Počet záznamů: 1
Dielectric, magnetic and lattice dynamics properties of Y-type hexaferrite Ba.sub.0.5./sub.Sr.sub.1.5./sub.Zn.sub.2./sub.Fe.sub.12./sub.O.sub.22./sub.. Comparison of ceramics and single crystals
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SYSNO ASEP 0347513 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Dielectric, magnetic and lattice dynamics properties of Y-type hexaferrite Ba0.5Sr1.5Zn2Fe12O22. Comparison of ceramics and single crystals Tvůrce(i) Kamba, Stanislav (FZU-D) RID, ORCID, SAI
Goian, Veronica (FZU-D) RID, ORCID
Savinov, Maxim (FZU-D) RID, ORCID
Buixaderas, Elena (FZU-D) RID, ORCID
Nuzhnyy, Dmitry (FZU-D) RID, ORCID
Maryško, Miroslav (FZU-D) RID
Kempa, Martin (FZU-D) RID, ORCID
Bovtun, Viktor (FZU-D) RID, ORCID, SAI
Hlinka, Jiří (FZU-D) RID, ORCID
Knížek, Karel (FZU-D) RID, ORCID
Vaněk, Přemysl (FZU-D) RID, ORCID
Novák, Pavel (FZU-D) RID, ORCID
Buršík, Josef (UACH-T) RID, ORCID, SAI
Hiraoka, Y. (JP)
Kimura, T. (JP)
Kouřil, K. (CZ)
Štěpánková, H. (CZ)Zdroj.dok. Journal of Applied Physics. - : AIP Publishing - ISSN 0021-8979
Roč. 107, č. 10 (2010), 104109/1-104109/7Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova multiferroics ; infrared spectroscopy ; phonons ; magnon Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEP ME08059 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy IAA100100803 GA AV ČR - Akademie věd CEZ AV0Z10100520 - FZU-D (2005-2011) AV0Z10100521 - FZU-D (2005-2011) AV0Z40320502 - UACH-T (2005-2011) UT WOS 000278182400126 DOI 10.1063/1.3402379 Anotace We prepared multiferroic Y-type hexaferrite Ba0.5Sr1.5Zn2Fe12O22 ceramics and compared their magnetic and dielectric properties with single crystal. Magnetic susceptibility and microwave resonance measurement revealed magnetic phase transition at TC= 312 K, similar as in single crystal. Softening of magnon frequency was observed in the microwave range near TC, but at low temperatures it hardens to THz region on cooling. Ceramics quenched after sintering exhibit several orders of magnitude lower conductivity than the single crystal. Ferroelectric phase can be induced by external magnetic field in all investigated samples and the phase diagram in ceramics qualitatively resembles that of the single crystal. Moreover, we have observed in the single crystal, that the range of magnetic fields, where the ferroelectric phase is induced, broadens after annealing. Number and symmetry of observed infrared and Raman active phonons correspond to paraelectric phase with D3d5 hexagonal structure. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2011
Počet záznamů: 1