Anomalous temperature and field behaviors of magnetization in cubic lattice frustrated ferromagnets

Andrey N. Ignatenko, Andrey A. Katanin, Valentin Yu Irkhin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Thermodynamic properties of cubic Heisenberg ferromagnets with competing exchange interactions are considered near the frustration point where the coefficientDin the spin-wave spectrum Ek ~ Dk2 vanishes. Within the Dyson-Maleev formalism it is found that at low temperatures thermal fluctuations stabilize ferromagnetism by increasing the value of D. For not too strong frustration this leads to an unusual”concave” shape of the temperature dependence of magnetization, which is in agreement with experimental data on the europium chalcogenides. Anomalous temperature behavior of magnetization is confirmed by Monte Carlo simulation. Strong field dependence of magnetization (paraprocess) at finite temperature is found near the frustration point.

Original languageEnglish
Title of host publicationSolid State Phenomena
EditorsNikolai Perov, Anna Semisalova
PublisherTrans Tech Publications Ltd
Pages3-7
Number of pages5
ISBN (Print)9783038354826
DOIs
Publication statusPublished - 2015
Externally publishedYes
Event6th Moscow International Symposium on Magnetism, MISM 2014 - Moscow, Russian Federation
Duration: 29 Jun 20143 Jul 2014

Publication series

NameSolid State Phenomena
Volume233-234
ISSN (Print)1012-0394
ISSN (Electronic)1662-9779

Conference

Conference6th Moscow International Symposium on Magnetism, MISM 2014
Country/TerritoryRussian Federation
CityMoscow
Period29/06/143/07/14

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