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Structural evolution and magnetic properties of Bi0.86Nd0.14Fe1-xTixO3 ceramics

Nguyen, Thi Minh Hong and Nguyen, Dang Co and Ho, Thi Anh and Bui, Dinh Tu (2021) Structural evolution and magnetic properties of Bi0.86Nd0.14Fe1-xTixO3 ceramics. Materials Chemistry and Physics (124857). ISSN 0254-0584

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Abstract

Ceramic Bi0.86Nd0.14Fe1-xTixO3 (0.02 ≤ x ≤ 0.1) compounds were prepared to study the structural evolution, microstructure, and magnetic properties. The structural analysis by X-ray diffraction and Rietveld refinement revealed a coexistence of the polar rhombohedral (R3c symmetry) and antipolar orthorhombic (Pbam symmetry) structures over the entire composition range, while Raman scattering spectroscopy detected not only the phonon vibrations of the R3c and Pbam but also the Pbnm symmetries. The microstructure investigation showed the small and large grain size regions corresponding to the R3c and Pbam/Pbnm phases, respectively. The dependence of magnetization on the Ti concentration suggested that the weak ferromagnetism observed in the compounds arised from the intrinsic collapse of cycloidal order rather than defect-induced magnetism. The magnetic aging observed at room temperature was explained on the basic of phase switching and spin frustration at the phase boundary. The influence of phase switching induced by an external electric field on the magnetic properties was also studied to reveal the contribution of phase boundary spins to the net magnetization.

Item Type: Article
Subjects: Engineering Physics
ISI-indexed journals
Divisions: Faculty of Engineering Physics and Nanotechnology (FEPN)
Depositing User: PhD. Co Dang Nguyen
Date Deposited: 21 Jun 2021 07:06
Last Modified: 21 Jun 2021 07:06
URI: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/4500

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