Abstract
The structural and magnetic properties of Gd2−xNdxPdSi3 (x = 0, 0.75, 1, 2) have been studied using X-ray diffraction (XRD), exchange bias and magnetization measurements. The end compounds (x = 0, 2) along with the solid solutions of them are found to crystallize in the hexagonal superstructure having space group P6/mmc. The rare-earth (RE) ions are occupying at two different crystallographically inequivalent sites (2b and 6h), which is similar to all ordered members of the RE2PdSi3 series. The absence of chemical phase separation and formation of true solid solutions are confirmed by the XRD analysis. No signature of exchange bias has been observed signifying the absence of coexistence of magnetic phases. The origin of complex magnetic behaviour in Gd2−xNdxPdSi3 is observed due to the separate magnetic ordering and two available crystallographic sites for magnetic ion. The spin-glass behaviour near ferromagnetic transition in Nd2PdSi3 and anomalous bifurcation in zero-field-cooled and field-cooled magnetization curves in Gd2PdSi3 originates from the proximity and overlap of the transition temperatures of the two RE magnetic ions present in two inequivalent sites, and strongly correlated to the interatomic and intra-atomic distances between RE atoms occupying two crystallographic sites.
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Acknowledgements
We thank Jawaharlal Nehru Centre for Advanced Scientific Research, Sheikh Saqr Laboratory and Department of Science and Technology (DST), India, for financial support (Grant SB/FT/CS-07/2011). TP thanks DST for project fellowship (Grant SB/FT/Cs-07/2011), AKS thanks JNCASR for research fellowship and SR thanks UGC for research fellowship. SCP thanks DST for SwarnaJayanti Fellowship (DST/SJF/CSA-02/2017-18). We are grateful to Prof C N R Rao for his constant support and encouragement.
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Paramanik, T., Singh, A.K., Roy, S. et al. Structure and physical properties of the solid solution Gd2–xNdxPdSi3 (x = 0, 0.75, 1, 2). Bull Mater Sci 43, 317 (2020). https://doi.org/10.1007/s12034-020-02148-w
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DOI: https://doi.org/10.1007/s12034-020-02148-w