Haupt, Luis Peter

[["dc.bibliographiccitation.firstpage","593"],["dc.bibliographiccitation.lastpage","596"],["dc.bibliographiccitation.seriesnr","373-376"],["dc.contributor.author","Kattwinkel, A."],["dc.contributor.author","Braunstein, R."],["dc.contributor.author","Haupt, L."],["dc.contributor.author","Hamad, N."],["dc.contributor.author","Barner, K."],["dc.contributor.author","Gommert, E."],["dc.contributor.author","Wecker, J."],["dc.contributor.author","von Helmolt, R."],["dc.contributor.author","Medvedeva, I. V."],["dc.date.accessioned","2018-11-07T09:31:53Z"],["dc.date.available","2018-11-07T09:31:53Z"],["dc.date.issued","2001"],["dc.description.abstract","The time-resolved photoresponse of oxygen deficient Nd0.67Sr0.33MnO3-delta epitaxial layers is observed in TTE measurements in different regimes using different light intensities and spectral windows in the visible. In the regime of the metal - insulator transition the photoresponse increases sharply and shows saturation with increasing light intensity, suggesting a light-induced transition. We also present evindence of nucleation and growth of the light-induced phase."],["dc.identifier.isi","000172513500139"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31630"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Trans Tech Publications"],["dc.publisher.place","Zurich"],["dc.relation.conference","8th European Magnetic Materials and Applications Conference (EMMA 2000)"],["dc.relation.crisseries","Materials Science Forum"],["dc.relation.eventend","2000-06-10"],["dc.relation.eventlocation","Kiev, Ukraine"],["dc.relation.eventstart","2000-06-07"],["dc.relation.isbn","0-87849-880-X"],["dc.relation.ispartof","European magnetic materials and applications"],["dc.relation.ispartofseries","Materials Science Forum; 373-376"],["dc.title","Spectral and time-resolved photoresponse in Nd2/3Sr1/3MnO3-d epitaxial layers"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","145"],["dc.bibliographiccitation.journal","Journal of Alloys and Compounds"],["dc.bibliographiccitation.lastpage","148"],["dc.bibliographiccitation.volume","317"],["dc.contributor.author","Hamad, N."],["dc.contributor.author","El-Kassab, I."],["dc.contributor.author","Haupt, L."],["dc.contributor.author","Kasper, N."],["dc.contributor.author","Barner, K."],["dc.contributor.author","Rao, Gowravaram Mohan"],["dc.contributor.author","Sondermann, U."],["dc.contributor.author","Gmelin, E."],["dc.date.accessioned","2018-11-07T09:10:10Z"],["dc.date.available","2018-11-07T09:10:10Z"],["dc.date.issued","2001"],["dc.description.abstract","We present X-ray diffraction, magnetization, electrical resistivity, and magnetoresistance data for Nd-0.66(Sr1-yLiy)(0.34)MnO3 ceramics with y = 0, 0.05, 0.1, 0.2 and 0.3 in the temperature range 50 < T < 400 K and in fields up to 0.5 T. We find that Li substitution is possible up to y less than or equal to0.3 and generally enhances the resistivity and the magnetic randomization. Nevertheless, the resistivity curves still show the characteristic hump-like structure indicative of a combined ferromagnetic-paramagnetic metal-insulator transition, and a significant magnetoresistance is observed. The increase of the resistivity with Li content is ascribed to a blocking of Zener bonds associated with the charge unbalancing effect of Li+. (C) 2001 Elsevier Science B.V. AU rights reserved."],["dc.identifier.doi","10.1016/S0925-8388(00)01336-0"],["dc.identifier.isi","000168157200026"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26429"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Sa"],["dc.publisher.place","Lausanne"],["dc.relation.conference","13th InTernational Conference on Solid Compounds of Transition Elements"],["dc.relation.eventlocation","STRESA, ITALY"],["dc.relation.issn","0925-8388"],["dc.title","Magnetic and electrical properties of Nd-0.66(Sr1-yLiy)(0.34)MnO3 manganites"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","173"],["dc.bibliographiccitation.issue","1-6"],["dc.bibliographiccitation.journal","High Pressure Research"],["dc.bibliographiccitation.lastpage","179"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Medvedeva, I. V."],["dc.contributor.author","Bersenev, Y. S."],["dc.contributor.author","Haupt, L."],["dc.contributor.author","Hamad, N."],["dc.contributor.author","Barner, K."],["dc.contributor.author","Rao, Gowravaram Mohan"],["dc.contributor.author","Sun, J. R."],["dc.date.accessioned","2018-11-07T11:06:04Z"],["dc.date.available","2018-11-07T11:06:04Z"],["dc.date.issued","2000"],["dc.description.abstract","The temperature dependences of the resistivity of La0.7Ca0.3Mn1-xFexO3 and La0.7Ca0.3Mn1-xGexO3 (0 < x < 0.04) mixed crystals were studied under hydrostatic pressures up to 15 kbar. The substitution of Fe for Mn results in an increase of the resistivity and a continuous decrease of the metal-insulator transition temperature T-mb while the substitution of Ge for Mn leads to a more complicated T-mi(x)-curve. In all cases T-mi shifts under pressure with a rate between 1.6 and 2.9 K/kbar and a correlation between T-mi and its pressure derivative dT(mi)/dP is observed which is in accordance with the general trend of dT(mi)/dP versus T-mi as derived for other manganites and is discussed in terms of a competition between superexchange and double exchange."],["dc.identifier.doi","10.1080/08957950008200965"],["dc.identifier.isi","000166184700027"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/52218"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Gordon Breach Sci Publ Ltd"],["dc.publisher.place","Reading"],["dc.relation.conference","XXXVIIth Meeting of the European-High-Pressure-Research-Group (EHPRG)"],["dc.relation.eventlocation","UNIV MONTPELLIER, MONTPELLIER, FRANCE"],["dc.relation.issn","0895-7959"],["dc.title","Hydrostatic pressure effect on the metal-insulator transition in La0.7Ca0.3Mn1-x(Fe/Ge)(x)O-3 perovskites"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]