Isostructural changes in h-YMnO3 by Fe-substitution: effects on multiferroicity
Abstract
Iron-substitution in hexagonal YMnO3 causes isostructural intra-lattice changes exceeding those of the lattice cell, contrary to the effects of non-magnetic B-site dopants. Magnetization M(T) evidence antiferromagnetic (AFM) ordering of the specimens with little weak ferromagnetism, and the metrices of exchange interaction suppress with Fe-doping, attributed to the lengthening of the Mn-O planar bond lengths. Ferroelectric (FE) P-E hysteresis loops reflect subdued and conductive ferroelectricity with increased Fe-substitution, traced to the reduced polyhedral buckling. Dielectric {\epsilon}'(T) results showing highly doping-dependent anomaly at the N\'eel temperature signify strong magnetostrictive tunability and imply linear magneto-electric (ME) coupling. We recognize a correspondence of the structure-property changes versus Fe-doping, with the reported magnetostrictive effects upon cooling below TN. Correlations of AFM-FE-ME properties with their relevant microstructural attributes underline the spin-lattice-dipole coupling and provide significant characteristic figures.
Cite
@article{arxiv.1204.4800,
title = {Isostructural changes in h-YMnO3 by Fe-substitution: effects on multiferroicity},
author = {Sonu Namdeo and A. M. Awasthi},
journal= {arXiv preprint arXiv:1204.4800},
year = {2014}
}
Comments
A later (revised) submission of this work (arXiv:1303.3398, titled 'Inestigation of charge states and multiferroicity in Fe-doped YmnO3'), which has also been published as a journal article (J. Appl. Phys. 113, 104101 (2013); doi: 10.1063/1.4794831) renders this arXiv article (arXiv:1204.4800) redundant and confusing/irrelevant, and is therefore requested to be removed for the arXiv records