Phase-separated manganites [Elektronische Ressource] : the effect of reversible elastic lattice strain on the electronic properties / vorgelegt von Martina Cornelia Dekker

Fakult at Mathematik und Naturwissenschaftender Technischen Universit at DresdenPhase-separated manganitesThe e ect of reversible elasticlattice strain on the electronicpropertiesDissertationzur Erlangung des akademischen GradesDoctor rerum naturalium(Dr. rer. nat.)vorgelegt vonMartina Cornelia Dekkergeboren am 1. Dezember 1982 in ’s Gravenhage, Die NiederlandeDresden2010Die vorliegende Dissertationsschrift wurde angefertigt am Institut fur MetallischeWerksto e des IFW Dresden.1. Gutachter: Prof. Dr. L. Schultz2.hter: Prof. Dr. C. JooEingereicht am: 26.01.2010Tag der Verteidigung: 15.06.2010For my parentsAbstractIn this work, the e ect of reversible elastic lattice strain on the electronic propertiesof a) (Pr La ) Ca MnO (PLCMO) thin lms and b) the interface layer of1 y y 0:7 0:3 3La Sr MnO (LSMO) with SrTiO (STO) has been determined using piezoelectric0:7 0:3 3 3substrates. Lattice strain is known to e ectively alter the electronic structure ofcompounds from the manganite family, since it shifts the balance of competingelectronic interactions by changing bond angles and bond lengths.The PLCMO lms have been prepared by pulsed laser deposition (PLD) froma La Ca MnO (LCMO) and a Pr Ca MnO (PCMO) target. The metal-0:7 0:3 3 0:7 0:3 3insulator phase boundary has been established to lie around y = 0:6.