Low temperature structural distortion in the high Tc Chevrel-phase superconductors PbMo6S8 and SnMo6S8 |
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Authors: | James D Jorgensen David G Hinks |
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Institution: | Materials Science and Technology Division Argonne National Laboratory, Argonne, IL 60439, USA |
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Abstract: | High-resolution powder neutron diffraction data reveal that, at temperatures below 100 K, oxygen-free, high-Tc samples of PbMo6S8 and SnMo6S8 exhibit a small structural distortion from the R rhombohedral space group. The data cannot be refined in a simple P triclinic space group as previously reported for EuMo6S8 and BaMo6S8. Thus, a supercell ordering is suggested. |
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