Structure and magnetocaloric properties of La1-xKxMnO3 manganites

被引：46

作者：

Aliev, A. M. ^{[1
]}

Gamzatov, A. G. ^{[1
]}

Batdalov, A. B. ^{[1
]}

Mankevich, A. S. ^{[2
]}

Korsakov, I. E. ^{[2
]}

机构：

[1] RAS, Dagestan Sci Ctr, Inst Phys, Makhachkala 367003, Russia

[2] Moscow MV Lomonosov State Univ, Moscow 119899, Russia

来源：

PHYSICA B-CONDENSED MATTER | 2011年 / 406卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

Manganite; Magnetocaloric effect; MAGNETIC ENTROPY CHANGE; X MNO3 MANGANITES; EQUAL-TO-X; PYROPHORIC METHOD; ELECTRICAL-CONDUCTIVITY; HEAT-CAPACITY; MAGNETORESISTANCE; PEROVSKITE; TEMPERATURE; DEPENDENCE;

D O I：

10.1016/j.physb.2010.12.021

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A technology of obtaining the single-phase ceramic samples of La1 - xKxMnO3 manganites and the dependence of their structural parameters on the content of potassium has been described. Magnetocaloric effect (MCE) in the obtained samples has been measured by two independent methods: classical direct methodic and a method of magnetic field modulation. The values of MCE obtained by both methods substantially differ. The explanation of the observed divergences is given. The correlation between the level of doping and MCE value has been defined. The value of T-C determined by the MCE maximum conforms with the literature data obtained by other methods. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：885 / 889

页数：5

共 39 条

[31] Magnetocaloric effect and heat capacity in the phase-transition region [J].

Tishin, AM ;

Gschneidner, KA ;

Pecharsky, VK .

PHYSICAL REVIEW B, 1999, 59 (01) :503-511

[32]

Wang KQ, 2001, PHYS STATUS SOLIDI B, V223, P673, DOI 10.1002/1521-3951(200102)223:3<673::AID-PSSB673>3.0.CO

[33]

2-C

[34]

Wu J, 2004, CHINESE PHYS LETT, V21, P382, DOI 10.1088/0256-307X/21/2/047

[35] Magnetocaloric properties of Na-substituted perovskite-type manganese oxides [J].

Zhong, W ;

Chen, W ;

Ding, WP ;

Zhang, N ;

Du, YW ;

Yan, QJ .

SOLID STATE COMMUNICATIONS, 1998, 106 (01) :55-58

[36] Synthesis, structure and magnetic entropy change of polycrystalline La1-xKxMnO3+δ [J].

Zhong, W ;

Chen, W ;

Ding, WP ;

Zhang, N ;

Hu, A ;

Du, YW ;

Yan, QJ .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 195 (01) :112-118

[37]

Zhong W, 1998, EUR PHYS J B, V3, P169, DOI 10.1007/s100510050298

[38] Dependence of the magnetocaloric effect on oxygen stoichiometry in polycrystalline La2/3Ba1/3MnO3-δ [J].

Zhong, W ;

Chen, W ;

Au, CT ;

Du, YW .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2003, 261 (1-2) :238-243

[39] Structural and magnetic properties of alkali-substituted praseodymium manganites Pr1-xAxMnO3 (A=Na, K) [J].

Zouari, S ;

Cheikh-Rouhou, A ;

Strobel, P ;

Pernet, M ;

Pierre, J .

JOURNAL OF ALLOYS AND COMPOUNDS, 2002, 333 (1-2) :21-27

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