Chemically driven nanoscopic magnetic phase separation at the SrTiO 3(001)/La1-xSrxCoO3 interface

Maria A. Torija, Manish Sharma, Jaume Gazquez, Maria Varela, Chunyong He, Josh Schmitt, Julie A. Borchers, Mark Laver, Sami El-Khatib, Chris Leighton

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

The degradation in magnetic properties in very thin film complex oxides is studied using SrTiO3(001)/La1-xSrxCoO 3, providing unequivocal evidence for nanoscopic interfacial magnetic phase separation. Electron microscopy and spectroscopy reveal that this occurs due to inhomogeneity in local hole doping, driven by subtle, depthwise variations in the Sr and O stoichiometry. Simple thermodynamic and structural arguments for the origin of these variations are provided.

Original languageEnglish (US)
Pages (from-to)2711-2715
Number of pages5
JournalAdvanced Materials
Volume23
Issue number24
DOIs
StatePublished - Jun 24 2011

Keywords

  • complex oxides
  • magnetism
  • thin films

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