Pressure effects on the phase separation of Pr0.6Ca 0.4MnO3 thin films

Antonakos, A; Lampakis, D; Liarokapis, E; Filippi, M; Prellier, W; Auban-Senzier, P; Pasquier, C

dc.contributor.author	Antonakos, A	en
dc.contributor.author	Lampakis, D	en
dc.contributor.author	Liarokapis, E	en
dc.contributor.author	Filippi, M	en
dc.contributor.author	Prellier, W	en
dc.contributor.author	Auban-Senzier, P	en
dc.contributor.author	Pasquier, C	en
dc.date.accessioned	2014-03-01T01:29:03Z
dc.date.available	2014-03-01T01:29:03Z
dc.date.issued	2008	en
dc.identifier.issn	0953-8984	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19099
dc.subject	Phase Separation	en
dc.subject	Pressure Effect	en
dc.subject	Thin Film	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Antiferromagnetism	en
dc.subject.other	Calcium	en
dc.subject.other	Hydraulics	en
dc.subject.other	Hydrodynamics	en
dc.subject.other	Hydrostatic pressure	en
dc.subject.other	Manganese compounds	en
dc.subject.other	Phase modulation	en
dc.subject.other	Pressure effects	en
dc.subject.other	Thin films	en
dc.subject.other	Antiferromagnetic charges	en
dc.subject.other	Broad bands	en
dc.subject.other	Charge ordered insulating phase	en
dc.subject.other	Critical pressures	en
dc.subject.other	Electronic phase separations	en
dc.subject.other	Electronic scatterings	en
dc.subject.other	External pressures	en
dc.subject.other	Ferromagnetic metallic phase	en
dc.subject.other	Gruneisen parameters	en
dc.subject.other	High hydrostatic pressures	en
dc.subject.other	Low temperatures	en
dc.subject.other	Macroscopic states	en
dc.subject.other	Raman measurements	en
dc.subject.other	Phase separation	en
dc.title	Pressure effects on the phase separation of Pr0.6Ca 0.4MnO3 thin films	en
heal.type	journalArticle	en
heal.identifier.primary	10.1088/0953-8984/20/48/485202	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0953-8984/20/48/485202	en
heal.identifier.secondary	485202	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Micro-Raman measurements under high hydrostatic pressures (up to similar to 6.5 GPa) have been carried out on Pr0.6Ca0.4MnO3 thin film grown on LaAlO3 substrate at room and low temperatures (down to 80 K). We had investigated in detail the temperature and hydrostatic pressure dependence of the Raman phonons and calculated their beta = d ln omega/dp values and the Gruneisen parameters. Under the external pressure, certain peaks attributed to metallic phase gain intensity and become narrower. The charge ordered insulating phase, characterized by the orthorhombic-type Jahn -Teller broad band, is suppressed up to a critical pressure p(c1) approximate to 2 GPa, and the diffuse electronic scattering intensity decreases, implying that the compound becomes more conductive. However, the pressure is not enough to melt the charge ordered phase, while upon further increase (p(c2) approximate to 4 GPa) the macroscopic state remains insulating, at least up to the magnitudes studied. The behaviour of the system is ascribed to the electronic phase separation between a ferromagnetic metallic phase and an antiferromagnetic charge ordered insulating one.	en
heal.publisher	IOP PUBLISHING LTD	en
heal.journalName	Journal of Physics Condensed Matter	en
dc.identifier.doi	10.1088/0953-8984/20/48/485202	en
dc.identifier.isi	ISI:000260758800012	en
dc.identifier.volume	20	en
dc.identifier.issue	48	en