Suppression of Magnetic Phase Separation in Epitaxial SrCoOx Films

F. J. Rueckert; Y. F. Nie; C. Abughayada; S. A. Sabok-Sayr; H. Mohottala; J. I. Budnick; W. A. Hines; B. Dabrowski; B. O. Wells

doi:10.1063/1.4801646

Suppression of Magnetic Phase Separation in Epitaxial SrCoOx Films

Strongly Correlated Electrons 2013-05-06 v1 Materials Science

Authors: F. J. Rueckert , Y. F. Nie , C. Abughayada , S. A. Sabok-Sayr , H. Mohottala , J. I. Budnick , W. A. Hines , B. Dabrowski , B. O. Wells

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Abstract

Using pulsed laser deposition and a unique fast quenching method, we have prepared SrCoOx epitaxial films on SiTiO3 substrates. As electrochemical oxidation increases the oxygen content from x = 2.75 to 3.0, the films tend to favor the discrete magnetic phases seen in bulk samples for the homologous series SrCoO(3-n/8) (n = 0, 1, 2). Unlike bulk samples, 200nm thick films remain single phase throughout the oxidation cycle. 300 nm films can show two simultaneous phases during deoxidation. These results are attributed to finite thickness effects and imply the formation of ordered regions larger than approximately 300 nm.

Keywords

magnetic phase separation epitaxial SrCoOx films oxygen content finite thickness effects pulsed laser deposition

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@article{arxiv.1303.1149,
  title  = {Suppression of Magnetic Phase Separation in Epitaxial SrCoOx Films},
  author = {F. J. Rueckert and Y. F. Nie and C. Abughayada and S. A. Sabok-Sayr and H. Mohottala and J. I. Budnick and W. A. Hines and B. Dabrowski and B. O. Wells},
  journal= {arXiv preprint arXiv:1303.1149},
  year   = {2013}
}

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The following article has been submitted to Applied Physics Letters. After it is published, it will be found at http://apl.aip.org

Suppression of Magnetic Phase Separation in Epitaxial SrCoOx Films

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