Studies on structural, electrical and magnetic properties of Dy-doped BiFeO3 thin films

Yan, Xia; Tan, Guoqiang; Liu, Wenlong; Ye, Wei; Xia, Ao; Ren, Huijun

doi:10.1007/s10854-015-3208-8

Cited by 5 publications

(1 citation statement)

References 34 publications

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“…Altogether, this influences the alignment of the magnetic moments in agreement with the externally applied field which is manifested by narrowing of hysteresis at low fields. The amount of reduction in the hysteresis width will depend on the magnitude of coupling (Morales et al 1997;Bennett and Della 2005;Yan et al 2015). Furthermore, the magnetization has been analyzed using Arrott plots as shown in Fig.…”

Section: Magnetizationmentioning

confidence: 99%

Role of La substitution on structural, optical, and multiferroic properties of BiFeO3 nanoparticles

Kumari

Aljawfi

et al. 2021

Appl Nanosci

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The present work reports the influence of Lanthanum (La) substitution on the structural, optical, electrical, and magnetic properties of bismuth ferrite (BiFeO 3 ) nanoparticles (NPs). The compositions of Bi 1−x La x FeO 3 (0% < x < 20%) NPs, with 5% Bi-excess, were synthesized through sol-gel conventional route. The XRD results suggest the formation of rhombohedral perovskite structure (R3c space group) along with a minor secondary phase. The crystallite size calculated from XRD and FESEM was observed to decrease from 60.0 to 40.0 nm with an increase in La content. The bandgap calculated using UV-Vis spectroscopy was found to decrease with La doping, and PL spectroscopy infers formation of defects in La-BFO NPs. The P-E loop studies reveal that La-doped BFO exhibits ferroelectric behavior at room temperature. The various parameters such as spontaneous polarization, dielectric constant, and distribution parameter of relaxation time measured from the electrical investigation were found to increase up to 5% La doping BFO then start decreasing with further increase in the La content in BFO. The impedance spectra of La-BFO was fitted using the theory of Cole-Cole with R(C(R(QR)))(CR) model. It is observed that La-concentration above 5% generates excess space charge which might cross the threshold to start conduction resulting in degrading of multiferroic properties. The DC magnetization study revealed the ferromagnetic behavior of the samples at room temperature. It is observed that La substitution affects the shape of the magnetization hysteresis curve beyond 5% La-concentration, and transforming it to a neck-like formation providing evidence for the spin-canting effect in the samples. These results make La-doped BiFeO 3 NPs a propitious candidate for the multiferroic applications like highdensity data storage devices and supercapacitors.

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Section: Magnetizationmentioning

confidence: 99%