Influence of magnetic field on critical behavior near a first order transition in optimally doped manganites: The case of La1-xCaxMnO3 (0.2 ≤ x ≤ 0.4)

被引：92

作者：

Zhang, P. ^{[1
]}

Lampen, P. ^{[3
]}

Phan, T. L. ^{[1
]}

Yu, S. C. ^{[1
]}

Thanh, T. D. ^{[2
]}

Dan, N. H. ^{[2
]}

Lam, V. D. ^{[2
]}

Srikanth, H. ^{[3
]}

Phan, M. H. ^{[3
]}

机构：

[1] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea

[2] Vietnam Acad Sci & Technol, Inst Mat Sci, Hanoi, Vietnam

[3] Univ S Florida, Dept Phys, Tampa, FL 33620 USA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2013年 / 348卷

关键词：

Perovskite manganite; Magnetic transition; Critical behavior; MAGNETORESISTANCE; POINT;

D O I：

10.1016/j.jmmm.2013.08.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A detailed study of the properties of the ferromagnetic to paramagnetic transition in polycrystalline manganites La1-xCaxMnO3 (x=0.2, 0.3, 0.4) is presented. The first order transition in La0.7Ca0.3MnO3 is bordered by second order transitions in the neighboring La0.8Ca0.2MnO3 and La0.6Ca0.4MnO3 compositions. Analysis of the Landau-Lifshitz coefficients obtained from Arrott plots showed that while b(T) is uniformly negative in La0.7Ca0.3MnO3, it changes from positive to negative values in different magnetic field ranges for La0.8Ca0.2MnO3 and La0.6Ca0.4MnO3, indicating that the behavior cannot be described within a single model under the application of a strong field. The Kouvel-Fisher procedure performed on the samples with continuous transitions over different ranges of fitting field confirmed tricritical exponents in La0.6Ca0.4MnO3 but revealed that the critical exponents obtained for La0.8Ca0.2MnO3 depend strongly on the choice of field range, shifting from values consistent with short range (3D Heisenberg/3D Ising) interactions to those approaching the tricritical mean field model. This observation is attributed to the influence of magnetic field on the coexistence of energetically close double-exchange and super-exchange ferromagnetic interactions in La0.8Ca0.2MnO3. (c) 2013 Elsevier B.V. All rights reserved.

引用

页码：146 / 153

页数：8

共 58 条

[1] Charge ordering and polaron formation in the magnetoresistive oxide La0.7Ca0.3MnO3 [J].

Adams, CP ;

Lynn, JW ;

Mukovskii, YM ;

Arsenov, AA ;

Shulyatev, DA .

PHYSICAL REVIEW LETTERS, 2000, 85 (18) :3954-3957

[2] First-order nature of the ferromagnetic phase transition in (La-Ca)MnO3 near optimal doping -: art. no. 134414 [J].

Adams, CP ;

Lynn, JW ;

Smolyaninova, VN ;

Biswas, A ;

Greene, RL ;

Ratcliff, W ;

Cheong, SW ;

Mukovskii, YM ;

Shulyatev, DA .

PHYSICAL REVIEW B, 2004, 70 (13) :134414-1

[3] Carrier density collapse and colossal magnetoresistance in doped manganites [J].

Alexandrov, AS ;

Bratkovsky, AM .

PHYSICAL REVIEW LETTERS, 1999, 82 (01) :141-144

[4] Tricritical points in La-based ferromagnetic manganites [J].

Amaral, VS ;

Araújo, JP ;

Pogorelov, YG ;

Sousa, JB ;

Tavares, PB ;

Vieira, JM ;

Algarabel, PA ;

Ibarra, MR .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) :7646-7648

[5] Comparative Mossbauer and magnetization study of 1% 119Sn-doped La0.67Ca0.33MnO3 and La0.67Sr0.33MnO3 [J].

Assaridis, E. ;

Panagiotopoulos, I. ;

Moukarika, A. ;

Bakas, T. .

PHYSICAL REVIEW B, 2007, 75 (22)

[6] ON A GENERALISED APPROACH TO 1ST AND 2ND ORDER MAGNETIC TRANSITIONS [J].

BANERJEE, SK .

PHYSICS LETTERS, 1964, 12 (01) :16-17

[7] Transport effects in single-crystal La0.82Ca0.18MnO3 [J].

Bebenin, N. G. ;

Zainullina, R. I. ;

Bannikova, N. S. ;

Ustinov, V. V. ;

Mukovskii, Ya. M. .

PHYSICS OF THE SOLID STATE, 2008, 50 (04) :691-695

[8] Influence of magnetic field on the paramagnetic-ferromagnetic transition in a La1-xCaxMnO3 (x≈0.25) crystal:: Ultrasonic and transport studies [J].

Belevtsev, B. I. ;

Zvyagina, G. A. ;

Zhekov, K. R. ;

Kolobov, I. G. ;

Beliayev, E. Yu. ;

Panfilov, A. S. ;

Galtsov, N. N. ;

Prokhvatilov, A. I. ;

Fink-Finowicki, J. .

PHYSICAL REVIEW B, 2006, 74 (05)

[9] Critical behavior and magnetic entropy change in the La0.6Sr0.4Mn0.8Fe0.1Cr0.1O3 perovskite [J].

Ben Abdelkhalek, Sonia ;

Kallel, Nabil ;

Kallel, Sami ;

Pena, Octavio ;

Oumezzine, Mohamed .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2012, 324 (22) :3615-3619

[10] Approach to the metal-insulator transition in La1-xCaxMnO3 (0≤x≤0.2):: Magnetic inhomogeneity and spin-wave anomaly -: art. no. 104421 [J].

Biotteau, G ;

Hennion, M ;

Moussa, R ;

Rodríguez-Carvajal, J ;

Pinsard, L ;

Revcolevschi, A ;

Mukovskii, YM ;

Shulyatev, D .

PHYSICAL REVIEW B, 2001, 64 (10)

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