Study of Frustration Effects in Two-Dimensional Triangular Lattice Antiferromagnets-Neutron Powder Diffraction Study of VX_2,X≡Cl,Br and I
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概要
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In order to study the frustration effects, we have taken powder diffractionpatterns of VX. (X:Cl, Br and I) which are thought to be quasi-two-dimen-sional triangular lattice antiferromagnets. The spins in VCI., VBr. and Vl. werefound to order at 36.0, 29.5 and 16.3 K respectively forming a three sublatticestructure in the basal plane. Contrary to our expectation, a partially orderedmodel gives a better fit to the observed diffraction rather than the N<Set state with120' structure though the spins are of Heisenberg symmetry. In VCI. and VBr.,strong diffuse scattering can be observed not only at T>T. but also at T<<T..No critical scattering characteristic for 2D could be seen but the temperaturevariation of sublattice magnetization is rather close to that for the Ising system.
- 社団法人日本物理学会の論文
- 1983-05-15
著者
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UBUKOSHI Koji
Institute for Solid State Physics,University of Tokyo
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HIRAKAWA Kinshiro
Institute for Solid State Physics,University of Tokyo
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Ubukoshi K
The Institute For Solid State Physics The University Of Tokyo
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KADOWAKI Hiroaki
Institut Laue Langevin
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Ubukoshi Koji
Institute For Solid State Physics The University Of Tokyo
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Kadowaki H
Tokyo Metroporitan Univ. Tokyo
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Kadowaki Hiroaki
The Institute For Soild State Physics The University Of Tokyo
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Kadowaki Hiroaki
Department Of Physics Tokyo Metroporitan University
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Kawanaka H
National Inst. Advanced Industrial Sci. And Technol. Ibaraki Jpn
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Hirakawa Kinshiro
Institute For Solid State Physics University Of Tokyo
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Kato Hideyuki
Department Of Physics Faculty Of Science Hokkaido University
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Hirakawa Kinshiro
Institure For Solid State Physics University Of Tokyo
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