Metallization of La1/3NbO3 by lithium incorporation

A. Yamamoto; H. Uchiyama; S. Tajima

doi:10.1016/j.materresbull.2004.05.005

Metallization of La_1/3NbO₃ by lithium incorporation

A. Yamamoto, H. Uchiyama, S. Tajima

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Lithium ion was successfully introduced into La_1/3NbO ₃ with an A-site-deficient perovskite-type structure. The crystal structure and transport properties of La_1/3Li_xNbO ₃ were investigated as a function of Li content (x = 0-0.59). The lattice parameters of La_1/3Li_xNbO₃ 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, Nb_3d⁴⁺ peaks appeared in addition to Nb_3d⁵⁺ 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 _1/3Li_0.59NbO₃ down to 1.8K.

Original language	English
Pages (from-to)	1691-1699
Number of pages	9
Journal	Materials Research Bulletin
Volume	39
Issue number	11
DOIs	https://doi.org/10.1016/j.materresbull.2004.05.005
Publication status	Published - 2004 Sep 1
Externally published	Yes

Keywords

A. Oxides
C. Photoelectron spectroscopy
D. Crystal structure
D. Electrical properties

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.materresbull.2004.05.005

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title = "Metallization of La1/3NbO3 by lithium incorporation",

abstract = "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.",

keywords = "A. Oxides, C. Photoelectron spectroscopy, D. Crystal structure, D. Electrical properties",

author = "A. Yamamoto and H. Uchiyama and S. Tajima",

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AU - Yamamoto, A.

AU - Uchiyama, H.

AU - Tajima, S.

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

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KW - D. Electrical properties

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