Heat capacity and magnetic properties of fluoride CsFe2+Fe3+F6 with defect pyrochlore structure
- Gorev, M. V.
- Flerov, I. N.
- Tressaud, A.
- Bogdanov, E. V.
- Kartashev, A. V.
- Bayukov, O. A.
- Eremin, E. V.
- Krylov, A. S.
DOIAbstract
Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.Heat capacity,MössbauerandRamanspectraaswellasmagneticpropertiesof fluoride CsFe2F6 with defect pyrochlorestructurewerestudied.Inadditiontorecentlyfoundaboveroomtemperaturethree successivestructuraltransformationsPnma-Imma-I41amd-Fd-3m, phasetransitionofantiferromagnetic nature withthe13.7KNeeltemperatureandabroadheatcapacityanomalywithamaximumatabout 30 Kwereobserved.TheroomtemperaturesymmetryPnmaisunchangedatleastdownto7K.Simple model ofindirectbondusedtoestimatetheexchangeinteractionsandtoproposeamagneticstructure model
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