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Phys. Rev. B 66, 052403 (2002) [4 pages]

Magnetic properties of the low-dimensional cuprate Na5RbCu4(AsO4)4Cl2

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J. A. Clayhold
Department of Physics and Astronomy, Kinard Laboratory, Clemson University, Clemson, South Carolina 29634

M. Ulutagay-Kartin and S.-J. Hwu
Department of Chemistry, Clemson University, Clemson, South Carolina 29634

H.-J. Koo and M.-H. Whangbo
Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204

A. Voigt
Center for Simulational Physics, Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602

K. Eaiprasertsak
Department of Materials Science, Clemson University, Clemson, South Carolina 29634

Received 29 January 2002; revised 31 May 2002; published 2 August 2002

The magnetic properties of Na5RbCu4(AsO4)4Cl2 are reported. The material has a layered structure comprised of square Cu4O4 tetramers. The Cu ions are divalent and the system behaves as a low-dimensional S=1/2 antiferromagnet. Spin exchange in Na5RbCu4(AsO4)4Cl2 appears to be quasi-two-dimensional and nonfrustrated. Measurements of the bulk magnetic susceptibility and heat capacity are consistent with low-dimensional magnetism. The compound has an interesting, low-entropy, magnetic transition at T=17 K.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.66.052403
DOI:
10.1103/PhysRevB.66.052403
PACS:
75.30.Et, 75.40.Cx, 75.50.Ee
 
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