Magnetic Frustration in an Iron-Based Cairo Pentagonal Lattice

被引:139
作者
Ressouche, E. [1 ]
Simonet, V. [4 ,5 ]
Canals, B. [4 ,5 ]
Gospodinov, M. [6 ]
Skumryev, V. [2 ,3 ]
机构
[1] CEA Grenoble, INAC SPSMS MDN, F-38054 Grenoble 9, France
[2] ICREA, Bellaterra 08193, Spain
[3] Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Spain
[4] CNRS, Inst Neel, F-38042 Grenoble 9, France
[5] Univ Grenoble 1, F-38042 Grenoble 9, France
[6] Bulgarian Acad Sci, Inst Solid State Phys, BU-1184 Sofia, Bulgaria
关键词
DIFFRACTION;
D O I
10.1103/PhysRevLett.103.267204
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The Fe(3+) lattice in the Bi(2)Fe(4)O(9) compound is found to materialize the first analogue of a magnetic pentagonal lattice. Because of its odd number of bonds per elemental brick, this lattice, subject to first neighbor antiferromagnetic interactions, is prone to geometric frustration. The Bi(2)Fe(4)O(9) magnetic properties have been investigated by macroscopic magnetic measurements and neutron diffraction. The observed noncollinear magnetic arrangement is related to the one stabilized on a perfect tiling as obtained from a mean field analysis with direct space magnetic configuration calculations. The peculiarity of this structure arises from the complex connectivity of the pentagonal lattice, a novel feature compared to the well-known case of triangle-based lattices.
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页数:4
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