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Composition dependent magnetic and ferroelectric properties of hydrothermally synthesized GdFe1−xCrxO3 (0.1 ≤ x ≤ 0.9) perovskites

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Abstract

The hydrothermal synthesis and magnetic, dielectric and ferroelectric property characterization of ABO3-perovskite GdFe1−xCrxO3 (0 < x < 1) are reported. The mineralizer KOH plays a critical role in the perovskite structure of the sample. The Fe/Cr ratio of the final crystal is controlled by the alkalinity in the initial reaction mixtures. The lattice parameters and magnetic ordering transition temperature have a close relationship with the Fe/Cr ratio. The temperature dependent magnetic properties of GdFe1−xCrxO3 (0 < x < 1) samples show a close relationship with substituent ratios of Cr3+. The occurrence of ferromagnetic behavior in all of the as-prepared samples comes from the coexistence of canted-antiferromagnetism due to the double exchange effect of Fe–O–Fe and Cr–O–Cr and ferromagnetism due to superexchange interaction of Fe–O–Cr. A large spontaneous polarization was observed in GdFe1−xCrxO3 at room temperature, exhibiting a clear ferroelectric hysteresis loop, which indicates the ferroelectric behavior in this system. This work not only provides an effective route to the controllable synthesis of B-site doped REFe1−xCrxO3 perovskite structure materials, but also presents a comprehensive study of the tunable effect of ionic doping on ferroelectric properties.

Graphical abstract: Composition dependent magnetic and ferroelectric properties of hydrothermally synthesized GdFe1−xCrxO3 (0.1 ≤ x ≤ 0.9) perovskites

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Publication details

The article was received on 04 Jan 2017, accepted on 01 Apr 2017 and first published on 03 Apr 2017


Article type: Paper
DOI: 10.1039/C7DT00032D
Citation: Dalton Trans., 2017, Advance Article
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    Composition dependent magnetic and ferroelectric properties of hydrothermally synthesized GdFe1−xCrxO3 (0.1 ≤ x ≤ 0.9) perovskites

    Y. Qiao, Y. Zhou, S. Wang, L. Yuan, Y. Du, D. Lu, G. Che and H. Che, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT00032D

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