Different effects of Ce-doping on orbital and spin ordering in perovskite vanadate Sm1-xCexVO3

doi:10.1088/1674-1056/22/4/047501

Abstract The effects of Ce-doping on the phase transition of the orbital/spin ordering (OO/SO) are studied through the structural, magnetic, and electrical transport measurements of perovskite vanadate Sm_1-xCe_xVO₃. The measurements of structure show that the cell volume decreases as x ≤ 0.05, and then increases as Ce-doping level increases further. The OO state exists but is suppressed progressively in the sample with x ≤ 0.2 and disappears as x>0.2. The temperature at which the C-type SO transition is present increases monotonically with Ce-doping level increasing. The temperature dependence of resistivity for each of all samples shows a semiconducting transport behavior and the transport can be well described by the thermal activation model. The activation energy first decreases as x ≤ 0.2, and then increases for further doping. The obtained results are discussed in terms of the mixed-valent state of the doped-Ce ions.

Keywords: perovskite vanadate orbital/spin ordering electrical properties

Received: 25 June 2012
Revised: 28 September 2012
Accepted manuscript online:

PACS:	75.25.Dk	(Orbital, charge, and other orders, including coupling of these orders)
	75.30.-m	(Intrinsic properties of magnetically ordered materials)
	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)

Fund: Project supported by the National Key Basic Research Program of China (Grant No. 2011CBA00111) and the National Natural Science Foundation of China (Grant Nos. 10974205, 11104273, and 11004193).

Corresponding Authors: Hu Ling, Sun Yu-Ping
E-mail: huling@issp.ac.cn; ypsun@issp.ac.cn

Cite this article:

Hu Xin-Bo (胡新波), Hu Ling (胡令), Luo Xuan (罗轩), Zhao Bang-Chuan (赵邦传), Sun Yu-Ping (孙玉平) Different effects of Ce-doping on orbital and spin ordering in perovskite vanadate Sm_1-xCe_xVO₃ 2013 Chin. Phys. B 22 047501

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Different effects of Ce-doping on orbital and spin ordering in perovskite vanadate Sm1-xCexVO3

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Different effects of Ce-doping on orbital and spin ordering in perovskite vanadate Sm_1-xCe_xVO₃