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Author (up) Sirena, M.; Haberkorn, N.; Granada, M.; Steren, L.B.; Guimpel, J. openurl 
  Title Metal-insulator transition induced by postdeposition annealing in low doped manganite films Type Journal Article
  Year 2009 Publication JOURNAL OF APPLIED PHYSICS Abbreviated Journal  
  Volume 105 Issue 3 Pages  
  Keywords  
  Abstract We studied the transport and magnetic properties of low-doped manganite films after different oxygenation processes. The oxygen content was adjusted by postdeposition annealing at different oxygen pressures and annealing times. For all the samples we observed an increase in the Curie temperature and the remnant magnetization with the oxygen content. In general, for decreasing number of oxygen vacancies, samples under expansive strain become more homogeneous and their electrical resistivity decreases. A metal-insulator transition is induced in highly oxygenated films grown on SrTiO3, probably related to a shift of the mobility edge crossing below the Fermi energy. We found that the oxygenation dynamics depend critically on the strain field induced by the substrates and also on the Sr doping concentration.  
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  ISSN 0021-8979 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000263409700057 Approved no  
  Call Number BT @ hernan @ Serial 143  
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