Observation of anomalously large magnetoelectric coupling in the hexagonal Z-type ferrite films

0556303 - FZÚ 2023 RIV DE eng J - Journal Article
Shin, K. W. - Soroka, Miroslav - Shahee, A. - Kim, K. H. - Buršík, J. - Kužel, R. - Vronka, Marek - Aguirre, M.H.
Observation of anomalously large magnetoelectric coupling in the hexagonal Z-type ferrite films.
Advanced Electronic Materials. Roč. 8, č. 6 (2022), č. článku 2101294. ISSN 2199-160X. E-ISSN 2199-160X
R&D Projects: GA ČR(CZ) GA19-06433S
Institutional support: RVO:68378271
Keywords : hexaferrites * magnetoelectric effect * magnetoelectric multiferroics * magnetoelectric susceptibility * thin films
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.2, year: 2022
Method of publishing: Limited access
https://doi.org/10.1002/aelm.202101294

Although the bulk hexaferrites are known to exhibit strong magnetoelectric (ME) effects near room temperature, the same effects are not realized in a thin film form. Herein, the growth of nearly epitaxial Co2Z-type hexaferrite Ba0.3Sr22.7Co2Fe24O41 (BSCFO) thin films on a SrTiO3 (111) substrate by a chemical solution deposition method is reported. The reciprocal space mapping on the annealed BSCFO films reveals broadening along the qx directions in the (0014) and (0018) peaks, indicating that the oxygen planes belonging to the off-centered octahedra have randomly distributed out-of-plane tilt to indicate significant disorder in the crystallographic orientation. Quantitative investigations reveal that both ME susceptibility and modulated electric polarization (ΔP) by magnetic field up to 370 K in the BSCFO films are always larger than those of the Co2Z-type single crystal by ≈2–15 times.
Permanent Link: http://hdl.handle.net/11104/0330588