SUPEREXCHANGE IN INSULATORS - COMPARISON OF DIFFERENT METHODS

被引:63
作者
VANKALKEREN, G
SCHMIDT, WW
BLOCK, R
机构
[1] Institute of Theoretical Chemistry, University of Amsterdam
来源
PHYSICA B & C | 1979年 / 97卷 / 04期
关键词
D O I
10.1016/0378-4363(79)90085-8
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A comparison is made between different methods of describing superexchange involving paramagnetic cations in non-conducting solids and molecular complexes. A description is given of the methods of Kramers (section 2), Anderson (section 4), Jansen and co-workers (section 3), Hay, Thibeault and Hoffmann (section 5.1), Harcourt (section 5.1) and of Kahn and Briat (section 5.2). To make a numerical comparison, the latter four are applied to a three-center, four-electron system representing a cation-anion-cation unit in an isoceles triangular configuration. Provided that no approximations are made, all methods exhibit the same qualitative behaviour with respect to geometrical variation of the system. For values of the bridging angle around 90°, ferromagnetic coupling is found. In addition, various assumptions and approximations in the methods are discussed and numerically investigated. © 1979.
引用
收藏
页码:315 / 337
页数:23
相关论文
共 84 条
  • [1] AMMETER JH, 1975, CHIMIA, V29, P504
  • [2] Anderson P. W., 1963, MAGNETISM, V1, P25
  • [3] ANDERSON PW, 1963, SOLID STATE PHYS, V14, P99
  • [4] [Anonymous], [No title captured]
  • [5] Becquerel J, 1934, PHYSICA, V1, P383
  • [6] ANOMALOUS PARAMAGNETISM OF COPPER ACETATE
    BLEANEY, B
    BOWERS, KD
    [J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1952, 214 (1119): : 451 - 465
  • [7] THEORY OF INDIRECT EXCHANGE INTERACTIONS BETWEEN WEAKLY-COUPLED OPEN-SHELL ATOMS
    BLOCK, R
    [J]. PHYSICA, 1974, 73 (02): : 312 - 326
  • [8] THEORY OF EXCHANGE INTERACTIONS BETWEEN WEAKLY COUPLED OPEN-SHELL ATOMS
    BLOCK, R
    [J]. PHYSICA, 1973, 70 (02): : 397 - 409
  • [9] BLOCK R, 1976, QUANTUM SCI, P123
  • [10] BLOCK R, 1974, THESIS U AMSTERDAM