Modulated magnetic structure in quasi-one-dimensional clinopyroxene NaFeGe2O6

Тип публикации: статья из журнала

Год издания: 2011

Идентификатор DOI: 10.1134/S1063776110061093

Ключевые слова: Antiferromagnetics, Clinopyroxenes, Field dependence, Helical modulation, Incommensurate magnetic structures, Magnetic phase transitions, Monoclinic compound, Order-disorder, Orientation phase transitions, Quasi-one-dimensional, Temperature behavior, Temperature dependence, Wave vector, Antiferromagnetism, Magnetic devices, Magnetic structure, Phase transitions, Crystallography

Аннотация: The magnetic structure of the NaFeGe2O6 monoclinic compound has been experimentally investigated using the elastic scattering of neutrons. At a temperature of 1.6 K, an incommensurate magnetic structure has been observed in the form of an antiferromagnetic helix formed by a pairs of the spins of the Fe3+ ions with helical modulation in the ac plane of the crystal lattice. The wave vector of the magnetic structure has been determined and its temperature behavior has been studied. The analysis of the temperature dependences of the specific heat and susceptibility, as well as the isotherms of the field dependence of the magnetization, has revealed the existence of not only the order-disorder magnetic phase transition at the point T (N) = 13 K, but also an additional magnetic phase transition at the point T (c) = 11.5 K, which is assumingly an orientation phase transition.

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Издание

Журнал: JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS

Выпуск журнала: Vol. 112, Is. 1

Номера страниц: 121-126

ISSN журнала: 10637761

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Drokina T.V. (Siberian Federal University)
  • Petrakovskii G.A. (Siberian Federal University)
  • Balaev A.D. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Kartashev A.V. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Ivanov D.A. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Keller L. (Laboratory for Neutron Scattering,ETH Zurich and Paul Scherrer Institut)
  • Schefer J. (Laboratory for Neutron Scattering,ETH Zurich and Paul Scherrer Institut)

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