Ivanova I. Microscopic theory of spin configurations and magnetostriction in multy-sublattice antiferromagnets

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0409U003989

Thesis Registration Form

0409U003989.pdf

Applicant for

Specialization

  • 01.04.07 - Фізика твердого тіла

10-11-2009

Specialized Academic Board

Д 26.168.02

G. V. Kurdyumov IMPh of the N.A.S.U.

Essay

The results of theoretical investigations of triangular and singlet antiferromagnets with magnetic anisotropy of "easy-plane" type in magnetic field are presented in thesis. The field dependecies of six spin sublattices angles of turn are found. It is shown the existence of two types of critical fields. Different types of magnetostriction are analyzed. The thermodinamic theory is built for describing the phase transition in singlet systems from non-magnetic to antiferromagnetic state, induces by the field along the "heavy axis". The field dependencies of magnetization and magnetostriction are obtained and it is shown their good agreement with experimental data.

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Files

Aref.doc

dissert.doc

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