Fisher-Langer relation and scaling in the specific heat and resistivity of La0.7Ca0.3MnO3

被引：7

作者：

Jeong, YH ^{[1
]}

Park, SH ^{[1
]}

Koo, TY ^{[1
]}

Lee, KB ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea

来源：

SOLID STATE IONICS | 1998年 / 108卷 / 1-4期

关键词：

manganites; double exchange; small polaron; Fisher-Langer relation;

D O I：

10.1016/S0167-2738(98)00046-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have measured the specific heat and resistivity of mixed valence manganite La0.7Ca0.3MnO3 as a function of temperature and magnetic field. We demonstrate that the magnetic contribution to the specific heat in this system is proportional to the temperature coefficient of the resistivity in the magnetic phase transition region, following the Fisher-Langer relation. We also show that the specific heat and the temperature coefficient of resistivity measured as a function of temperature at various magnetic fields can be superposed to a single curve if they are properly scaled. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：249 / 254

页数：6

共 14 条

[1] CONSIDERATIONS ON DOUBLE EXCHANGE [J].

ANDERSON, PW ;

HASEGAWA, H .

PHYSICAL REVIEW, 1955, 100 (02) :675-681

[2] Evidence for magnetic polarons in the magnetoresistive perovskites [J].

DeTeresa, JM ;

Ibarra, MR ;

Algarabel, PA ;

Ritter, C ;

Marquina, C ;

Blasco, J ;

Garcia, J ;

delMoral, A ;

Arnold, Z .

NATURE, 1997, 386 (6622) :256-259

[3] RESISTIVE ANOMALIES AT MAGNETIC CRITICAL POINTS [J].

FISHER, ME ;

LANGER, JS .

PHYSICAL REVIEW LETTERS, 1968, 20 (13) :665-&

[4] STUDIES OF POLARON MOTION .1. THE MOLECULAR-CRYSTAL MODEL [J].

HOLSTEIN, T .

ANNALS OF PHYSICS, 1959, 8 (03) :325-342

[5] LATTICE EFFECTS ON THE MAGNETORESISTANCE IN DOPED LAMNO3 [J].

HWANG, HY ;

CHEONG, SW ;

RADAELLI, PG ;

MAREZIO, M ;

BATLOGG, B .

PHYSICAL REVIEW LETTERS, 1995, 75 (05) :914-917

[6] FERROMAGNETIC COMPOUNDS OF MANGANESE WITH PEROVSKITE STRUCTURE [J].

JONKER, GH ;

VANSANTEN, JH .

PHYSICA, 1950, 16 (03) :337-349

[7]

KUTERS RM, 1989, PHYSICA B, V155, P362

[8] DOUBLE EXCHANGE ALONE DOES NOT EXPLAIN THE RESISTIVITY OF LA1-XSRXMNO3 [J].

MILLIS, AJ ;

LITTLEWOOD, PB ;

SHRAIMAN, BI .

PHYSICAL REVIEW LETTERS, 1995, 74 (25) :5144-5147

[9]

PICKETT WE, 1996, PHYS REV B, V53, P1

[10] Thermodynamic and electron diffraction signatures of charge and spin ordering in La1-xCaxMnO3 [J].

Ramirez, AP ;

Schiffer, P ;

Cheong, SW ;

Chen, CH ;

Bao, W ;

Palstra, TTM ;

Gammel, PL ;

Bishop, DJ ;

Zegarski, B .

PHYSICAL REVIEW LETTERS, 1996, 76 (17) :3188-3191

← 1 2 →