| Autor: |
Rapljenović, Željko, Kisiček, Virna, Novosel, Nikolina, Dominko, Damir, Rivas Gongora, David, Drobac, Đuro, Prester, Mladen, Vinnik, Denis, Alyabyeva, Liudmila, Gorshunov, Boris, Ivek, Tomislav |
| Přispěvatelé: |
Andrei Rotaru, Matko Erceg |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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