Lanthanide contraction effect on crystal structures, magnetic, and dielectric properties in ordered double perovskites LnPbCoSbO(6) (Ln = La, Pr, Nd)

	Lanthanide contraction effect on crystal structures, magnetic, and dielectric properties in ordered double perovskites LnPbCoSbO(6) (Ln = La, Pr, Nd)
	Han,L. ; Bai,Y.J. ; Meng,F.Z. ; Liu,X.J. ; Yao,C.G. ; Meng,J.L. ; Liang,Q.S. ; Wu,X.J. ; Meng,J.
刊名	journal of applied physics
	2014
卷号	115 期号:16 页码:164105
关键词	ROOM-TEMPERATURE MAGNETORESISTANCE ANTIFERROMAGNETISM LA2NIMNO6 SR2COSBO6 COBALT
通讯作者	liu,xj
英文摘要	the crystal structures, magnetic, and dielectric properties for the ordered double perovskites lnpbcosbo(6) (ln -la, pr, nd) have been investigated. the crystal structure has been solved by rietveld refinements of x-ray diffraction data in the monoclinic space group p2(1)/n (no. 14). the co2+ and sb5+ ions are almost fully ordered over the b-site, and the octahedral framework displays significant tilting distortion according to the glazer's tilt system a(-)a(-)c(+). as the result of lanthanide contraction from la3+ to nd3+, the b-site sublattice distortions become stronger accompanying with the reduction of the tolerance factor and coordination number. the magnetization measurements show an antiferromagnetic ordering with large effective magnetic moments (mu(eff)) suggesting that the orbital component is significant. the maximum values of isothermal magnetization increase with the decrease in radii of rare earth ions, which is attributed to the weakening of antiferromagnetic interaction via co2+-o-sb5+-o-co2+ paths. the dielectric constants present frequency dependence and monotonically decrease with the ionic radii reduction from la3+ to nd3+ due to the suppression of electron transfer. these results indicate that the magnetic and dielectric properties can be tuned by controlling the degree of lattice distortion, which is realized by introducing different ln(3+) ions at the a-site. (c) 2014 aip publishing llc.
收录类别	SCI
语种	英语
公开日期	2015-10-27
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/57433]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Han,L.,Bai,Y.J.,Meng,F.Z.,et al. Lanthanide contraction effect on crystal structures, magnetic, and dielectric properties in ordered double perovskites LnPbCoSbO(6) (Ln = La, Pr, Nd)[J]. journal of applied physics,2014,115(16):164105.
APA	Han,L..,Bai,Y.J..,Meng,F.Z..,Liu,X.J..,Yao,C.G..,...&Meng,J..(2014).Lanthanide contraction effect on crystal structures, magnetic, and dielectric properties in ordered double perovskites LnPbCoSbO(6) (Ln = La, Pr, Nd).journal of applied physics,115(16),164105.
MLA	Han,L.,et al."Lanthanide contraction effect on crystal structures, magnetic, and dielectric properties in ordered double perovskites LnPbCoSbO(6) (Ln = La, Pr, Nd)".journal of applied physics 115.16(2014):164105.