Spin fluctuations in La2/3Ca1/3MnO3 probed by 57Fe and 119Sn Mossbauer spectroscopy

被引：18
|
作者：
Simopoulos, A [1 ]
Kallias, G [1 ]
Devlin, E [1 ]
Panagiotopoulos, I [1 ]
Pissas, M [1 ]
机构：
[1] NCSR Demokritos, Inst Mat Sci, GR-15310 Athens, Greece
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1998年 / 177卷
关键词：
Mossbauer spectroscopy; relaxation; magnetoresistance; mixed valence manganese perovskites;
D O I：
10.1016/S0304-8853(97)00743-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Spin fluctuations in two samples of the La2/3Ca1/3MnO3 system doped with 1% Fe-57 and 5% Sn were studied by Mossbauer spectroscopy. Fe substitutes for Mn3+ and Sn for Mn4+. A charge redistribution occurs between 4.2 K and T-c. The charge carrier concentration defines magnetic regions with different coupling constants which fluctuate with relaxation rates increasing exponentially with temperature. At similar to 0.9T(c) both probes reveal charge localization which spreads fast in the Mn3+/Mn4+ lattice as the temperature approaches T-c. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：860 / 861
页数：2
相关论文
共 50 条
  • [41] Effects of the surface layer of La2/3Ca1/3MnO3 thin films
    Yao, Zhiyuan
    Zhang, Liuwan
    Cui, Yimin
    Wang, Chunchang
    Shen, Zhaoqiang
    SOLID STATE COMMUNICATIONS, 2006, 139 (09) : 465 - 467
  • [42] Mn valence instability in La2/3Ca1/3MnO3 thin films
    Valencia, S
    Gaupp, A
    Gudat, W
    Abad, L
    Balcells, L
    Cavallaro, A
    Martínez, B
    Palomares, FJ
    PHYSICAL REVIEW B, 2006, 73 (10)
  • [43] Phase separation at interfaces in La2/3Ca1/3MnO3 thin films
    Fontcuberta, J
    Bibes, M
    Wojcik, M
    Jedryka, E
    Nadolski, S
    València, S
    Balcells, LI
    Martínez, B
    SPINTRONICS, 2002, 690 : 79 - 89
  • [44] Infrared transmittance spectra of the granular perovskite La2/3Ca1/3MnO3
    Li, KB
    Cheng, RS
    Wang, SG
    Zhang, YH
    JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (19) : 4315 - 4322
  • [45] Charge inhomogeneities in La2/3Ca1/3MnO3 epitaxial thin films
    Laukhin, V
    Abad, LL
    Balcells, L
    Fontcuberta, J
    Martínez, B
    Gorbenko, O
    Kaul, A
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2005, 290 : 921 - 923
  • [46] Magnetoresistance in La2/3Ca1/3MnO3/La2/3Sr1/3CoO3 bilayers
    Feng, JF
    Zhao, K
    Huang, YH
    Zhao, SQ
    Lu, HB
    Zhao, JG
    Han, XF
    Zhan, WS
    Wong, HK
    PHYSICA B-CONDENSED MATTER, 2005, 369 (1-4) : 261 - 265
  • [47] La2/3Ca1/3MnO3的巨磁熵效应
    刘宁
    孙勇
    低温物理学报, 2000, (06) : 418 - 422
  • [48] Superparamagnetism and transport properties of ultrafine La2/3Ca1/3MnO3 powders
    Li, RW
    Xiong, H
    Sun, JR
    Li, QA
    Wang, ZH
    Zhang, J
    Shen, BG
    JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (01) : 141 - 148
  • [49] Noise probe of the dynamic phase separation in La2/3Ca1/3MnO3
    Raquet, B
    Anane, A
    Wirth, S
    Xiong, P
    von Molnár, S
    PHYSICAL REVIEW LETTERS, 2000, 84 (19) : 4485 - 4488
  • [50] Enhanced magnetoresistance in granular La2/3Ca1/3MnO3 polymer composites
    Huang, YH
    Chen, X
    Wang, ZM
    Liao, CS
    Yan, CH
    Zhao, HW
    Shen, BG
    JOURNAL OF APPLIED PHYSICS, 2002, 91 (10) : 7733 - 7735
12345