Correlation of structural distortion with magnetic properties in electron-doped Ca(0.9)R(0.1)MnO(3) perovskites (R=rare-earth)

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	Correlation of structural distortion with magnetic properties in electron-doped Ca(0.9)R(0.1)MnO(3) perovskites (R=rare-earth)
	Y. Wang; Y. Sui; X. J. Wang; W. H. Su; X. Y. Liu
	2010
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	108 期号:6
摘要	A series of electron-doped orthorhombic-perovskite manganites Ca(0.9)R(0.1)MnO(3) (R=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Yb) are synthesized for a systematic study of their crystal structure and magnetic properties. The structural distortions, in terms of the average Mn-O-Mn bond angle theta(Mn-O-Mn) and Mn-O bond length d(Mn-O), are characterized as a function of the A-site ionic size. Two degenerate vibration modes Q(2) and Q(3) are used for describing the bond length splitting and the evolution of the octahedral-site distortion. With R(3+) doping, the magnetization increases markedly at low temperatures, which can be attributed to the formation of ferromagnetic clusters in the antiferromagnetic matrix. Both low temperature magnetization and paramagnetic susceptibility vary with the radius of R(3+) ion and enhanced ferromagnetic domain is found in Ca(0.9)Ho(0.1)MnO(3). The Neel temperature T(N), varying from 100 to 116 K, is strongly dependent on the crystal structural distortions and can be well described as functions of three structural parameters theta(Mn-O-Mn), d(Mn-O), and A-site cation size variance sigma(2). The best size matching between Dy(3+) and Ca(2+) leads to the highest T(N) in Ca(0.9)Dy(0.1)MnO(3). (C) 2010 American Institute of Physics. [doi:10.1063/1.3481419]
部门归属	[wang, yang; wang, xianjie; su, wenhui] harbin inst technol, ccmst, dept phys, harbin 150001, peoples r china. [wang, yang] nanyang technol univ, sch phys & math sci, div phys & appl phys, singapore 637371, singapore. [sui, yu] acad sinica, int ctr mat phys, shenyang 110015, peoples r china. [liu, xiaoyang] jilin univ, coll chem, state key lab inorgan synth & preparat chem, changchun 130012, peoples r china.;wang, y (reprint author), harbin inst technol, ccmst, dept phys, harbin 150001, peoples r china;suiyu@hit.edu.cn
关键词	Phase-separation Double Exchange Magnetoresistance Manganites Camno3 La Transition Manganates Bandwidth Physics
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31541
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Wang,Y. Sui,X. J. Wang,et al. Correlation of structural distortion with magnetic properties in electron-doped Ca(0.9)R(0.1)MnO(3) perovskites (R=rare-earth)[J]. Journal of Applied Physics,2010,108(6).
APA	Y. Wang,Y. Sui,X. J. Wang,W. H. Su,&X. Y. Liu.(2010).Correlation of structural distortion with magnetic properties in electron-doped Ca(0.9)R(0.1)MnO(3) perovskites (R=rare-earth).Journal of Applied Physics,108(6).
MLA	Y. Wang,et al."Correlation of structural distortion with magnetic properties in electron-doped Ca(0.9)R(0.1)MnO(3) perovskites (R=rare-earth)".Journal of Applied Physics 108.6(2010).