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Structural and magnetic phase transitions in Cs2[FeCl5(H2O)].
J Phys Condens Matter ; 30(29): 295403, 2018 Jul 25.
Artigo em Inglês | MEDLINE | ID: mdl-29869988
ABSTRACT
The compound [Formula see text] is magnetoelectric but not multiferroic with an erythrosiderite-related structure. We present a comprehensive investigation of its structural and antiferromagnetic phase transitions by polarization microscopy, pyroelectric measurements, x-ray diffraction and neutron diffraction. At about [Formula see text] K, the compound changes its symmetry from Cmcm to I2/c, with a doubling of the original c-axis. This transformation is associated with rotations of the [Formula see text] octahedra and corresponds to an ordering of the [Formula see text] molecules and of the related [Formula see text] bonds. A significant ferroelectric polarization can be excluded for this transition by precise pyrocurrent measurements. The antiferromagnetic phase transition occurring at [Formula see text] results in the magnetic space group [Formula see text], which perfectly agrees with previous measurements of the linear magnetoelectric effect and magnetization.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: J Phys Condens Matter Assunto da revista: Biofísica Ano de publicação: 2018 Tipo de documento: Artigo País de afiliação: Alemanha