Specific heat of single-crystal PrMnO3

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	Specific heat of single-crystal PrMnO3
	J. G. Cheng; Y. Sui; X. J. Wang; Z. G. Liu; J. P. Miao; X. Q. Huang; Z. Lu; Z. N. Qian; W. H. Su
	2005
发表期刊	Journal of Physics-Condensed Matter
ISSN	0953-8984
卷号	17 期号:37 页码:5869-5879
摘要	The specific heat of single-crystal PrMnO3 was investigated from 2 to 200 K under different magnetic fields up to 8 T. A Schottky-like anomaly observed at low temperature was gradually shifted to higher temperatures by magnetic fields. The first four singlets of the Pr3+ H-3(4) ground multiplet in PrMnO3 are given for the first time by fitting the specific heat of Pr3+ ions below 40 K under zero field. By analysing the field dependence of the first singlet of Pr3+ ions, the Pr-Mn exchange field is found to be negligible, which is consistent with the magnetic anisotropy of Pr3+ ions revealed in the magnetic measurement. At T-N, the cooperative antiferromagnetic ordering of Mn3+ spins shows up as lambda-shaped anomaly, which is lowered and broadened in magnetic fields. The magnetic entropy near TN is estimated by subtracting the contributions to specific heat from Pr3+ ions and lattice vibrations. It was found that the fraction of entropy above TN in the total entropy increases with the fields due to the enhancement of spin fluctuations by magnetic field.
部门归属	harbin inst technol, ccmst, dept appl phys, harbin 150001, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;su, wh (reprint author), harbin inst technol, ccmst, dept appl phys, harbin 150001, peoples r china;suiyu@hit.edu.cn
关键词	Temperature Specific-heat Field Lattice
URL	查看原文
WOS记录号	WOS:000232550700023
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34825
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. G. Cheng,Y. Sui,X. J. Wang,et al. Specific heat of single-crystal PrMnO3[J]. Journal of Physics-Condensed Matter,2005,17(37):5869-5879.
APA	J. G. Cheng.,Y. Sui.,X. J. Wang.,Z. G. Liu.,J. P. Miao.,...&W. H. Su.(2005).Specific heat of single-crystal PrMnO3.Journal of Physics-Condensed Matter,17(37),5869-5879.
MLA	J. G. Cheng,et al."Specific heat of single-crystal PrMnO3".Journal of Physics-Condensed Matter 17.37(2005):5869-5879.