Magnetocaloric behavior of rare earth doped La0.67Ba0.33MnO3

被引：33

作者：

Kumar, N. Pavan ^{[1
]}

Lalitha, G. ^{[1
,2
]}

Sagar, E. ^{[1
]}

Reddy, P. Venugopal ^{[1
]}

机构：

[1] Osmania Univ, Dept Phys, Hyderabad 500007, Telangana, India

[2] Telangana Univ, Dept Phys, Nizamabad 503322, Telangana, India

来源：

PHYSICA B-CONDENSED MATTER | 2015年 / 457卷

关键词：

Magnetic properties; Thermomagnetic effects; CMR materials; Magnetocaloric effect; LA0.7CA0.3MNO3; MANGANITES;

D O I：

10.1016/j.physb.2014.09.047

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Colossal Magneto Resistive (CMR) materials with the compositional formula, La0.67Ba0.33MnO3 (R=Pr, Nd, Sm and Gd) were prepared by the sol gel technique. After characterizing the samples structurally, a systematic investigation of magnetization has been undertaken, over a temperature range 70-300 K at 0.05 T magnetic held. An effort has been made to calculate the magnetocaloric behavior of all the samples theoretically using the experimental magnetization data. Other important parameters of magnetocaloric effect (MCE) such as maximum entropy change, full width at half-maximum, relative cooling power and maximum adiabatic temperature change were also computed. The observed behavior has been explained qualitatively. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：275 / 279

页数：5

共 20 条

[1] Crystallographic orientation and the magnetocaloric effect in MnP [J].

Booth, R. A. ;

Majetich, S. A. .

JOURNAL OF APPLIED PHYSICS, 2009, 105 (07)

[2] Developments in magnetocaloric refrigeration [J].

Brück, E .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2005, 38 (23) :R381-R391

[3] Magnetic phase transitions and the magnetothermal properties of gadolinium [J].

Dan'kov, SY ;

Tishin, AM ;

Pecharsky, VK ;

Gschneidner, KA .

PHYSICAL REVIEW B, 1998, 57 (06) :3478-3490

[4]

DUTTA NA, 2003, PHYS REV B, V68

[5] Recent developments in magnetocaloric materials [J].

Gschneidner, KA ;

Pecharsky, VK ;

Tsokol, AO .

REPORTS ON PROGRESS IN PHYSICS, 2005, 68 (06) :1479-1539

[6]

Hamad Mahmoud Aly, 2012, J THERM ANAL CALORIM, V85, P106

[7] 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

[8] Magnetocaloric effect in RMnO3 (R = Gd, Tb and Dy) multiferroics [J].

Kumar, N. Pavan ;

Reddy, P. Venugopal .

MATERIALS LETTERS, 2014, 122 :292-295

[9]

Nassri R.M., 2014, J SUPERCOND NOV MAGN, V27, P1463

[10] Giant magnetocaloric effect in Gd-5(Si2Ge2) [J].

Pecharsky, VK ;

Gschneidner, KA .

PHYSICAL REVIEW LETTERS, 1997, 78 (23) :4494-4497

← 1 2 →