ФТТ, 2005, том 47, выпуск 8

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Magnetic structure and antiferromagnetic resonance spectrum in manganites: the effect of orbital structure

L.E.Gontchar, A.A.Mozhegorov

Urals State University,
620083 Ekaterinburg, Russia
E-mail: lyudmila.gonchar@usu.ru

The paper presents an investigation concerning temperature dependence of magnetic structure and antiferromagnetic resonance frequencies. Taking into account the crystal and orbital structures of pure lanthanum manganite, it is shown that the orbital structure plays the crucial role in forming of the magnetic structure. The H-T phase diagrams for the magnetic structure are drawn.

The work is partially supported by CRDF REC-005 and by Russian Foundation for Basic Research N 04-02-16204 and 04-02-96078.

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