TY - JOUR
T1 - Metallization of La1/3NbO3 by lithium incorporation
AU - Yamamoto, A.
AU - Uchiyama, H.
AU - Tajima, S.
N1 - Funding Information:
The authors indebted to Drs. F. Izumi, T. Kamiyama and R. Dilanian for the useful discussions about the crystal structure. We also thank Dr. S. Takenouchi for chemical analyses of Li. This work was partly supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2004/9/1
Y1 - 2004/9/1
N2 - Lithium ion was successfully introduced into La1/3NbO 3 with an A-site-deficient perovskite-type structure. The crystal structure and transport properties of La1/3LixNbO 3 were investigated as a function of Li content (x = 0-0.59). The lattice parameters of La1/3LixNbO3 with an orthorhombic cell were enlarged with increasing Li content for x ≤ 0.3, and the structure was transformed to a pseudo-tetragonal cell for x = 0.44. The temperature dependence of electrical resistivity gradually changed from insulating to metallic with increasing x, and thermoelectric power measurement indicated that the carriers were electrons. In X-ray photoelectron spectra of the incorporated samples, Nb3d4+ peaks appeared in addition to Nb3d5+ peaks, which was consistent with the change of the transport properties. In spite of the success of metallization, no diamagnetic signal indicative of supercondcutivity was observed in La 1/3Li0.59NbO3 down to 1.8K.
AB - Lithium ion was successfully introduced into La1/3NbO 3 with an A-site-deficient perovskite-type structure. The crystal structure and transport properties of La1/3LixNbO 3 were investigated as a function of Li content (x = 0-0.59). The lattice parameters of La1/3LixNbO3 with an orthorhombic cell were enlarged with increasing Li content for x ≤ 0.3, and the structure was transformed to a pseudo-tetragonal cell for x = 0.44. The temperature dependence of electrical resistivity gradually changed from insulating to metallic with increasing x, and thermoelectric power measurement indicated that the carriers were electrons. In X-ray photoelectron spectra of the incorporated samples, Nb3d4+ peaks appeared in addition to Nb3d5+ peaks, which was consistent with the change of the transport properties. In spite of the success of metallization, no diamagnetic signal indicative of supercondcutivity was observed in La 1/3Li0.59NbO3 down to 1.8K.
KW - A. Oxides
KW - C. Photoelectron spectroscopy
KW - D. Crystal structure
KW - D. Electrical properties
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U2 - 10.1016/j.materresbull.2004.05.005
DO - 10.1016/j.materresbull.2004.05.005
M3 - Article
AN - SCOPUS:3242691382
VL - 39
SP - 1691
EP - 1699
JO - Materials Research Bulletin
JF - Materials Research Bulletin
SN - 0025-5408
IS - 11
ER -