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Unexpected phase locking of magnetic fluctuations in the multi-k magnet USb

Lim, J. A. and Blackburn, E. and Magnani, N. and Hiess, A. and Regnault, L.-P. and Caciuffo, R. and Lander, G. H. (2013) Unexpected phase locking of magnetic fluctuations in the multi-k magnet USb. Physical Review B, 87 (6). ISSN 1098-0121

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URL of Published Version: http://dx.doi.org/10.1103/PhysRevB.87.064421

Identification Number/DOI: doi:10.1103/PhysRevB.87.064421

The spin waves in the multi-k antiferromagnet USb soften and become quasielastic well below the antiferromagnetic ordering temperature TN. This occurs without a magnetic or structural transition. It has been suggested that this change is in fact due to dephasing of the different multi-k components: a switch from 3-k to 1-k behavior. In this work, we use inelastic neutron scattering with tridirectional polarization analysis to probe the quasielastic magnetic excitations and reveal that the 3-k structure does not dephase. More surprisingly, the paramagnetic correlations also maintain the same clear phase correlations well above TN (up to at least 1.4TN).

Type of Work:Article
Date:2013 (Publication)
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Physics and Astronomy
Subjects:QC Physics
Institution:University of Birmingham
Copyright Holders:American Physical Society
ID Code:1377
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