Surface magnetism of β-FeO(OH) by Mössbauer spectroscopy

Autor:	Masao Kiyama, Akinori Yamamoto, Teruya Shinjo
Rok vydání:	1994
Předmět:	Nuclear and High Energy Physics Field (physics) Chemistry Magnetism Analytical chemistry Condensed Matter Physics Atomic and Molecular Physics and Optics Ion Mössbauer spectroscopy Surface layer Physical and Theoretical Chemistry Thin film Atomic physics Spectroscopy Hyperfine structure
Zdroj:	Hyperfine Interactions. 92:1311-1315
ISSN:	1572-9540
DOI:	10.1007/bf02065772
Popis:	Fine particles of β-FeO(OH) were prepared using the56Fe isotope and the surfaces of the particles were coated with extremely thin57Fe(III) layers. Mossbauer results show that the Fe(III) ions in the top surface layer are involved in the magnetic order and occupy two kinds of surface sites. Both of the two exchange field at surface sites, estimated from the temperature dependences of the hyperfine fields, are smaller than the bulk value. The decrease of exchange fields at the surface sites corresponds to the reduced number of neighboring magnetic ions at each site.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::813b0fc0a472c722853e955fa3404997 https://doi.org/10.1007/bf02065772 Zobrazit plný text záznamu Full text from SpringerLink