High-pressure Raman study of the ferroelastic rutile-to-CaCl2 phase transition in ZnF2

Perakis, A; Lampakis, D; Boulmetis, YC; Raptis, C

dc.contributor.author	Perakis, A	en
dc.contributor.author	Lampakis, D	en
dc.contributor.author	Boulmetis, YC	en
dc.contributor.author	Raptis, C	en
dc.date.accessioned	2014-03-01T01:22:28Z
dc.date.available	2014-03-01T01:22:28Z
dc.date.issued	2005	en
dc.identifier.issn	1098-0121	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16581
dc.subject	High Pressure	en
dc.subject	Phase Transition	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	RUTILE-STRUCTURE	en
dc.subject.other	TEMPERATURE-DEPENDENCE	en
dc.subject.other	ELASTIC-MODULI	en
dc.subject.other	ACTIVE-MODES	en
dc.subject.other	SPECTROSCOPY	en
dc.subject.other	DIOXIDE	en
dc.subject.other	MGF2	en
dc.subject.other	POLYMORPHISM	en
dc.subject.other	EVOLUTION	en
dc.subject.other	SPECTRUM	en
dc.title	High-pressure Raman study of the ferroelastic rutile-to-CaCl2 phase transition in ZnF2	en
heal.type	journalArticle	en
heal.identifier.primary	10.1103/PhysRevB.72.144108	en
heal.identifier.secondary	http://dx.doi.org/10.1103/PhysRevB.72.144108	en
heal.identifier.secondary	144108	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	The high-pressure Raman spectra of ZnF2 have been measured up to 6.8GPa and provided unambiguous evidence of a phase transition from its ambient-pressure rutile (D4h14) to the CaCl2-type orthorhombic (D2h12) structure at a pressure Pc≈4.5GPa. Both macro- and micro-Raman spectra have been independently obtained at high pressures leading to the same conclusion about the high-pressure phase and the Pc. The transition appears to be closely associated with the B1g (Ag) Raman-active soft mode of the rutile (CaCl2) structure, implying that ZnF2 undergoes a second-order ferroelastic phase transition. © 2005 The American Physical Society.	en
heal.publisher	AMERICAN PHYSICAL SOC	en
heal.journalName	Physical Review B - Condensed Matter and Materials Physics	en
dc.identifier.doi	10.1103/PhysRevB.72.144108	en
dc.identifier.isi	ISI:000232934100025	en
dc.identifier.volume	72	en
dc.identifier.issue	14	en