Hyperfine interactions and irreversible magnetic behavior in multiferroic Aurivillius compounds

• Autorzy: Jartych E. , Gąska K. , Przewoźnik J. , Kapusta C. , Lisińska-Czekaj A. , Czekaj D. , Surowiec Z.
• Konferencja: Proceedings of the 9th All - Polish Seminar on Mössbauer Spectroscopy OSSM'2012, 10-13 June 2012, Lublin - Kazimierz Dolny, Poland
• Języki publikacji: EN

Abstrakty

EN

In this work investigations of structure and magnetic properties of conventionally sintered Bim+1Ti3Fem.3O3m+3 compounds with 4 less-than or equal to m less-than or equal to 8 were performed using X-ray diffraction, Mossbauer spectroscopy and vibrating sample magnetometry. Room-temperature Mossbauer spectra of the compounds correspond to a paramagnetic state, however, low temperature measurements (80 K) reveal the antiferromagnetic state with a residual paramagnetic phase. Temperature dependencies of magnetic susceptibility,chi sigma(T), provided magnetic ordering temperatures and revealed an irreversibility in Aurivillius compounds with m greater-than or equal to 5. In the case of Bi5Ti3FeO15 compound the chi sigma(T) dependence shows a paramagnetic behavior down to 2 K. The Bi6Ti3Fe2O18 compound reveals a magnetic ordering at 11 K. The compounds with m = 6-8 show a magnetic ordering at temperatures higher than 200 K. Highly irreversible character of their temperature dependencies of chi sigma indicates a spin-glass type disordered magnetism with frustration due to a random distribution of Fe on Ti at their sites.

Słowa kluczowe

EN

Aurivillius compounds; hyperfine interactions; magnetic properties; Mössbauer spectroscopy; multiferroics

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2013
• Tom: Vol. 58, No. 1
• Strony: 47--51
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Jartych E.

autor

Gąska K.

autor

Przewoźnik J.

autor

Kapusta C.

autor

Lisińska-Czekaj A.

autor

Czekaj D.

autor

Surowiec Z.

• Lublin University of Technology, Faculty of Electrical Engineering and Computer Science, Institute of Electronics and Information Technology, 38A Nadbystrzycka Str., 20-618 Lublin, Poland, Tel.: [phone], Fax: [phone],

Bibliografia

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