Effect of Nd substitution on magnetoelectric properties of Sm2BaCuO5

Mishra, Swarnamayee ; Yanda, Premakumar ; Sundaresan, A (2020) Effect of Nd substitution on magnetoelectric properties of Sm2BaCuO5 Bulletin of Materials Science, 43 (1). ISSN 0250-4707

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Official URL: http://doi.org/10.1007/s12034-020-02238-9

Related URL: http://dx.doi.org/10.1007/s12034-020-02238-9


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.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
ID Code:119969
Deposited On:21 Jun 2021 04:35
Last Modified:21 Jun 2021 04:35

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