A Zheludev et al 2001 J. Phys.: Condens. Matter 13 R525 doi:10.1088/0953-8984/13/27/202
A Zheludev1, S Maslov1, T Yokoo2, S Raymond3, S E Nagler4 and J Akimitsu2
Show affiliationsMixed-spin systems composed of quantum spin chains with gapped magnetic excitations interacting through `auxiliary' magnetic ions show an effective separation between low-frequency classical and high-frequency quantum spin correlations. This phenomenon is realized in a family of rare-earth nickelates. Studies of these materials enable experimental measurements of some previously inaccessible fundamental properties of quantum spin chains to be made. The non-trivial intrinsic dynamics of the auxiliary spins gives rise to peculiar excitations of a mixed nature, and in certain cases may play a key role in long-range magnetic ordering.
Issue 27 (9 July 2001)
Received 3 April 2001
Published 22 June 2001
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