Mossbauer studies of superexchange interaction in tetragonal CuFe2O4

被引：0
|
作者：
Oak, HN [1 ]
Baek, KS [1 ]
Kim, SJ [1 ]
机构：
[1] Yonsei Univ, Dept Phys, Seoul 120749, South Korea
来源：
PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1998年 / 208卷 / 01期
关键词：
D O I：
10.1002/(SICI)1521-3951(199807)208:1<249::AID-PSSB249>3.0.CO;2-B
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
CuFe2O4 has been studied by Mossbauer spectroscopy and X-ray diffraction. The crystal is found to have a tetragonal spinel structure with the lattice constants a(0)=(5.805+/-0.005) Angstrom and c(0) = (8.669 +/- 0.005) Angstrom. The iron ions are in ferric Fe3+ states. The temperature dependence of the magnetic hyperfine fields at Fe-57 nuclei at the tetrahedral (A) and octahedral (B) sites is analyzed by the Neel theory of ferrimagnetism. The intersublattice superexchange;interaction is found to be antiferromagnetic with its strength of J(A-B) = -19.5/k(B) while intrasublattice superexchange interactions are ferromagnetic with their strengths of J(A-A) = 3.1k(B) and J(B-B) = 4.4k(B).
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页码：249 / 255
页数：7
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