Szczegóły publikacji
Opis bibliograficzny
Effect of low Zn doping on the Verwey transition in magnetite single crystals: Mössbauer spectroscopy and x-ray diffraction / V. Chlan, J. ŻUKROWSKI, [et al.], Z. KĄKOL, A. KOZŁOWSKI, Z. TARNAWSKI, [et al.], I. BIAŁO, [et al.] // Physical Review. B ; ISSN 2469-9950. — Tytuł poprz.: Physical Review B, Condensed Matter and Materials Physics ; ISSN: 1098-0121. — 2018 — vol. 98 iss. 12, s. 125138-1–125138-9. — Bibliogr. s. 125138-8–1125138-9. — Publikacja dostępna online od: 2018-09-24
Autorzy (11)
- Chlan V.
- AGHŻukrowski Jan
- Bosak Alexey
- AGHKąkol Zbigniew
- AGHKozłowski Andrzej
- AGHTarnawski Zbigniew
- Rezníček R.
- Stepankova Helena
- Novak P.
- AGHBiało Izabela
- Honig Jurgen M.
Dane bibliometryczne
| ID BaDAP | 117027 |
|---|---|
| Data dodania do BaDAP | 2018-10-11 |
| Tekst źródłowy | URL |
| DOI | 10.1103/PhysRevB.98.125138 |
| Rok publikacji | 2018 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physical Review, B |
Abstract
To observe, by microscopic probe, how low Zn doping in Fe3−xZnxO4 (x is below 1%) changes the Verwey transition, we have performed Mössbauer spectroscopy measurements on three single crystalline samples with various Zn doping. In spectra analysis we used the recently published model of Mössbauer data treatment formulated as a result of ab initio calculations for a low-temperature monoclinic structure (of Cc symmetry) of magnetite. It was suggested there that the hyperfine parameters for all 24 Fe distinct positions in the lattice can be grouped into four major components with very similar hyperfine parameters within each set. Using these parameters as starting values, very good fits were obtained for magnetite with low doping level, while for higher doping, x=0.03, where the Verwey transition changes its character, one component is significantly different. In particular, low hyperfine field Beff=36T, considered as a characteristic feature of the Cc phase spectrum, is absent here. Also, in this case, the high-temperature spectra are different from those for lower doped magnetite showing more pronounced continuous alteration with temperature. This might be due to crystal structure of lower than Fd-3m symmetry, a fact suggested by our x-ray synchrotron studies. All this triggered a discussion about an experimental fingerprint for the difference between these two classes of magnetite, frequently referred to as magnetite of first- and second-order Verwey transition, and about the electronic structure of both kinds of systems.