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Pressure and magnetic field effects on Pr1-xCaxMnO3 thin films

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dc.contributor.author Antonakos, A en
dc.contributor.author Filippi, M en
dc.contributor.author Auban-Senzier, P en
dc.contributor.author Lampakis, D en
dc.contributor.author Pasquier, CR en
dc.contributor.author Prellier, W en
dc.contributor.author Liarokapis, E en
dc.date.accessioned 2014-03-01T01:31:42Z
dc.date.available 2014-03-01T01:31:42Z
dc.date.issued 2009 en
dc.identifier.issn 0370-1972 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/19891
dc.subject 61.05.cp en
dc.subject 74.62.Fj en
dc.subject 75.47.Lx en
dc.subject 78.30.-j en
dc.subject.classification Physics, Condensed Matter en
dc.subject.other INSULATOR-METAL TRANSITION en
dc.subject.other GIANT MAGNETORESISTANCE en
dc.subject.other RAMAN-SPECTROSCOPY en
dc.subject.other MANGANITES en
dc.subject.other PR0.7CA0.3MNO3 en
dc.subject.other LA1-XSRXMNO3 en
dc.subject.other RESISTIVITY en
dc.subject.other STRAIN en
dc.title Pressure and magnetic field effects on Pr1-xCaxMnO3 thin films en
heal.type journalArticle en
heal.identifier.primary 10.1002/pssb.200880539 en
heal.identifier.secondary http://dx.doi.org/10.1002/pssb.200880539 en
heal.language English en
heal.publicationDate 2009 en
heal.abstract We report a systematic study of Pr1-x Cax MnO3 (x = 0.4 and 0.6) thin films grown on LaAlO3 (LAO) substrate (PCMO/LAO). X-ray diffraction measurements have shown that the PCMO/LAO film is [101]-oriented and under compressive strain due to the lattice mismatch. According to Raman spectroscopy the Jahn-Teller modes are suppressed under the application of pressure in the PCMO (x = 0.4) thin film. In particular, it was found that a pressure of 2 GPa suppresses the charge ordered state. Further high pressure measurements have confirmed that resistivity decreases linearly up to 2.4 GPa corresponding to a total reduction of about 35% in resistivity leading to a more conductive state on both concentrations. The temperature dependence of the resistivity has shown that the samples under pressure retain their semiconducting behavior. At ambient pressure the PCMO (x = 0.6) film shows a moderate magnetoresistance in the range 0-7 T and no metal to insulator transition (MIT). Raman spectroscopy confirmed that the application of a magnetic field of 1 T does not induce any remarkable changes on the electron-phonon interaction. Although, the hydrostatic pressure is not enough to induce a macroscopic metallic state, its effect is much greater than the one of the magnetic field. In addition, the effect of the 7T magnetic field appears the same at ambient pressure and 2.5 GPa. Therefore the two effects of hydrostatic pressure and magnetic field do not seem to be coupled, at least up to the magnitudes studied. © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. en
heal.publisher WILEY-V C H VERLAG GMBH en
heal.journalName Physica Status Solidi (B) Basic Research en
dc.identifier.doi 10.1002/pssb.200880539 en
dc.identifier.isi ISI:000264244500033 en
dc.identifier.volume 246 en
dc.identifier.issue 3 en
dc.identifier.spage 622 en
dc.identifier.epage 625 en


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