Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
131 0 |
SM ISO690:2012 EFTHIMIOPOULOS, Ilias, YARESKO, Alexander Ya, TSURKAN, Vladimir, DEISENHOFER, Joachim, LOIDL, Alois, PARK, Changyong. Multiple pressure-induced transitions in HgCr2S4. In: Applied Physics Letters, 2013, vol. 103, p. 0. ISSN 0003-6951. DOI: https://doi.org/10.1063/1.4830225 |
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Applied Physics Letters | |
Volumul 103 / 2013 / ISSN 0003-6951 | |
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DOI:https://doi.org/10.1063/1.4830225 | |
Pag. 0-0 | |
Rezumat | |
We have performed combined experimental and theoretical high-pressure investigations on magnetoelectric HgCr2S4 spinel. Overall, HgCr2S4 exhibits three reversible structural transitions under pressure: the starting Fd-3m phase adopts a tetragonal I41/amd structure at 20 GPa, an orthorhombic distortion occurs above 26 GPa, whereas a third structural transition takes place beyond 37 GPa. During the Fd-3m to I41/amd structural transition, HgCr2S4 experiences a volume change of 4% which is unexpected from space group symmetry considerations alone. Furthermore, the Fd-3m to I41/amd transformation appears to be concomitant with an insulator-to-metal transition whereas compression of HgCr2S4 leads to a gradual suppression of its ferromagnetism. |
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Cuvinte-cheie Insulator-to-metal transitions, Orthorhombic distortion, Pressure-induced transitions, Space-group symmetry, Structural transitions, Volume change |
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