High Pressure - High Temperature Diffraction Study of MnTe Using Synchrotron Radiation |
| W. Paszkowicz, E. Dynowska Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland and T. Peun GeoForschungsZentrum Potsdam, Telegrafenberg A17, 14473 Potsdam, Germany |
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| High pressure - high temperature experiments for MnTe of NiAs type were performed using a synchrotron radiation as X-ray source and a cubic anvil X-ray diffraction press to produce nonambient sample environment. In the investigated range of pressure (0-67.5 kbar) on uploading and with following temperature rise from 296 to 1273 K (at 67.5 kbar), the structure type of MnTe is conserved. An earlier reported nonlinear behaviour of lattice-parameter c0 is not found in the present study. Possible reasons of this discrepancy are discussed. The value of bulk modulus and its pressure derivative were calculated from the pressure-volume dependence by fitting the Birch-Murnaghan equation. |
| DOI: 10.12693/APhysPolA.91.939 PACS numbers: 62.50.+p, 64.30.+t, 65.70.+y |