The effect of chemical distribution on the magnetocaloric effect: A case study in second-order phase transition manganites

被引：36

作者：

Amaral, J. S. ^{[1
,2
]}

Tavares, P. B. ^{[3
]}

Reis, M. S. ^{[1
,2
]}

Araujo, J. P. ^{[4
,5
]}

Mendonca, T. M. ^{[4
,5
]}

Amaral, V. S. ^{[1
,2
]}

Vieira, J. M. ^{[6
]}

机构：

[1] Univ Aveiro, Dept Fis, P-3810193 Aveiro, Portugal

[2] Univ Aveiro, CICECO, P-3810193 Aveiro, Portugal

[3] Univ Tras Montes & Alto Douro, Dept Quim, CQ VR, P-5001801 Vila Real, Portugal

[4] Univ Porto, Dept Fis, P-6874169 Oporto, Portugal

[5] IFIMUP, P-6874169 Oporto, Portugal

[6] Univ Aveiro, Dept Ceram & Vidro, P-3810193 Aveiro, Portugal

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2008年 / 354卷 / 47-51期

关键词：

Magnetic properties; Modeling and simulation; Sintering; Thermodynamics;

D O I：

10.1016/j.jnoncrysol.2008.05.078

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ferromagnetic manganites of general formula ABMnO(3) (where A is a trivalent rare-earth ion and B is a divalent dopant) are candidates for magnetic cooling applications, since they can present either second-or first-order magnetic phase transitions, and the perovskite structure allows for substantial chemical substitution and tuning of the magnetocaloric properties. The consequent chemical distribution from substitution affects the magnetic and magnetocaloric properties of the compound. The change of relative cooling power with chemical disorder is discussed by the use of the molecular mean-field model. We present experimental results of the ferromagnetic, second-order phase transition La(0.70-x)(Er, Eu)(x)Sr(0.30)MnO(3) system. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：5301 / 5303

页数：3

共 10 条

[1] Magnetocaloric effect in Er- and Eu-substituted ferromagnetic La-Sr manganites [J].

Amaral, JS ;

Reis, MS ;

Amaral, VS ;

Mendonça, TM ;

Araújo, JP ;

Sá, MA ;

Tavares, PB ;

Vieira, JM .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2005, 290 :686-689

[2] Developments in magnetocaloric refrigeration [J].

Brück, E .

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

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

Gschneidner, KA ;

Pecharsky, VK ;

Tsokol, AO .

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

[4] 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

[5] Magnetocaloric effect from indirect measurements: Magnetization and heat capacity [J].

Pecharsky, VK ;

Gschneidner, KA .

JOURNAL OF APPLIED PHYSICS, 1999, 86 (01) :565-575

[6] Evidence of electronic phase separation in Er3+-doped La0.8Sr0.2MnO3 [J].

Ravindranath, V ;

Rao, MSR ;

Suryanarayanan, R ;

Rangarajan, G .

APPLIED PHYSICS LETTERS, 2003, 82 (17) :2865-2867

[7] Cation disorder and the metal-insulator transition temperature in manganese oxide perovskites [J].

Rodriguez-Martinez, LM ;

Attfield, JP .

PHYSICAL REVIEW B, 1998, 58 (05) :2426-2429

[8] Cation disorder and size effects in magnetoresistive manganese oxide perovskites [J].

RodriguezMartinez, LM ;

Attfield, JP .

PHYSICAL REVIEW B, 1996, 54 (22) :15622-15625

[9]

ROMANOV AY, 1997, PHYS MET METALLOGR, V83, P5

[10] REVISED EFFECTIVE IONIC-RADII AND SYSTEMATIC STUDIES OF INTERATOMIC DISTANCES IN HALIDES AND CHALCOGENIDES [J].

SHANNON, RD .

ACTA CRYSTALLOGRAPHICA SECTION A, 1976, 32 (SEP1) :751-767

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