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Physica B 403 (2008) 14111413 Yb2Pt2Pb: A new quasi-two-dimensional antiferromagnet
 

Summary: Physica B 403 (2008) 14111413
Yb2Pt2Pb: A new quasi-two-dimensional antiferromagnet
M.S. Kima,b,, M.C. Bennettb
, M.C. Aronsona,b,c
a
Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973 5000, USA
b
Department of Physics, University of Michigan, Ann Arbor, MI 48109 1120, USA
c
Department of Physics and Astronomy, State University of New York, Stony Brook, NY 11794 3800, USA
Abstract
We have synthesized single-crystals of Yb2Pt2Pb, which crystallize in the tetragonal U2Pt2Sn-type structure. The magnetic
susceptibility w is highly anisotropic. The wh1 0 0i for Bkh1 0 0i is 30 times larger than wh0 0 1i for Bkh0 0 1i at the lowest temperatures. Both
1=wT and MB of Yb2Pt2Pb are dominated by the CEF effect. The 1=wh1 0 0i above 150 K is well described by the CurieWeiss law with
y 34 K and meff 4:19mB, indicating well-localized Yb3
ions at high temperatures. A broad maximum in w is found around 3 K, just
above antiferromagnetic transition temperature of 2 K. This suggests an important role for fluctuations in this system, due to reduced
dimensionality or perhaps geometric frustration.
r 2007 Elsevier B.V. All rights reserved.
PACS: 75.30.Gw; 75.30.m; 75.30.Kz

  

Source: Aronson, Meigan - Department of Physics and Astronomy, SUNY at Stony Brook

 

Collections: Materials Science; Physics