Planar magnetic interactions in the hulsite-type oxyborate Co5.52Sb0.48(02B03)2

D. C. Freitas; R. B. GuimarAes; J. C. FernandesM. A. ContinentinoC. B. PinheiroJ. A. L. C. ResendeG. G. EslavaL. Ghivelder

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Planar magnetic interactions in the hulsite-type oxyborate Co5.52Sb0.48(02B03)2

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A large number of oxyborates studied up to now exhibit warwickite- or ludwigite-type structure withone-dimensional subunits (ladders or ribbons). The crystalline anisotropy strongly affects the physical proper-ties of these systems. In this paper we present an extensive structural, magnetic, and thermodynamic study ofan oxyborate Co5.525b0.48(02B03)2 with a hulsite-type structure. Differently from previously studied oxybo-rates, this material is characterized by the existence of planes in its structure which confers on it a strongtwo-dimensional (2D) character. This is manifested in the magnetic properties as shown by the low-temperature specific-heat results which are dominated by the contribution of two-dimensional antiferromag-netic magnons propagating in the planes. The 2D oxyborates opens the possibility of finding new and excitingbehavior in these materials.

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《Physical review, B. Condensed matter and materials physics》 |2010年第17期|174403:1-174403:7|共7页
作者
D. C. Freitas; R. B. GuimarAes; J. C. FernandesM. A. ContinentinoC. B. PinheiroJ. A. L. C. ResendeG. G. EslavaL. Ghivelder;
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作者单位

Instituto de Fisica, Universidade Federal Fluminense, Campus da Praia Vermelha, 24210-346 Niteroi, RJ, Brazil;

Centro Brasileiro de Pesquisas Fisicas, Rua Dr. Xavier Sigaud, 150 Urca, 22290-180 Rio de Janeiro, RJ, Brazil;

Departamento de Fisica, Instituto de Ciencias Exatas, Universidade Federal de Minas Gerais, Campus da Pampulha, Caixa Postal 702,30123-970 Belo Horizonte, MG, BrazilInstituto de Qimica, Universidade Federal Fluminense, Campus do Valonguinho, 24020-141 Niteroi, RJ, BrazilInstituto de Fisica, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, 21945-970 Rio de Janeiro, RJ, Brazil;

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正文语种英语
中图分类物理学;
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existence; magnetic properties; finding;

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Planar magnetic interactions in the hulsite-type oxyborate Co5.52Sb0.48(02B03)2

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