Specific-heat evidence of strong electron correlations and thermoelectric properties of the ferromagnetic perovskite SrCoO3-δ

被引：75

作者：

Balamurugan, S.

Yamaura, K.

Karki, A. B.

Young, D. P.

Arai, M.

Takayama-Muromachi, E.

机构：

[1] Natl Inst Mat Sci, Adv Nano Mat Lab, Tsukuba, Ibaraki 3050044, Japan

[2] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[3] Natl Inst Mat Sci, Computat Mat Sci Ctr, Tsukuba, Ibaraki 3050044, Japan

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.74.172406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A dense pellet of the polycrystalline SrCoO3-delta (0 <=delta < 0.2) was obtained by a high-pressure method, and electronic transport properties of the stoichiometric perovskite were measured. A large electronic specific-heat coefficient was found [45.7(2) mJ mol(-1) K-2], indicating a moderate degree of electrons correlation: the mass enhancement factor was 6.1, which is higher than that for the 4d ferromagnetic perovskite SrRuO3 (4.4). The thermoelectric properties of SrCoO3 were found to be sensitive to band filling, in contrast to those of SrRuO3.

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页数：4

相关论文

共 17 条

[1] X-ray absorption of the negative charge-transfer material SrFe1-xCoxO3 -: art. no. 165120 [J].

Abbate, M ;

Zampieri, G ;

Okamoto, J ;

Fujimori, A ;

Kawasaki, S ;

Takano, M .

PHYSICAL REVIEW B, 2002, 65 (16) :1-7

[2]

Aschcroft N. W., 1976, SOLID STATE PHYS, P52

[3] Structural and magnetic properties of high-pressure/high-temperature synthesized (Sr1-xRx)CoO3 (R = Y and Ho) perovskites [J].

Balamurugan, S. ;

Takayama-Muromachi, E. .

JOURNAL OF SOLID STATE CHEMISTRY, 2006, 179 (07) :2231-2236

[4]

Barnard RD., 1972, THERMOELECTRICITY ME

[5] PREPARATION AND CHARACTERIZATION OF FULLY STOICHIOMETRIC SRCOO3 BY ELECTROCHEMICAL OXIDATION [J].

BEZDICKA, P ;

WATTIAUX, A ;

GRENIER, JC ;

POUCHARD, M ;

HAGENMULLER, P .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1993, 619 (01) :7-12

[6] Ferromagnetic properties of SrFe1-xCoxO3 synthesized under high pressure [J].

Kawasaki, S ;

Takano, M ;

Takeda, Y .

JOURNAL OF SOLID STATE CHEMISTRY, 1996, 121 (01) :174-180

[7] Transport and magnetization in the badly metallic itinerant ferromagnet SrRuO3 [J].

Klein, L ;

Dodge, JS ;

Ahn, CH ;

Reiner, JW ;

Mieville, L ;

Geballe, TH ;

Beasley, MR ;

Kapitulnik, A .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1996, 8 (48) :10111-10126

[8] Insensitivity of the band structure of substituted SrRuO3 as probed by Seebeck coefficient measurements [J].

Klein, Y ;

Hébert, S ;

Maignan, A ;

Kolesnik, S ;

Maxwell, T ;

Dabrowski, B .

PHYSICAL REVIEW B, 2006, 73 (05)

[9] Spin fluctuations and high temperature superconductivity [J].

Moriya, T ;

Ueda, K .

ADVANCES IN PHYSICS, 2000, 49 (05) :555-606

[10] ELECTRICAL RESISTIVITY OS SRRUO3 [J].

NORO, Y ;

MIYAHARA, S .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1969, 27 (02) :518-&