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Magnetic Phase Separation in Diluted Magnetic System: Zn1−x Fe x O

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

Single-phase diluted magnetic systems Zn1−x Fe x O have been prepared by chemical route. Structural and spectroscopic (UV–Vis and Mössbauer) studies indicate the incorporation of Fe3+ ions in the lattice sites. The UV–Vis results point to a systematic increase in the band gap with increasing Fe doping. The room temperature magnetization of Zn1−x Fe x O indicates a paramagnetic behavior which is in accordance with the Mössbauer results, illustrating quadrupolar doublet. At low temperature, the zero-field-cooled (ZFC) magnetization shows a cusp and this temperature increases systematically with decreasing particle size. The weak exchange bias effect manifested by a M–H loop shift is observed for x = 0.03. This shift is accompanied by the enhancement of coercivity. The dc magnetization results suggest the coexistence of ferromagnetic and antiferromagnetic exchange interactions for low doping of Fe, i.e., for x = 0.03.

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Acknowledgements

The authors thank DST, Government of India, for developing instrumental facilities like X-ray powder diffractometer (Bruker D8) and FE-SEM (JEOL, JSM-7610F) under FIST programme at Jadavpur University and low temperature high magnetic field facility at UGC-DAE CSR, Kolkata Centre. S. Sarkar, A. Mondal and N. Giri wish to thank DST for INSPIRE fellowship scheme.

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Authors and Affiliations

  1. Department of Physics, Jadavpur University, Kolkata, 700 032, India

    Archita Mondal, Sanchari Sarkar, Neepamala Giri & Ruma Ray

  2. UGC-DAE Consortium for Scientific Research, Kolkata Centre, Sector III, LB-8, Salt Lake, Kolkata, 700098, India

    Souvik Chatterjee

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  1. Archita Mondal
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Correspondence to Ruma Ray.

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Mondal, A., Sarkar, S., Giri, N. et al. Magnetic Phase Separation in Diluted Magnetic System: Zn1−x Fe x O. Acta Metall. Sin. (Engl. Lett.) 30, 521–527 (2017). https://doi.org/10.1007/s40195-017-0530-6

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  • DOI: https://doi.org/10.1007/s40195-017-0530-6

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