Magnetic entropy change in La0.75Ca0.25-xSrxMnO3 perovskites

被引：52

作者：

Guo, ZB ^{[1
]}

Yang, W

Shen, YT

Du, YW

机构：

[1] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 105卷 / 02期

关键词：

magnetically ordered materials; phase transitions; thermodynamic properties;

D O I：

10.1016/S0038-1098(97)10064-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetic entropy change has been studied in a series of polycrystalline samples of La0.75Ca0.25-xSrxMnO3 with fixed carrier concentration and gradual change in the average ionic radius of the La site [r(A)]. In a fixed crystal structure with orthorhombic or rhombohedral phase, we found that the magnetic entropy change decreases with increasing [r(A)]. This phenomenon has been attributed to the difference in the volume thermal expansion at T-c which is influenced by [r(A)]. A smaller [r(A)] would be beneficial for obtaining larger magnetic entropy change. (C) 1997 Elsevier Science Ltd.

引用

页码：89 / 92

页数：4

共 20 条

[1] A STRUCTURAL PHASE-TRANSITION INDUCED BY AN EXTERNAL MAGNETIC-FIELD [J].

ASAMITSU, A ;

MORITOMO, Y ;

TOMIOKA, Y ;

ARIMA, T ;

TOKURA, Y .

NATURE, 1995, 373 (6513) :407-409

[2] MAGNETIC HEAT PUMPING NEAR ROOM-TEMPERATURE [J].

BROWN, GV .

JOURNAL OF APPLIED PHYSICS, 1976, 47 (08) :3673-3680

[3] Experimental evidence for the dynamic Jahn-Teller effect in La0.65Ca0.35MnO3 [J].

Dai, P ;

Zhang, JD ;

Mook, HA ;

Liou, SH ;

Dowben, PA ;

Plummer, EW .

PHYSICAL REVIEW B, 1996, 54 (06) :R3694-R3697

[4] Colossal magnetoresistance of ferromagnetic manganites: Structural tuning and mechanisms [J].

Fontcuberta, J ;

Martinez, B ;

Seffar, A ;

Pinol, S ;

GarciaMunoz, JL ;

Obradors, X .

PHYSICAL REVIEW LETTERS, 1996, 76 (07) :1122-1125

[5] Large magnetic entropy change in La0.75Ca0.25MnO3 [J].

Guo, ZB ;

Zhang, JR ;

Huang, H ;

Ding, WP ;

Du, YW .

APPLIED PHYSICS LETTERS, 1997, 70 (07) :904-905

[6] Large magnetic entropy change in perovskite-type manganese oxides [J].

Guo, ZB ;

Du, YW ;

Zhu, JS ;

Huang, H ;

Ding, WP ;

Feng, D .

PHYSICAL REVIEW LETTERS, 1997, 78 (06) :1142-1145

[7] THERMODYNAMIC SIMULATION OF A ROTATING ERICSSON-CYCLE MAGNETIC REFRIGERATOR WITHOUT A REGENERATOR [J].

HAKURAKU, Y .

JOURNAL OF APPLIED PHYSICS, 1987, 62 (05) :1560-1563

[8] MAGNETIC REFRIGERATION IN THE TEMPERATURE-RANGE FROM 10 K TO ROOM-TEMPERATURE - THE FERROMAGNETIC REFRIGERANTS [J].

HASHIMOTO, T ;

NUMASAWA, T ;

SHINO, M ;

OKADA, T .

CRYOGENICS, 1981, 21 (11) :647-653

[9] 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

[10] 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

← 1 2 →