Naslov
Thermal and magnetic properties of M-type hexaferrites

Autori
Rapljenović, Željko ; Kisiček, Virna ; Novosel, Nikolina ; Dominko, Damir ; Rivas Gongora, David ; Drobac, Đuro ; Prester, Mladen ; Vinnik, Denis ; Alyabyeva, Liudmila ; Gorshunov, Boris ; Ivek, Tomislav

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

Izvornik
Book of abstracts of the 6th Central and Eastern European Conference on Thermal Analysis and Calorimetry (CEEC-TAC6) and 15th Mediterranean Conference on Calorimetry and Thermal Analysis (Medicta2021). / Andrei Rotaru, Matko Erceg - , 2021, 136-136

ISBN
978-606-11-7861-2

Skup
6th Central and Eastern European Conference on Thermal Analysis and Calorimetry (CEEC-TAC) ; 15th Mediterranean Conference on Calorimetry and Thermal Analysis (MEDICTA)

Mjesto i datum
Split, Hrvatska, 20.07.2021. - 24.07.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
hexaferrites, multiferroics, heat capacity measurements

Sažetak
Hexaferrites are a class of iron compounds which crystalize in a sandwich-like periodic stacking of iron-oxide layers containing different metal atoms. The simplest is the M-type with chemical formula AB12O19, where A = Ba, Pb ... and B = Fe, Ti ... Our recent measurements with frequency-dependent magnetic susceptibility technique on various substitutions within the M-type hexaferrite (Ba1−xPbxFe12−yAlyO19) has shown signatures of exotic phenomena which point toward a general relaxational mechanism in ferrimagnetic semiconductors. Moreover, it was shown that activation energies of relaxation dynamics increase by adding aluminum. Heat capacity measurements from room temperature down to liquid helium indicate that the whole temperature range can be fitted well by the Debye and Einstein contributions up to room temperature. The energy of the lowest Einstein mode came close to the energy of the Debye mode.

Izvorni jezik
Engleski

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