Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (4): 47501-047501.doi: 10.1088/1674-1056/22/4/047501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

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

胡新波a, 胡令a, 罗轩a, 赵邦传a, 孙玉平a b   

  1. a Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
    b High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China
  • 收稿日期:2012-06-25 修回日期:2012-09-28 出版日期:2013-03-01 发布日期:2013-03-01
  • 基金资助:
    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).

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

Hu Xin-Bo (胡新波)a, Hu Ling (胡令)a, Luo Xuan (罗轩)a, Zhao Bang-Chuan (赵邦传)a, Sun Yu-Ping (孙玉平)a b   

  1. a Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
    b High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2012-06-25 Revised:2012-09-28 Online:2013-03-01 Published:2013-03-01
  • Contact: Hu Ling, Sun Yu-Ping E-mail:huling@issp.ac.cn; ypsun@issp.ac.cn
  • Supported by:
    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).

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摘要： 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 Sm1-xCexVO3. 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.

关键词: perovskite vanadate, orbital/spin ordering, electrical properties

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 Sm1-xCexVO3. 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.

Key words: perovskite vanadate, orbital/spin ordering, electrical properties

中图分类号:  (Orbital, charge, and other orders, including coupling of these orders)

  • 75.25.Dk
75.30.-m (Intrinsic properties of magnetically ordered materials) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)