Critical behavior of La0.67(BaxCa1-x)0.33MnO3 perovskites (0 ≤ x ≤ 1)

被引：3
作者：
Panagiotopoulos, I [1 ]
Moutis, N [1 ]
Stamopoulos, D [1 ]
Niarchos, D [1 ]
Pissas, M [1 ]
机构：
[1] Natl Ctr Sci Res Demokritos, Inst Mat Sci, Athens 15310, Greece
来源：
PHYSICA B | 2000年 / 284卷
关键词：
Arrott plots; critical exponent; manganese perovskites;
D O I：
10.1016/S0921-4526(99)02618-6
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The magnetic critical behavior in the series La-0.67(BaxCa1-x)(0.33)MnO3 (0 less than or equal to x less than or equal to 1) of manganese perovskites is studied by means of DC magnetic measurements. As Ca ions are substituted by the larger Ba ions, the transition temperature increases from 265 to 340 K as a result of structural changes. Arrott plots show that only in samples with x greater than or equal to 0.25 the magnetic properties follow the behavior expected for a conventional second-order ferromagnetic transition. The values of critical exponents (beta, gamma) estimated by modified Arrott plots are found to lie between those predicted for a 3D-Heisenberg model and those of mean field theory. (C) 2000 Elsevier Science B.V. All rights reserved.
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收藏
页码：1416 / 1417
页数：2
相关论文
共 12 条
  • [1] AMORPHICITY, HETEROGENEITY, AND THE ARROTT PLOTS
    AHARONI, A
    [J]. JOURNAL OF APPLIED PHYSICS, 1984, 56 (12) : 3479 - 3484
  • [2] CRITERION FOR FERROMAGNETISM FROM OBSERVATIONS OF MAGNETIC ISOTHERMS
    ARROTT, A
    [J]. PHYSICAL REVIEW, 1957, 108 (06): : 1394 - 1396
  • [3] APPROXIMATE EQUATION OF STATE FOR NICKEL NEAR ITS CRITICAL TEMPERATURE
    ARROTT, A
    NOAKES, JE
    [J]. PHYSICAL REVIEW LETTERS, 1967, 19 (14) : 786 - &
  • [4] ON A GENERALISED APPROACH TO 1ST AND 2ND ORDER MAGNETIC TRANSITIONS
    BANERJEE, SK
    [J]. PHYSICS LETTERS, 1964, 12 (01): : 16 - 17
  • [5] Evidence for magnetic polarons in the magnetoresistive perovskites
    DeTeresa, JM
    Ibarra, MR
    Algarabel, PA
    Ritter, C
    Marquina, C
    Blasco, J
    Garcia, J
    delMoral, A
    Arnold, Z
    [J]. NATURE, 1997, 386 (6622) : 256 - 259
  • [6] Evolution of the low-frequency spin dynamics in ferromagnetic manganites
    Fernandez-Baca, JA
    Dai, P
    Hwang, HY
    Kloc, C
    Cheong, SW
    [J]. PHYSICAL REVIEW LETTERS, 1998, 80 (18) : 4012 - 4015
  • [7] Kaul S.N., 1985, J MAGN MAGN MAT, V53
  • [8] Lattice effects in magnetoresistive manganese perovskites
    Millis, AJ
    [J]. NATURE, 1998, 392 (6672) : 147 - 150
  • [9] Critical exponents of the ferromagnetic-paramagnetic phase transition of La1-xSrx CoO3 (0.20≤x≤0.30)
    Mira, J
    Rivas, J
    Vázquez, M
    García-Beneytez, JM
    Arcas, J
    Sánchez, RD
    Señarís-Rodríguez, MA
    [J]. PHYSICAL REVIEW B, 1999, 59 (01): : 123 - 126
  • [10] LOW-TEMPERATURE MAGNETORESISTANCE AND THE MAGNETIC PHASE-DIAGRAM OF LA1-XCAXMNO3
    SCHIFFER, P
    RAMIREZ, AP
    BAO, W
    CHEONG, SW
    [J]. PHYSICAL REVIEW LETTERS, 1995, 75 (18) : 3336 - 3339
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