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Philosophical Magazine Volume 90, 2010 - Issue 6
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Original Articles

Thermal conductivity of USb2 and UBi2 single crystals

R. Wawryk Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50–950, Wroclaw, P.O. Box 1410, PolandCorrespondence[email protected]
,
J. Mucha Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50–950, Wroclaw, P.O. Box 1410, Poland
,
H. Misiorek Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50–950, Wroclaw, P.O. Box 1410, Poland
&
Z. Henkie Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50–950, Wroclaw, P.O. Box 1410, Poland; Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50–950, Wroclaw, P.O. Box 1410, Poland
Pages 793-801 | Received 21 Jun 2009, Accepted 27 Aug 2009, Published online: 03 Feb 2010
 
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Abstract

The thermal conductivity (κ) of single crystals of tetragonal uniaxial antiferromagnets USb2 (T N = 202 K) and UBi2 (T N = 180.8 K) has been measured along the a-axis (κa ) over the temperature range from 0.5 to 300 K and along the c-axis (κc ) from 0.5 to 70 K. The as-grown samples have residual resistivity ratio (RRR) values of about 500–600 and 100–150 for UBi2 and USb2, respectively. The anisotropy of the thermal conductivity (κa (T)/κc (T) ∼ 5) and the low-T Lorenz ratios are discussed in relation to Fermi surface topology for both compounds.

Acknowledgement

The authors are indebted to Dr. R.E. Baumbach for his assistance with manuscript editing.

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