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Phys. Rev. Lett. 95, 047201 (2005) [4 pages]

Depth Profile of Uncompensated Spins in an Exchange Bias System

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S. Roy1, M. R. Fitzsimmons2, S. Park2, M. Dorn1, O. Petracic1,3, Igor V. Roshchin1, Zhi-Pan Li1, X. Batlle1,4, R. Morales1,5, A. Misra2, X. Zhang2, K. Chesnel6, J. B. Kortright6, S. K. Sinha1,2, and Ivan K. Schuller1
1Department of Physics, University of California at San Diego, La Jolla, California 92093, USA
2Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
3Angewandte Physik, Universität Duisburg-Essen, 47048 Duisburg, Germany
4Departament de Fisica Fonamental, Universitat de Barcelona, 08028 Barcelona, Catalonia, Spain
5Departamento de Fisica, Universidad de Oviedo, c/ Calvo Sotel s/n, Oviedo 33007, Spain
6Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

Received 8 March 2005; published 21 July 2005

We have used the unique spatial sensitivity of polarized neutron and soft x-ray beams in reflection geometry to measure the depth dependence of magnetization across the interface between a ferromagnet and an antiferromagnet. The net uncompensated magnetization near the interface responds to applied field, while uncompensated spins in the antiferromagnet bulk are pinned, thus providing a means to establish exchange bias.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.047201
DOI:
10.1103/PhysRevLett.95.047201
PACS:
75.70.Ak, 61.10.−i, 61.12.−q, 75.70.Cn
 
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