Reentrant insulating state in ultrathin manganite films

Bongju Kim, Daeyoung Kwon, Takeaki Yajima, Christopher Bell, Yasuyuki Hikita, Bog G. Kim*, Harold Y. Hwang, Chris Bell

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

22 Citations (Scopus)

Abstract

The transport and magnetic properties of La(0.7)Sr(0.3)MnO(3) thin-films grown by pulsed laser deposition on (LaAlO(3))(0.3)(SrAl(0.5)Ta(0.5)O(3))(0.7) single crystal substrates have been investigated. A systematic series with various thicknesses of La(0.7)Sr(0.3)MnO(3) was used to establish a phase diagram which showed a clear difference compared to films grown on SrTiO(3) substrates, highlighting the importance of film thickness, and substrate strain. At 8 unit cells, the boundary between the metallic and insulating groundstates, a second abrupt metal-insulator transition was observed at low temperatures, which could be tuned by magnetic field, and was interpreted as a signature of electronic phase separation. (C) 2011 American Institute of Physics. [doi:10.1063/1.3628659]

Original languageEnglish
Article number092513
Number of pages3
JournalApplied Physics Letters
Volume99
Issue number9
DOIs
Publication statusPublished - 29 Aug 2011

Keywords

  • PHASE-DIAGRAM
  • MAGNETORESISTANCE
  • TEMPERATURE
  • INTERFACE

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