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Thermal conductivity of USb2 and UBi2 single crystals |
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| Authors: | R Wawryk J Mucha H Misiorek Z Henkie |
| Institution: | 1. Institute of Low Temperature and Structure Research, Polish Academy of Sciences , 50–950, Wroclaw, P.O. Box 1410, Poland r.wawryk@int.pan.wroc.pl;3. Institute of Low Temperature and Structure Research, Polish Academy of Sciences , 50–950, Wroclaw, P.O. Box 1410, Poland;4. Institute of Low Temperature and Structure Research, Polish Academy of Sciences , 50–950, Wroclaw, P.O. Box 1410, Poland;5. Institute of Low Temperature and Structure Research, Polish Academy of Sciences , 50–950, Wroclaw, P.O. Box 1410, Poland |
| 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. |
| Keywords: | uranium dipnictides thermal conductivity anisotropy |