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Resonant x-ray magnetic scattering is used to study magnetic order near the (001) surface of the antiferro-magnetic oxide UO(2) for temperatures between 10 K 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.

Additional information

Authors: WATSON G.M, University of Maryland, Baltimore (US);GIBBS ET AL, Brookhaven National Laboratories, Upton New York, (US);LANDER ET AL, JRC, ITU Postfach Karlsruhe, (DE);GAULIN B.D, McMaster University, Hamilton, Ontario (CA);ELLIS W, Los Alamos National Laboratory, New Mexico (US)
Bibliographic Reference: Article: Physical Review B, vol. 61, no.13, pp 8966-8975
Record Number: 200012817 / Last updated on: 2000-11-03
Original language: en
Available languages: en