Influence of oxygen stoichiometry on the electronic properties of La4Ni3O10±δ

被引：29
作者：
Carvalho, MD
Cruz, MM
Wattiaux, A
Bassat, JM
Costa, FMA
Godinho, M
机构：
[1] Univ Lisbon, Fac Ciencias, Dept Quim & Bioquim, CiTecMat, P-1749016 Lisbon, Portugal
[2] Univ Lisbon, Fac Ciencias, Dept Fis, CiTecMat, P-1749016 Lisbon, Portugal
[3] ICMCB, F-33608 Pessac, France
来源：
JOURNAL OF APPLIED PHYSICS | 2000年 / 88卷 / 01期
关键词：
D O I：
10.1063/1.373693
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Some different oxygen content La4Ni3O10+delta (delta=0.02,0.12,-0.22) compounds were prepared in order to study the influence of Ni3+ content on the electronic properties. A metal-metal transition was detected at 140 K for the as-prepared (La4Ni3O10.02) and reduced (La4Ni3O9.78) compounds. From the electrical conductivity, Seebeck coefficient and magnetic studies of the different samples, oxygen stoichiometry was found to be a critical parameter in defining the existence of a less conductive low temperature state. The results are interpreted assuming the existence of charge order in the nickel oxide planes of the layered perovskite-type structure. (C) 2000 American Institute of Physics. [S0021-8979(00)05613-9].
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页码：544 / 549
页数：6
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