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Strain-induced magnetic phase transition in SrCoO3−δ thin films

Journal Article


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Abstract


  • It has been well established that both in bulk at ambient pressure and for films under modest strains, cubic SrCoO3−δ (δ<0.2) is a ferromagnetic metal. Recent theoretical work, however, indicates that a magnetic phase transition to an antiferromagnetic structure could occur under large strain accompanied by a metal-insulator transition. We have observed a strain-induced ferromagnetic-to-antiferromagnetic phase transition in SrCoO3−δ films grown on DyScO3 substrates, which provide a large tensile epitaxial strain, as compared to ferromagnetic films under lower tensile strain on SrTiO3 substrates. Magnetometry results demonstrate the existence of antiferromagnetic spin correlations and neutron diffraction experiments provide a direct evidence for a G-type antiferromagnetic structure with Neél temperatures between TN∼135±10K and ∼325±10K, depending on the oxygen content of the samples. Therefore, our data experimentally confirm the predicted strain-induced magnetic phase transition to an antiferromagnetic state for SrCoO3−δ thin films under large epitaxial strain.

UOW Authors


  •   Callori, S J. (external author)
  •   Hu, S (external author)
  •   Bertinshaw, Joel (external author)
  •   Yue, Zengji
  •   Danilkin, S (external author)
  •   Wang, Xiaolin
  •   Nagarajan, Vinayaka (external author)
  •   Klose, Frank (external author)
  •   Seidel, Jan (external author)
  •   Ulrich, Clemens (external author)

Publication Date


  • 2015

Citation


  • Callori, S. J., Hu, S., Bertinshaw, J., Yue, Z. J., Danilkin, S., Wang, X. L., Nagarajan, V., Klose, F., Seidel, J. & Ulrich, C. (2015). Strain-induced magnetic phase transition in SrCoO3−δ thin films. Physical Review B: Condensed Matter and Materials Physics, 91 (14), 140405-1-140405-5.

Scopus Eid


  • 2-s2.0-84928902763

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2506&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1504

Has Global Citation Frequency


Start Page


  • 140405-1

End Page


  • 140405-5

Volume


  • 91

Issue


  • 14

Place Of Publication


  • United States

Abstract


  • It has been well established that both in bulk at ambient pressure and for films under modest strains, cubic SrCoO3−δ (δ<0.2) is a ferromagnetic metal. Recent theoretical work, however, indicates that a magnetic phase transition to an antiferromagnetic structure could occur under large strain accompanied by a metal-insulator transition. We have observed a strain-induced ferromagnetic-to-antiferromagnetic phase transition in SrCoO3−δ films grown on DyScO3 substrates, which provide a large tensile epitaxial strain, as compared to ferromagnetic films under lower tensile strain on SrTiO3 substrates. Magnetometry results demonstrate the existence of antiferromagnetic spin correlations and neutron diffraction experiments provide a direct evidence for a G-type antiferromagnetic structure with Neél temperatures between TN∼135±10K and ∼325±10K, depending on the oxygen content of the samples. Therefore, our data experimentally confirm the predicted strain-induced magnetic phase transition to an antiferromagnetic state for SrCoO3−δ thin films under large epitaxial strain.

UOW Authors


  •   Callori, S J. (external author)
  •   Hu, S (external author)
  •   Bertinshaw, Joel (external author)
  •   Yue, Zengji
  •   Danilkin, S (external author)
  •   Wang, Xiaolin
  •   Nagarajan, Vinayaka (external author)
  •   Klose, Frank (external author)
  •   Seidel, Jan (external author)
  •   Ulrich, Clemens (external author)

Publication Date


  • 2015

Citation


  • Callori, S. J., Hu, S., Bertinshaw, J., Yue, Z. J., Danilkin, S., Wang, X. L., Nagarajan, V., Klose, F., Seidel, J. & Ulrich, C. (2015). Strain-induced magnetic phase transition in SrCoO3−δ thin films. Physical Review B: Condensed Matter and Materials Physics, 91 (14), 140405-1-140405-5.

Scopus Eid


  • 2-s2.0-84928902763

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2506&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1504

Has Global Citation Frequency


Start Page


  • 140405-1

End Page


  • 140405-5

Volume


  • 91

Issue


  • 14

Place Of Publication


  • United States