Перевод названия: МАГНИТНЫЕ СВОЙСТВА МЕТАБОРАТА МЕДИ: ДВУХПАРАМЕТРИЧЕСКАЯ ФЕНОМЕНОЛОГИЧЕСКАЯ МОДЕЛЬ
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".
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