Naslov
Dielectric and magnetic relaxation of single-crystal hexaferrite Ba0.3Pb0.7Fe12O19

Autori
Rivas Góngora, David ; Novosel, Nikolina ; Ivek, Tomislav ; Tomić, Silvia ; Alyabyeva, Liudmila ; Zhukova, Elena S. ; Jagličić, Zvonko ; Gorshunov, B. P.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Solid-State Science & Research 2019 / - , 2019, 1-1

Skup
Solid State Science and Research Meeting

Mjesto i datum
Zagreb, Hrvatska, 27.06.2019. - 29.06.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
hexaferrite, birelaxor, ac magnetic susceptibility, domain wall, dispersion

Sažetak
Hexagonal barium hexaferrite Ba(Fe, Al)12O19 has been largely studied because of its wide range of important technological applications such as permanent magnets, magnetic-recording media, magneto-optical devices, microwave devices etc. [1, 2]. On the other hand, studies on lead-based PbFe12O19 have shown that it is ferromagnetic and ferroelectric at high temperatures [3]. Apparently, the dielectric, magnetic and optical properties of this material family can be highly influenced by lead-doping. Moreover, spin and charge of iron ions within the hexaferrite structure suggest there might a coupling between magnetic and dielectric excitations [4]. We present the study of frequency-dependent dielectric and magnetic response on single-crystalline lead-substituted hexaferrite Ba0.3Pb0.7Fe12O19 in the Hz-MHz frequency window at low temperatures. Our measurements show a temperature-dependent relaxation of both spins and charges. We discuss the dispersion of these relaxations and their origin in the context of magnetic domain walls. [1] U. Ozgur, et. al “Microwave ferrites, part 1: fundamental properties”, J Mater Sci-Mater Electron 20, 789–834 (2009). [2] R.C. Pullar, et.al “Hexagonal ferrites: a review of the synthesis, properties and applications of hexaferrite ceramics”, Prog Mater Sci 57, 1191–1334 (2012). [3]. Tan, G. L et. al “Ferroelectricity and Ferromagnetism of M‐Type Lead Hexaferrite”. Journal of the American Ceramic Society, 98(6), 1812-1817 (2015). [4] L. Alyabyeva et al., Proceedings of the 43rd International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THZ) (2018).

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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