Lattice effects, stability under a high magnetic field, and magnetotransport properties of the charge-ordered mixed-valence La0.35Ca0.65MnO3 perovskite

被引:67
作者
Ibarra, MR
DeTeresa, JM
Blasco, J
Algarabel, PA
Marquina, C
Garcia, J
Stankiewicz, J
Ritter, C
机构
[1] UNIV ZARAGOZA,INST CIENCIA MAT ARAGON,E-50009 ZARAGOZA,SPAIN
[2] UNIV ZARAGOZA,FAC CIENCIAS,CONSEJO SUPER INVES CIENT,E-50009 ZARAGOZA,SPAIN
[3] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE
来源
PHYSICAL REVIEW B | 1997年 / 56卷 / 13期
关键词
D O I
10.1103/PhysRevB.56.8252
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The highly Mn+4-doped compound La0.35Ca0.65MnO3 has been studied up to high temperature (700 K) by using thermal-expansion, magnetostriction, magnetoresistance, and neutron-diffraction techniques. From 700 K down to room temperature the electrical conduction takes place through thermally activated hopping of polarons with E-hop = 45 meV. At the charge-ordering (CO) transition temperature T-CO = 275 K, pronounced anomalies in the resistivity and the lattice are observed. The neutron thermodiffractogram clearly establishes that the CO state occurs in the paramagnetic (P) phase and is accompanied by a large anisotropic lattice distortion with a simultaneous large distortion of the MnO6 octahedra. The antiferromagnetic (AF) phase appears at T-N = 160 +/- 3 K. At this temperature no lattice effect is observed. The CO-P and the CO-AF ground states are stable under an applied magnetic field up to 12 T.
引用
收藏
页码:8252 / 8256
页数:5
相关论文
共 27 条
[11]   FERROMAGNETIC COMPOUNDS OF MANGANESE WITH PEROVSKITE STRUCTURE [J].
JONKER, GH ;
VANSANTEN, JH .
PHYSICA, 1950, 16 (03) :337-349
[12]  
JONKER GH, 1950, PHYSICA, V16, P599
[13]   MAGNETORESISTANCE MEASUREMENTS ON THE MAGNETIC SEMICONDUCTOR ND0.5PB0.5MNO3 [J].
KUSTERS, RM ;
SINGLETON, J ;
KEEN, DA ;
MCGREEVY, R ;
HAYES, W .
PHYSICA B, 1989, 155 (1-3) :362-365
[14]  
LUTHI B, 1981, TOP CURR PHYS, V23, P131
[15]   Charge, orbital, and magnetic ordering in La0.5Ca0.5MnO3 [J].
Radaelli, PG ;
Cox, DE ;
Marezio, M ;
Cheong, SW .
PHYSICAL REVIEW B, 1997, 55 (05) :3015-3023
[16]   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
[17]   RECENT ADVANCES IN MAGNETIC-STRUCTURE DETERMINATION BY NEUTRON POWDER DIFFRACTION [J].
RODRIGUEZCARVAJAL, J .
PHYSICA B, 1993, 192 (1-2) :55-69
[18]  
SAPATHY S, 1996, PHYS REV LETT, V76, P960
[19]   LOW-TEMPERATURE MAGNETORESISTANCE AND THE MAGNETIC PHASE-DIAGRAM OF LA1-XCAXMNO3 [J].
SCHIFFER, P ;
RAMIREZ, AP ;
BAO, W ;
CHEONG, SW .
PHYSICAL REVIEW LETTERS, 1995, 75 (18) :3336-3339
[20]   METAL-INSULATOR-TRANSITION IN THE SYSTEM (CA1-XLAX)MNO2.97 (0.05-GREATER-THAN-OR-EQUAL-TO-X-GREATER-THAN-OR-EQUAL-TO-0.4) [J].
TAGUCHI, H ;
SHIMADA, M .
JOURNAL OF SOLID STATE CHEMISTRY, 1986, 63 (02) :290-294