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Growth and giant coercive field of spinel-structured Co3−x Mn x O4 thin films

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Abstract

We grew epitaxial thin films of CoMn2O4 and Co2MnO4 on Nb-doped SrTiO3(011) and SrTiO3(001) single crystal substrates using pulsed laser deposition. The magnetic Curie temperature (T c ) of the Co2MnO4 thin films was ~176 K, which is higher than that of the bulk whereas CoMn2O4 thin films exhibited a value of T c (~151 K) lower than that of the bulk. For the Co2MnO4 thin films, the M − H loop showed a coercive field of ~0.7 T at 10 K, similar to the value for the bulk. However, the M −H loop of the CoMn2O4(0ll) thin film grown on a Nb-doped SrTiO3(011) substrate exhibited a coercive field of ~4.5 T at 30 K, which is significantly higher than those of the Co2MnO4 thin film and bulk. This giant coercive field, only observed for the CoMn2O4(0ll) thin film, can be attributed to the shape anisotropy and strong spin-orbit coupling.

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Authors and Affiliations

  1. Department of Physics, Chungnam National University, Daejeon, 34134, Korea

    Yongsu Kwak & Jonghyun Song

  2. Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea

    Taeyeong Koo

Authors
  1. Yongsu Kwak
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  2. Jonghyun Song
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  3. Taeyeong Koo
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Correspondence to Jonghyun Song.

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Kwak, Y., Song, J. & Koo, T. Growth and giant coercive field of spinel-structured Co3−x Mn x O4 thin films. Journal of the Korean Physical Society 69, 263–267 (2016). https://doi.org/10.3938/jkps.69.263

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  • DOI: https://doi.org/10.3938/jkps.69.263

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