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Magneto-structural correlations in Pr0.15Gd0.85Mn2Ge2 |
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| Authors: | I. Dincer Y. Elerman H. Ehrenberg C. Baehtz |
| Affiliation: | a Ankara University, Faculty of Engineering, Department of Engineering Physics, 06100 Besevler-Ankara, Turkey b Institute for Materials Science, Darmstadt University of Technology, Petersenstrasse 23, D-64287 Darmstadt, Germany c Hamburger Synchrotronstrahlungslabor, Notkestr. 85, D-22603 Hamburg, Germany |
| Abstract: | Magneto-structural correlations in Pr0.15Gd0.85Mn2Ge2 have been studied by synchrotron diffraction in the temperature range between 11 and 300 K. This compound crystallizes in the ThCr2Si2-type structure (space group  ). The unit cell parameters a and c were determined by Rietveld refinements as a function of temperature. Anomalies in the temperature dependence of the unit cell parameters a and c, the c/a ratio and the unit cell volume V at about 240 and 140 K, which is close to the magnetic phase transition temperatures, indicate a pronounced magneto-structural correlation. Spontaneous volume change and linear magnetostrictions are derived as a function of temperature. |
| Keywords: | 75.20.En 75.25.z 75.30.Kz 61.10.Nz 75.30.Cr |
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