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Tuning of physical properties of Fe7(PO4)6 by sodium intercalationстатья Исследовательская статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 2 мая 2018 г.
- Авторы: Kozlyakova Ekaterina, Danilovich Igor, Volkov Anatoliy, Zakharov Konstantin, Dimitrova Olga, Belokoneva Elena, Shvanskaya Larisa, Zvereva Elena, Chareev Dmitry, Volkova Olga, Vasiliev Alexander N.
- Журнал: Journal of Alloys and Compounds
- Том: 744
- Год издания: 2018
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 600
- Последняя страница: 605
- DOI: 10.1016/j.jallcom.2018.02.146
- Аннотация: The sodium intercalation of mixed – valence iron phosphate Fe32+Fe43+(PO4)6 results in drastic transformation of its physical properties. The parent compound Fe7(PO4)6 reaches magnetically ordered state through succession of phase transitions at TN1 = 45.5 K and TN2 = 16 K marked by sharp singularities in both specific heat Cp and magnetic susceptibility χ. The introduction of sodium suppresses the formation of antiferromagnetic state down to TN = 33 K in Na0.65Fe7(PO4)6. The low temperature phase transition in this compound smears being substituted by broad anomalies in magnetization and specific heat related to the spin/charge disorder effects. The sharp well resolved electron spin resonance spectra in parent material transform into asymmetric broad line in sodium – intercalated substance. The dielectric permittivity ε of Fe7(PO4)6 demonstrates a kink at TN2, while no singularity marks TN1. No features accompany magnetic phase transition in dielectric property of Na0.65Fe7(PO4)6 but ε reaches the relaxation maxima at high temperatures which can be attributed to the freezing of sodium ions.
- Добавил в систему: Козлякова Екатерина Сергеевна