Abstract
Multiferroic bulk YMnO3 sample was prepared through the solid state reaction method. After characterizing the sample structurally, a systematic investigation of magnetization and specific heat has been undertaken over a temperature range 2–300 K under different magnetic fields. Based on these studies, it has been found that the sample exhibited a paramagnetic to ferrimagnetic phase transition of spin glass type at ~42 K that could be attributed to spin cantering. The magnetic transition peak seen in the magnetic entropy change versus temperature curves became broader with increasing magnetic field. A large magnetic entropy change of ~1 J mol−1 K−1 was obtained under a magnetic field change of 0–10 T.
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Acknowledgements
The authors are grateful to DRDO, Govt. of India for supporting the present research work through a Research project (No. EPR/ER/0803750/M/01/1207). Second author thanks CSIR for providing fellowship. We also thank the Director, UGC-DAE CSR, Indore and Dr. D. Das, Dr. S. Chatterjee, and Mr. P. V. Rajesh, UGC-DAE CSR, Kolkata, Prof. R. K. Kotnala, Dr. Jyoti Shah, NPL, Delhi and Prof. D. Varshney, DAVV, Indore for their valuable discussions, encouragement, and guidance. We acknowledge the funding of DST, Government of India, for providing funds to the PPMS and MPMS facility at CSR India.
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Kumar Swamy, N., Pavan Kumar, N., Reddy, P.V. et al. Specific heat and magnetocaloric effect studies in multiferroic YMnO3 . J Therm Anal Calorim 119, 1191–1198 (2015). https://doi.org/10.1007/s10973-014-4223-3
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DOI: https://doi.org/10.1007/s10973-014-4223-3