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Physical Review Letters -- March 26, 2001 -- Volume 86, Issue 13, pp. 2878-2881

Spin Reorientation at the Antiferromagnetic NiO(001) Surface in Response to an Adjacent Ferromagnet

H. Ohldag,^1,2,3 A. Scholl,² F. Nolting,^1,2 S. Anders,² F. U. Hillebrecht,⁴ and J. Stöhr¹

¹Stanford Synchrotron Radiation Laboratory, P.O. Box 20450, Stanford, California 94309
²Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720
³Institut für Angewandte Physik, Universität Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany
⁴Max Planck Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany

(Received 22 September 2000)

Polarization dependent x-ray photoemission electron microscopy was used to investigate the spin structure near the surface of an antiferromagnetic NiO(001) single crystal in response to the deposition of a thin ferromagnetic Co film. For the cleaved NiO surface we observe only a subset of bulklike antiferromagnetic domains which is attributed to minimization of dipolar energies. Upon Co deposition a spin reorientation near the NiO interface occurs, with the antiferromagnetic spins rotating in plane, parallel to the spins of the Co layer. Our results demonstrate that the spin configuration in an antiferromagnet near its interface with a ferromagnet may significantly deviate from that in the bulk antiferromagnet. ©2001 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v86/p2878
doi:10.1103/PhysRevLett.86.2878
PACS: 75.70.-i, 75.70.Rf, 75.50.Ee, 78.20.Ls        Additional Information

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