The antiferromagnetic/paramagnetic transition in mixed-spin compounds R2BaNiO5

被引：6
作者：
Alvarez, JV [1 ]
Valentí, R
机构：
[1] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
[2] Univ Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany
来源：
EUROPEAN PHYSICAL JOURNAL B | 2005年 / 44卷 / 04期
关键词：
D O I：
10.1140/epjb/e2005-00143-2
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We present an extensive Quantum Monte Carlo study of the magnetic properties of the mixed-spin quantum systems R2BaNiO5 (R= magnetic rare earth) which show coexistence of 3-dimensional magnetic long-range order with 1-dimensional quantum gap excitations. We discuss the validity of the performed simulations in the critical region and show the excellent agreement with experimental results. We emphasize the importance of quantum fluctuations contained in our study which is absent in previous mean-field-like treatments.
引用
收藏
页码：439 / 445
页数：7
相关论文
共 21 条
  • [1] NEUTRON-DIFFRACTION STUDY OF THE MAGNETIC-STRUCTURE OF ER2BANIO5
    ALONSO, JA
    AMADOR, J
    MARTINEZ, JL
    RASINES, I
    RODRIGUEZCARVAJAL, J
    SAEZPUCHE, R
    [J]. SOLID STATE COMMUNICATIONS, 1990, 76 (04) : 467 - 474
  • [2] Dilution-controlled quantum criticality in rare-earth nickelates
    Alvarez, JV
    Rieger, H
    Zheludev, A
    [J]. PHYSICAL REVIEW LETTERS, 2004, 93 (15) : 156401 - 1
  • [3] Microscopic model for a class of mixed-spin quantum antiferromagnets -: art. no. 184417
    Alvarez, JV
    Valentí, R
    Zheludev, A
    [J]. PHYSICAL REVIEW B, 2002, 65 (18) : 1844171 - 1844175
  • [4] THE COMPOUND Y2BANIO5 - A NEW EXAMPLE OF A HALDANE-GAP IN A S = 1 MAGNETIC CHAIN
    DARRIET, J
    REGNAULT, LP
    [J]. SOLID STATE COMMUNICATIONS, 1993, 86 (07) : 409 - 412
  • [5] The loop algorithm
    Evertz, HG
    [J]. ADVANCES IN PHYSICS, 2003, 52 (01) : 1 - 66
  • [6] CLUSTER ALGORITHM FOR VERTEX MODELS
    EVERTZ, HG
    LANA, G
    MARCU, M
    [J]. PHYSICAL REVIEW LETTERS, 1993, 70 (07) : 875 - 879
  • [7] MAGNETIC-STRUCTURE OF HO2BANIO5
    GARCIAMATRES, E
    RODRIGUEZCARVAJAL, J
    MARTINEZ, JL
    SALINASSANCHEZ, A
    SAEZPUCHE, R
    [J]. SOLID STATE COMMUNICATIONS, 1993, 85 (07) : 553 - 559
  • [8] VARIATIONAL APPROACH TO THE XXZ SPIN-1 LINEAR-CHAIN - ELEMENTARY EXCITATIONS AND HALDANE CONJECTURE
    GOMEZSANTOS, G
    [J]. PHYSICAL REVIEW LETTERS, 1989, 63 (07) : 790 - 793
  • [9] NON-LINEAR FIELD-THEORY OF LARGE-SPIN HEISENBERG ANTI-FERROMAGNETS - SEMI-CLASSICALLY QUANTIZED SOLITONS OF THE ONE-DIMENSIONAL EASY-AXIS NEEL STATE
    HALDANE, FDM
    [J]. PHYSICAL REVIEW LETTERS, 1983, 50 (15) : 1153 - 1156
  • [10] Statistics of the two-dimensional ferromagnet Part I
    Kramers, HA
    Wannier, GH
    [J]. PHYSICAL REVIEW, 1941, 60 (03): : 252 - 262
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