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Evolution of Crystal Structure and Magnetic Properties of Y2Zr2−xMnxO7 (x = 0.0, 0.1, 0.2) Family of Pyrochlore Oxides

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Abstract

The present article reviews the structural and magnetic properties of Y2Zr2−xMnxO7 compounds with respect to the extent of Mn doping. All the samples are single phase and crystallize in the cubic system with Fd-3m space group. The stability of the pyrochlore structure was established by Rietveld structural refinements. The lattice parameter and cell volume decrease with Mn substitution because of the smaller ionic radius of Mn4+ than Zr4+. The zero field-cooled (ZFC) and field-cooled (FC) curves for Mn-doped samples diverge at low temperature which is possibly due to spin-glass transition. Both the Mn-doped phases exhibit anti-ferromagnetic behavior, which could be due to the presence of super-exchange (SE) Mn4+–O2−–Mn4+ interactions. Moreover, small magnetic hysteresis loops are observed for the Mn-doped phases suggesting the presence of weak ferromagnetic interactions.

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Acknowledgments

Authors are obliged to Director, AMRC, IIT Mandi, for XRD analysis. Special thanks to Prof. R. Chandra, IIC, IIT Roorkee, for SEM and EDX analyses and Director, IISER, Bhopal, for carrying out magnetic measurements.

Funding

CSIR, New Delhi, provided financial assistance, vide Ref. No. 09/100(0189)/2015-EMR-I.

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  1. Department of Chemistry, University of Jammu, Jammu, India

    Mukesh Kumar Verma, Suman Sharma, Nisha Choudhary, Narayan Dutt Sharma & Devinder Singh

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Correspondence to Devinder Singh.

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Verma, M.K., Sharma, S., Choudhary, N. et al. Evolution of Crystal Structure and Magnetic Properties of Y2Zr2−xMnxO7 (x = 0.0, 0.1, 0.2) Family of Pyrochlore Oxides. J Supercond Nov Magn 34, 435–441 (2021). https://doi.org/10.1007/s10948-020-05678-w

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