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Effect of Nd substitution on magnetoelectric properties of Sm2BaCuO5

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Abstract

We have investigated the magnetic and magnetoelectric properties of solid solutions in the green phase region of the 211-cuprate system Sm2−xNdxBaCuO5 (x = 0.2, 0.4 and 0.6). These compounds crystallize in the centrosymmetric orthorhombic (Pnma) structure. Upon substitution of Nd, the antiferromagnetic ordering temperature of Cu2+ ions (TN1 = 24 K) and Sm3+/Nd3+ ions (TN2 = 5 K) remain unchanged. Dielectric anomalies appear at TN1 under applied magnetic field, whose magnitude increases with field, and at TN2 = 5 K under zero magnetic field for all three compounds. Applied magnetic fields induce electric polarization at TN1 that vary linearly with magnetic fields. While the polarization decreases below TN2 in x = 0 and 0.2, it is enhanced for the samples with x = 0.4 and 0.6. Interestingly, an additional anomaly is observed in dielectric and electric polarization data at 23 K for the composition x = 0.4 under the magnetic fields. Our study reveals that the substitution of Nd significantly modifies the electrical properties due to changes in the interactions between 4f–3d moments.

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Acknowledgements

We would like to acknowledge Sheikh Saqr Laboratory (SSL) and International Centre for Materials Science (ICMS) at Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) for various experimental facilities. SM acknowledges JNCASR for providing research fellowship (JNC/S0692). PY acknowledges UGC grants commission for the Ph.D. fellowship (Award No. 2121450729). AS acknowledges BRICS research project, Department of Science and Technology, Government of India for a research grant (Sl. No. DST/IMRCD/BRICS/PilotCall2/EMPMM/2018(G)).

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  1. School of Advanced Materials, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064, India

    Swarnamayee Mishra, Premakumar Yanda & A Sundaresan

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  1. Swarnamayee Mishra
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  2. Premakumar Yanda
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  3. A Sundaresan
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Correspondence to A Sundaresan.

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This article is part of the Topical Collection: SAMat Focus Issue.

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Mishra, S., Yanda, P. & Sundaresan, A. Effect of Nd substitution on magnetoelectric properties of Sm2BaCuO5. Bull Mater Sci 43, 305 (2020). https://doi.org/10.1007/s12034-020-02238-9

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