections:Journal Articles

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