Ferroic ordering and charge‐spin‐lattice order coupling in Gd‐doped Fe 3 O 4 nanoparticles relaxor multiferroic system

Abstract We investigated the effect of gadolinium doping (1‐5 at.%) on the magnetic and dielectric properties of Fe 3 O 4 nanoparticles, synthesized by the chemical co‐precipitation technique, primarily to understand the onset of multifunctional properties such as ferroelectricity and magnetodielect...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2017-04, Vol.100 (4), p.1534-1541
Main Authors: Laha, Suvra S., Abdelhamid, Ehab, Arachchige, Maheshika P., Kumar, Ajay, Dixit, Ambesh
Format: Article
Language:English
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Summary:Abstract We investigated the effect of gadolinium doping (1‐5 at.%) on the magnetic and dielectric properties of Fe 3 O 4 nanoparticles, synthesized by the chemical co‐precipitation technique, primarily to understand the onset of multifunctional properties such as ferroelectricity and magnetodielectric coupling. The substitution of larger Gd 3+ ions at smaller Fe 3+ octahedral sites in inverse spinel Fe 3 O 4 has significantly influenced the morphology, average crystallite size, and more importantly, the magneto‐crystalline anisotropy and saturation magnetization. The magneto‐crystalline anisotropy and the saturation magnetization decreases substantially, however, significant increase in the average crystallite size is observed upon Gd doping. Furthermore, temperature‐dependent dielectric studies suggest that these nanoparticle systems exhibit relaxor ferroelectric behavior, with much pronounced ferroelectric polarization moment recorded for 5 at.% Gd doped Fe 3 O 4 as compared to its undoped counterpart.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.14739