Magnetic properties of copper metaborate: Two-parameter phenomenological model

Описание

Тип публикации: статья из журнала

Год издания: 2004

Идентификатор DOI: 10.1134/1.1687867

Аннотация: Symmetry analysis is performed for the magnetic subsystem of copper metaborate, and a phenomenological model is proposed with two two-component order parameters that correspond to ferromagnetism and antiferromagnetism vectors lying in the tetragonal plane of this crystal. Owing to the I (4) over bar 2d space group of symmetry of thПоказать полностьюis crystal, the thermodynamic potential contains the Lifshitz invariant having the form of an antisymmetric product of the order parameters and their spatial derivatives. Analysis of this model shows that the temperatures of ordering in the magnetic subsystem and of the formation of a spiral structure in it can be different. This fact allows numerical calculation of the temperature dependences of the spiral wave vector, magnetization, and intensities of first- and third-order magnetic satellites in the incommensurate phase that arise in neutron elastic scattering, as well as the field dependence of the magnetization. The experimental data, including a magnetic-field-temperature phase diagram, are satisfactorily described. The parameters of the phenomenological thermodynamic potential of the magnetic subsystem of copper metaborate are estimated. (C) 2004 MAIK "Nauka / Interperiodica".

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Издание

Журнал: PHYSICS OF THE SOLID STATE

Выпуск журнала: Vol. 46, Is. 3

Номера страниц: 491-497

ISSN журнала: 10637834

Место издания: MELVILLE

Издатель: AMER INST PHYSICS

Авторы

  • Popov M.A. (Krasnoyarsk State University)
  • Petrakovskii G.A. (Kirensky Institute of Physics,Siberian Division,Russian Academy of Sciences)
  • Zinenko V.I. (Kirensky Institute of Physics,Siberian Division,Russian Academy of Sciences)

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