Magnetic polaron conduction above the Curie temperature in Fe-doped Pr0.75Sr0.25MnO3

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	Magnetic polaron conduction above the Curie temperature in Fe-doped Pr0.75Sr0.25MnO3
	J. M. Liu; T. Yu; Q. Huang; J. Li; Z. X. Shen; C. K. Ong
	2002
发表期刊	Journal of Physics-Condensed Matter
ISSN	0953-8984
卷号	14 期号:6 页码:L141-L147
摘要	The transport behaviour of Fe-doped Pr0.75Sr0.25MnO3 (PSMFO, Fe = 0.05) is studied by zero-field conductivity probing and Raman spectroscopy. It is revealed that the conductivity of PSMFO above T-m the metal-insulator transition point, shows variable-range-hopping, behaviour instead of the small-polaron mode. The B-2g Raman line at 630 cm(-1) arising from the Mn-O bending and stretching modes undergoes anomalous softening as the temperature is lowered from ambient temperature, indicating a magnetic ordering sequence above T-m. It is demonstrated that the electronic conduction of PSMFO above T-m is governed by magnetic polarons embedded in a matrix of paramagnetic insulating phase.
部门归属	nanjing univ, solid state microstruct lab, nanjing 210093, peoples r china. huazhong univ sci & technol, lab laser technol, wuhan 430074, peoples r china. natl univ singapore, dept phys, singapore 119260, singapore. chinese acad sci, int ctr mat sci, shenyang 110016, peoples r china.;liu, jm (reprint author), nanjing univ, solid state microstruct lab, nanjing 210093, peoples r china
关键词	Colossal Magnetoresistance Thin-films Resistivity
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36348
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. M. Liu,T. Yu,Q. Huang,et al. Magnetic polaron conduction above the Curie temperature in Fe-doped Pr0.75Sr0.25MnO3[J]. Journal of Physics-Condensed Matter,2002,14(6):L141-L147.
APA	J. M. Liu,T. Yu,Q. Huang,J. Li,Z. X. Shen,&C. K. Ong.(2002).Magnetic polaron conduction above the Curie temperature in Fe-doped Pr0.75Sr0.25MnO3.Journal of Physics-Condensed Matter,14(6),L141-L147.
MLA	J. M. Liu,et al."Magnetic polaron conduction above the Curie temperature in Fe-doped Pr0.75Sr0.25MnO3".Journal of Physics-Condensed Matter 14.6(2002):L141-L147.