Room temperature magnetoelectric coupling and relaxor-like multiferroic nature in a biphase of cubic pyrochlore and spinel
作者： Raja Altaf U Rahman , D. E. Jain Ruth , Sujoy Chakravarty , Peter Schmid-Beurmann , Dhayanithi Duraisamy
DOI: 10.1063/1.5081895
关键词: Phase (matter) 、 Spinel 、 Magnetization 、 Condensed matter physics 、 Pyrochlore 、 Dielectric 、 Multiferroics 、 Raman spectroscopy 、 Materials science 、 Bismuth
摘要: The search for multiferroic order in a single phase of bismuth pyrochlore has been unsuccessful so far. In this direction, our study unveiled the capability biphase and spinel hosting at room temperature. A complex oxide cubic crystals acquired Bi2O3-Nb2O5-2MnCO3-Fe2O3 system revealed (Fe1.59(3)Mn1.39(3)O4.26(7)) intergrown dense (Bi1.35(1)Fe0.64(1)Nb1.26(1)Mn0.75(1)O6.39(5)) matrix. average composition components investigated was determined using an electron probe microanalyzer (EPMA). structural features indicated presence large ionic displacements within as seen from appearance 442 reflection X-ray diffraction pattern infrared active mode ∼64 cm−1 Raman spectrum recorded single-phase (Bi1.35(1)Fe0.64(1)Nb1.26(1)Mn0.75(1)O6.39(5)), suggested thorough EPMA microstructural analysis, exhibited broad dielectric relaxation overall paramagnetic behavior. observation disordered superparamagnetism well conformed to that relaxorlike behavior Moreover, self-biased magnetoelectric voltage coefficients 0.60 mV/cm Oe 100 Hz 5.54 mV/cm Oe 1 kHz were detected between magnetization electric polarization Therefore, composite such with inherent property strong spin–orbit spin–lattice coupling will be interesting theoretical experimental point view arena magnetoelectrics.The (Bi1.35(1)Fe0.64(1)Nb1.26(1)Mn0.75(1)O...
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