Comparative study of magnetic and electric field induced insulator-metal-transitions in Pr 1-x Ca x MnO 3 films

W. Westhäuser, S. Schramm, J. Hoffmann and C. Jooss ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2006, vol. 53, issue 3, 323-331

Abstract: The insulator-metal (IM)-transition in Pr 1-x Ca x MnO 3 (PCMO) is of particular interest because it can be induced by a variety of external forces, such as magnetic and electric fields, photon exposure and hydrostatic pressure. In this paper, we present a comparative study of the IM-transition in magnetic and electric fields for epitaxial thin films prepared by pulsed laser deposition. The transport data as a function of applied field or temperature give strong evidence for the presence of electronic phase separation. However, the observed different IM-transitions in magnetic and electric fields indicate that two different areas of spatially inhomogeneous electronic ground states in the phase diagram of PCMO are involved. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Keywords: 73.50.-h Electronic transport phenomena in thin films, 75.47.-m Magnetotransport phenomena; materials for magnetotransport, 75.47.Lx Manganites, 71.30.+h Metal-insulator transitions and other electronic transitions, (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1140/epjb/e2006-00387-2

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