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
胡新波a, 胡令a, 罗轩a, 赵邦传a, 孙玉平a b
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
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.
中图分类号: (Orbital, charge, and other orders, including coupling of these orders)