dc.contributor.author | URSAKI, Veacheslav V. | |
dc.contributor.author | BURLAKOV, Igor I. | |
dc.contributor.author | TIGINYANU, Ivan M. | |
dc.contributor.author | RAPTIS, Yannis S. | |
dc.contributor.author | ANASTASSAKIS, Evangelos | |
dc.contributor.author | AKSENOV, Igor | |
dc.contributor.author | SATO, Katsuaki | |
dc.date.accessioned | 2020-11-12T09:14:55Z | |
dc.date.available | 2020-11-12T09:14:55Z | |
dc.date.issued | 1998 | |
dc.identifier.citation | URSAKI, Veacheslav V., BURLAKOV, Igor I., TIGINYANU, Ivan M. et al. Pressure Induced Phase Transitions in Spinel and Wurtzite Phases of ZnAl2S4Compound. In: Japanese Journal of Applied Physics, 1998, V. 37, P. 1, Nr. 1, pp. 135-140. ISSN 0021-4922. | en_US |
dc.identifier.uri | https://doi.org/10.1143/jjap.37.135 | |
dc.identifier.uri | http://repository.utm.md/handle/5014/11358 | |
dc.description | Access full text - https://doi.org/10.1143/jjap.37.135 | en_US |
dc.description.abstract | ZnAl2S4 single crystals with spinel (α-phase) and wurtzite (w-phase) structures have been studied by Raman spectroscopy under hydrostatic pressures of up to 300 kbar. Significant changes in the phonon spectrum of the α-phase have been observed at the critical pressure of 230 kbar, which are attributed to a reversible phase transition to a denser high-pressure phase, having a similar structure to that of calcium ferrite. In the pressure interval of 180 to 230 kbar, the two phases coexist. The irreversible disappearance of the Raman signal of w-ZnAl2S4 doped by Cd at pressures above 90 kbar was attributed to a phase transition to a rocksalt-type structure. This critical pressure is 40 kbar lower than that in undoped w-ZnAl2S4 and is explained on the basis of crystal structure quality. Different structures were realized upon removing the pressure, depending on the highest pressure previously reached, such as a mixture of wurtzite and spinel phases, a spinel quasi-crystalline structure, or a pressure-induced amorphous phase. The behavior of the quasi-crystalline spinel structure upon repeating the pressure cycle was found to be different from that of the α-phase single crystal. | en_US |
dc.language.iso | en | en_US |
dc.publisher | IOP Publishing | en_US |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 United States | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/us/ | * |
dc.subject | single crystals | en_US |
dc.subject | crystals | en_US |
dc.subject | spinels | en_US |
dc.subject | Raman spectroscopy | en_US |
dc.title | Pressure Induced Phase Transitions in Spinel and Wurtzite Phases of ZnAl2S4Compound | en_US |
dc.type | Article | en_US |
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