Hidden magnetism, nonlinear magnetodielectric coupling, and large multicaloric effect in multiferroic L -type Fe2 (Mo O4)3

P. Athira, Ajay Tiwari, M. J. Hsieh, J. Y. Lin, Nidhi Puri, C. W. Wang, C. H. Prashanth, C. Dhanasekhar, C. L. Huang, H. D. Yang, Krishnamurthy Jyothinagaram, D. Chandrasekhar Kakarla

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3 Citations (Scopus)

Abstract

Fe2(MoO4)3 is a well-established L-type ferrimagnetic (L-FIM) material with field-induced magnetic ordering (TN2) and multiferroic properties below TN1 (around 12 K). In this study, we investigate the magnetic properties of Fe2(MoO4)3 through temperature- and field-dependent ac and dc magnetic susceptibility χ(T) measurements. Isothermal magnetization data reveal an additional metamagnetic transition (HC2) beyond the existing boundary between L-FIM and multiferroic phases (HC1). Frequency-dependent ac magnetic susceptibility data demonstrate reentrant-spin-glass-like behavior below TN1, with a critical temperature (Tg0) of 6.2 K. Notably, a nonlinear magnetodielectric response and concurrent anomalies in M(H) at the two metamagnetic transitions (HC1 and HC2) allude to a profoundly intertwined magnetoelectric (ME) nature. A finite nonlinear ME effect (αME) of about 0.56 ps/m is comparable to that of ME materials such as NdCrTiO5 and MnGa2O4. The temperature-dependent adiabatic temperature change (ΔTm) due to the contribution of magnetic spin entropy exhibits a small value (approximately 0.8 K) with an oscillatory-like magnetocaloric effect. Remarkably, the adiabatic temperature change (ΔTME) owing to magnetoelectric coupling is quite large (5.2 K under a 7 T magnetic field) near TN2. The tunability of TN2 with temperature and magnetic field strength represents a unique multicaloric medium whose temperature and field parameters can be easily adjusted for potential cryogenic applications near liquid-helium temperatures.

Original languageEnglish
Article number054025
JournalPhysical Review Applied
Volume21
Issue number5
DOIs
Publication statusPublished - 2024 May

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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