Publication:
Magnetic susceptibility of pyrochlores R2Ti2O7: R = Gd, Dy, Tb

Дата
2020
Авторы
Kuznetsov, A. V.
Churkin, O. A.
Ivanov, A. A.
Popov, V. V.
Alekseev, P. A.
Menushenkov, A. P.
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Научные группы
Организационные подразделения
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Организационная единица
Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
Выпуск журнала
Аннотация
© 2019We present the study of magnetic susceptibility of pyrochlores Gd2Ti2O7, Dy2Ti2O7 and Tb2Ti2O7 which belong to frustrated magnets. The temperature dependence of the susceptibility χ(T) of powder samples was measured in the temperature range from 4.2 to 300 K and analyzed in the framework of mean field approximation taking into account both crystal field effects and anisotropy of the exchange interaction. We developed a simple approach allowing us to estimate interaction energies of magnetic ions from χ(T) dependences and data on wave functions of the crystal-field states of the ions using a minimum number of fitting parameters. We revealed a strong anisotropy of the exchange interaction in the paramagnetic state of Gd2Ti2O7 and obtained nearest-neighbor effective bond energies of the magnetic ions in Tb2Ti2O7 and Dy2Ti2O7 which are in good agreement with the temperatures of formation of the spin-ice state in these compounds.
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Magnetic susceptibility of pyrochlores R2Ti2O7: R = Gd, Dy, Tb / Kuznetsov, A.V. [et al.] // Journal of Magnetism and Magnetic Materials. - 2020. - 500. - 10.1016/j.jmmm.2019.166326
URI
https://www.doi.org/10.1016/j.jmmm.2019.166326
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85076867012&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000512907600020
 https://openrepository.mephi.ru/handle/123456789/20095
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