Volume 115, Number 5, September 2016
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||29 September 2016|
Evidence of iso-structural phase transition in rhombohedral Bi-Sb alloy
1 Department of Physics, Vidyasagar Evening College - 39 Sankar Ghosh Lane, Kolkata-700006, India
2 Department of Physics, University of Calcutta - 92 A P C Road, Kolkata-700009, India
3 Department of Physics, Raiganj University - Uttar Dinajpur-733134, India
4 Department of Low Temperature Physics and Superconductivity, Physics Faculty, M.V. Lomonosov Moscow State University - 119991, Moscow, Russia
5 High Pressure & Synchrotron Radiation Physics Division, Bhaba Atomic Research Centre - Mumbai-400085, India
6 Center for Research in Nanoscience and Nanotechnology, University of Calcutta - JD-2, Sector-III, Saltlake, Kolkata-700106, India
Received: 8 June 2016
Accepted: 1 September 2016
Temperature-dependent structural studies of polycrystalline Bi1−xSbx alloys were carried out using synchrotron x-ray diffraction. In-depth powder diffraction analysis reveals that an iso-structural phase transition takes place in the rhombohedral Bi-Sb alloy around 200 K, which is accompanied by anomalous behavior in the temperature-dependent linear thermal expansion data. In addition, the thermal variation of refined isotropic thermal parameters or Debye-Waller factor (Biso), ratio of the lattice parameters and Debye temperature indicates that anisotropy, arising due to local structural disorder, plays a significant role in this material.
PACS: 81.05.Bx – Metals, semimetals, and alloys / 65.90.+i – Other topics in thermal properties of condensed matter (restricted to new topics in section 65) / 61.05.cp – X-ray diffraction
© EPLA, 2016
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