Resonant x-ray scattering studies of the magnetic structure near the surface of an antiferromagnet

Autor:	W. P. Ellis, Doon Gibbs, Hj. Matzke, G. H. Lander, Lonny E. Berman, Bruce D. Gaulin, G. M. Watson
Rok vydání:	2000
Předmět:	Materials science Magnetic structure Condensed matter physics Scattering Transition temperature X-ray crystallography Antiferromagnetism Inelastic scattering Atmospheric temperature range Néel temperature
Zdroj:	Physical Review B. 61:8966-8975
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.61.8966
Popis:	Resonant x-ray magnetic scattering is used to study magnetic order near the (001) surface of the antiferromagnetic oxide UO{sub 2} for temperatures between 10 and 35 K. It is found that for temperatures below the bulk Neel temperature a magnetically disordered region exists at the surface, and is separated from the magnetically ordered bulk by a diffuse magnetic interface. The width of the magnetic interface is temperature dependent, and appears to diverge as the sample temperature approaches the bulk Neel temperature. In contrast to the bulk, which exhibits a discontinuous magnetic ordering transition, the surface layers order continuously. These results are shown to be qualitatively consistent with the theory of surface induced disorder. (c) 2000 The American Physical Society.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8d260b4dbb6dda6d96cb5e995b1019e2 https://doi.org/10.1103/physrevb.61.8966 Zobrazit plný text záznamu