Antisymmetric exchange interaction, magnetoelectric and magnetodielectric response in structurally distorted G-type antiferromagnetic perovskite: La0.9Gd0.1FeO3

• Published in: The Journal of physics and chemistry of solids Vol. 75; no. 3; pp. 374 - 378
• Main Authors: Ghosh, Arijit, Masud, Md.G., Dey, K., Chaudhuri, B.K.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2014
• Subjects: A. Oxides; D. Crystal structure; D. Dielectric properties; D. Ferroelectricity; D. Magnetic properties; Devices; Distortion; Ferromagnetism; Filing; Frequency ranges; Magnetic fields; Magnetization; Perovskite structure; D. Ferroelectricity; D. Dielectric properties; D. Magnetic properties; A. Oxides; D. Crystal structure
• ISSN: 0022-3697; 1879-2553
• DOI: 10.1016/j.jpcs.2013.11.003

Detailed structural analysis of the X-Ray diffraction pattern of La0.9Gd0.1FeO3 (LGFO) synthesized via the solid state reaction reveals distorted perovskite structure. Magnetization studies show a characteristic of weak ferromagnetism which is believed to be induced by canted anti-ferromagnetically coupled spins. When explored in a wide temperature and frequency range, AC electrical properties reveal interesting relaxation mechanisms. LGFO exhibits relatively high dielectric permittivity (ε′~4×103) close to room temperature. Temperature dependent magneto-dielectric response appears (magnetodielectric ~−5.5%) even at low magnetic field ~5kOe. Attractive electrical, magnetic and magnetoelectric properties of the present LGFO at relatively higher temperature makes it a very promising material for application in devices. •We have prepared chemically and structurally single phase bulk oxide material using solid state reaction route.•A detailed structural analysis has been done.•Detailed dielectric analysis revealed multiple relaxations.•The sample is found to be magneto-electrically active near room temperature.•Dzyaloshinskii–Moriya interaction together with structural deformation is found to be responsible for the strong magneto-electric coupling.