Magnetic Structure and dielectric properties of antiferromagnetic FeCrO3

We report the enhancement of N\'eel temperature of Cr2O3 by replacing 50% of Cr by Fe prepared by sol-gel method. The structural analysis by neutron diffraction has revealed that FeCrO3 belongs to a corundum structure (R-3c space group) with an antiferromagnetic spin structure having collinear...

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Main Authors R, Rajesh kumar, Dhanasekhar, C, Chaudhary, N. Vijay Prakash, Das, A, Venimadhav, A
Format Journal Article
LanguageEnglish
Published 25.11.2019
Subjects
Physics - Materials Science
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Summary:We report the enhancement of N\'eel temperature of Cr2O3 by replacing 50% of Cr by Fe prepared by sol-gel method. The structural analysis by neutron diffraction has revealed that FeCrO3 belongs to a corundum structure (R-3c space group) with an antiferromagnetic spin structure having collinear spins along a-axis with propagation vector k=0; the high-temperature magnetisation study indicated a N\'eel temperature of 560 K. The enhancement in N\'eel temperature has been attributed to the strong orbital hybridization that leads to change in nearest neighbor bond angle and bond distances. Impedance spectroscopy has revealed conduction mechanism at low temperature is due to the polaron hopping while extrinsic contributions from the Maxwell-Wagner dominant at high temperatures
DOI:10.48550/arxiv.1911.10730