Lu5Ir4Si10 whiskers: Morphology,crystal structure,superconducting and charge density wave transition studies |
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Authors: | C Opagiste M Leroux P Rodière G Garbarino S Pairis P Bordet P Lejay |
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Institution: | 1. Institut Néel, CNRS/UJF, PB 166, 38042 Grenoble Cedex 9, France;2. European Synchrotron Radiation Facility (ESRF), BP 220, 6 Rue Jules Horowitz, 38043 Grenoble Cedex, France |
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Abstract: | Highly perfect single crystal whiskers of Lu5Ir4Si10 were successfully grown out of the melt. Details of the surface and morphology of the whiskers are presented. X-ray diffraction data confirmed that the whisker structure has the same tetragonal P4/mbm space group symmetry as bulk single crystals with lattice parameters a=12.484(1) and c=4.190(2) Å. By means of field emission scanning electron microscopy, the morphology of the whiskers has been studied. Using a 4-circle X-ray diffractometer we found that whiskers grow along the c-axis direction and all side faces are oriented along the 1 1 0] direction. The mosaicity has been measured and is found to be almost perfect: below 0.15° along the c-axis. According to our transport measurements performed along the c-axis, the whiskers present a sharp superconducting transition at Tc=4.1 K and show a charge density wave (CDW) transition at 77 K. From the hysteresis of the temperature dependance of the electrical resistivity study, the CDW transition is found to be of first order. |
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Keywords: | A1 Crystal structure A1 X-ray diffraction A2 Growth from melt A2 Single crystal growth B1 Rare-earth compounds B2 Superconducting materials |
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