Strain-induced changes of the electronic properties of B -site ordered double-perovskite Sr2CoIrO6 thin films

S. Esser, C. F. Chang, C. Y. Kuo, S. Merten, V. Roddatis, T. D. Ha, A. Jesche, V. Moshnyaga, H. J. Lin, A. Tanaka, C. T. Chen, L. H. Tjeng, P. Gegenwart

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Abstract

B-site ordered thin films of double perovskite Sr2CoIrO6 were epitaxially grown by a metalorganic aerosol deposition technique on various substrates, actuating different strain states. X-ray diffraction, transmission electron microscopy, and polarized far-field Raman spectroscopy confirm the strained epitaxial growth on all used substrates. Polarization-dependent Co L2,3 x-ray absorption spectroscopy reveals a change of the magnetic easy axis of the antiferromagnetically ordered (high-spin) Co3+ sublattice within the strain series. By reversing the applied strain direction from tensile to compressive, the easy axis changes abruptly from in-plane to out-of-plane orientation. The low-temperature magnetoresistance changes its sign respectively and is described by a combination of weak antilocalization and anisotropic magnetoresistance effects.

Original languageEnglish
Article number205121
JournalPhysical Review B
Volume97
Issue number20
DOIs
StatePublished - 15 May 2018

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    Esser, S., Chang, C. F., Kuo, C. Y., Merten, S., Roddatis, V., Ha, T. D., Jesche, A., Moshnyaga, V., Lin, H. J., Tanaka, A., Chen, C. T., Tjeng, L. H., & Gegenwart, P. (2018). Strain-induced changes of the electronic properties of B -site ordered double-perovskite Sr2CoIrO6 thin films. Physical Review B, 97(20), [205121]. https://doi.org/10.1103/PhysRevB.97.205121