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Magnetic property and 57Fe Mössbauer analysis of dilute Fe and Nb codoped SrTiO3-δ(STO) perovskites

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Abstract

Dilute Fe and Nb codoped SrTiO3-δ (STO) perovskites were prepared by a complex formation and thermal decomposition method. The structure, magnetization properties and chemical states of Fe and Nb codoped STO perovskites were characterized by XRD, VSM and Mössbauer spectrometry. Mössbauer spectra of 57Fe and Nb codoped STO perovskites consist of paramagnetic doublet and magnetic relaxation components. The 1% Fe + 5% Nb codoped STO sample showed the smallest lattice constant and the largest ferromagnetism among 0.5–4% Fe + 5% Nb codoped STO perovskites. The most distortion of cubic STO lattice and the largest magnetic relaxation in Mössbauer spectrum were observed for the 0.5% Fe and 5% Nb codoped STO perovskite. It is considered that diluted magnetism in this system is related with the deformation of cubic structure due to defects.

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Authors and Affiliations

  1. Radio Isotopes Center, Tokyo Metropolitan University, Minami-osawa 1-1, Hachioji, Tokyo, 192-0364, Japan

    Kiyoshi Nomura & Shiro Kubuki

  2. Faculty of Science and Engineering, Meiji University, Higashi-mita 1-1-1, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan

    Kiyoshi Nomura, Shuhei Yamakawa, Miki Kasari & Yuya Koike

  3. Department of Physics, Shiga University of Medical Science, Tukimiwa 1-1, Seta, Shiga, 520-2192, Japan

    Akio Nakanishi

  4. Graduate School of Arts and Sciences, The University of Tokyo, Komaba 3-8-1, Megro-ku, Tokyo, 153-8902, Japan

    Atsushi Okazawa

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  1. Kiyoshi Nomura
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  2. Shuhei Yamakawa
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  3. Miki Kasari
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  4. Yuya Koike
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  5. Akio Nakanishi
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  6. Shiro Kubuki
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  7. Atsushi Okazawa
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Correspondence to Kiyoshi Nomura.

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This article is part of the Topical Collection Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME2019), 1-6 September 2019, Dalian, China

Edited by Tao Zhang, Junhu Wang and Xiaodong Wang

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Nomura, K., Yamakawa, S., Kasari, M. et al. Magnetic property and 57Fe Mössbauer analysis of dilute Fe and Nb codoped SrTiO3-δ(STO) perovskites. Hyperfine Interact 241, 6 (2020). https://doi.org/10.1007/s10751-019-1681-9

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  • DOI: https://doi.org/10.1007/s10751-019-1681-9

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