Magnetothermal conductivity of La0.8Ca0.2MnO3

被引：53

作者：

Chen, BX ^{[1
]}

Rojo, AG ^{[1
]}

Uher, C ^{[1
]}

Ju, HL ^{[1
]}

Greene, RL ^{[1
]}

机构：

[1] UNIV MARYLAND,DEPT PHYS,CTR SUPERCONDUCT RES,COLLEGE PK,MD 20742

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.55.15471

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied thermal conductivity, thermopower, and resistivity of bulk polycrystalline La0.8Ca0.2MnO3. Large changes in the magnetothermal conductivity of about 15% and the thermopower as large as 80% were found in addition test large magnetoresistivity of 80% around the magnetic transition temperature at 240 K. The temperature dependence of the thermal conductivity displays a striking dip, while the resistivity and the thermopower have a peak near 240 K. The temperature and held dependences of the thermal conductivity are attributed to the scattering of the phonons by spin fluctuations.

引用

页码：15471 / 15474

页数：4

共 18 条

[1] Large magnetothermopower in La0.67Ca0.33MnO3 films [J].

Chen, BX ;

Uher, C ;

Morelli, DT ;

Mantese, JV ;

Mance, AM ;

Micheli, AL .

PHYSICAL REVIEW B, 1996, 53 (09) :5094-5097

[2]

Davis E. A., 1979, ELECT PROCESSES NONC

[3] TRANSPORT-MAGNETISM CORRELATIONS IN THE FERROMAGNETIC OXIDE LA0.7CA0.3MNO3 [J].

HUNDLEY, MF ;

HAWLEY, M ;

HEFFNER, RH ;

JIA, QX ;

NEUMEIER, JJ ;

TESMER, J ;

THOMPSON, JD ;

WU, XD .

APPLIED PHYSICS LETTERS, 1995, 67 (06) :860-862

[4] LARGE MAGNETOVOLUME EFFECT IN YTTRIUM DOPED LA-CA-MN-O PEROVSKITE [J].

IBARRA, MR ;

ALGARABEL, PA ;

MARQUINA, C ;

BLASCO, J ;

GARCIA, J .

PHYSICAL REVIEW LETTERS, 1995, 75 (19) :3541-3544

[5] Magnetothermopower in La0.67Ca0.33MnO3 thin films [J].

Jaime, M ;

Salamon, MB ;

Pettit, K ;

Rubinstein, M ;

Treece, RE ;

Horwitz, JS ;

Chrisey, DB .

APPLIED PHYSICS LETTERS, 1996, 68 (11) :1576-1578

[6] High-temperature thermopower in La2/3Ca1/3MnO3 films: Evidence for polaronic transport [J].

Jaime, M ;

Salamon, MB ;

Rubinstein, M ;

Treece, RE ;

Horwitz, JS ;

Chrisey, DB .

PHYSICAL REVIEW B, 1996, 54 (17) :11914-11917

[7] THOUSANDFOLD CHANGE IN RESISTIVITY IN MAGNETORESISTIVE LA-CA-MN-O FILMS [J].

JIN, S ;

TIEFEL, TH ;

MCCORMACK, M ;

FASTNACHT, RA ;

RAMESH, R ;

CHEN, LH .

SCIENCE, 1994, 264 (5157) :413-415

[8] GIANT MAGNETORESISTANCE IN LA1-XSRXMNOZ FILMS NEAR ROOM-TEMPERATURE [J].

JU, HL ;

KWON, C ;

LI, Q ;

GREENE, RL ;

VENKATESAN, T .

APPLIED PHYSICS LETTERS, 1994, 65 (16) :2108-2110

[9]

Kittel C., 1987, QUANTUM THEORY SOLID

[10]

KORENBLIT IY, 1971, SOV PHYS JETP-USSR, V33, P837

← 1 2 →