Effect of Ni2+ dopant on the grain size, ferroelectric, dielectric, and piezoelectric properties of PMN-based ternary relaxor ceramic (PMN–PNN–PT)

Augustine, P and Anjaly, CL and Ravindran, K and Sivan, V (2022) Effect of Ni2+ dopant on the grain size, ferroelectric, dielectric, and piezoelectric properties of PMN-based ternary relaxor ceramic (PMN–PNN–PT). In: Applied Physics A: Materials Science and Processing, 128 (8).

PDF app_phy_A_128-8_2022.pdf - Published Version Restricted to Registered users only Download (3MB) | Request a copy

Abstract

Lead magnesium niobate (PMN)-based relaxor ferroelectrics are very versatile and have emerged as highly promising materials for research in various fields. Hence, an investigation of the structural and electrical properties exhibited by the PMN-based ternary system is carried out. The magnetic element-doped ternary composition (1 − x)(0.67PMN-0.33PT) − x(0.64PNN-0.36PT), particularly, the composition PbMg0.1733Ni0.04266Nb0.432Ti0.352O3, is studied and compared with that of the binary parent relaxor system PMN–PT at morphotropic phase boundary (MPB). The ferroelectric hysteresis response exhibited a saturation polarization Psat = 19.83 μC/cm2, remnant polarization Pr = 13.60 μC/cm2, and coercive field, EC = 10.08 kV/cm. However, the ferroelectric and dielectric response of the ternary ceramic was lower than that of the parent binary PMN–PT system in the MPB compositions, and the same was confirmed from the calculated squareness factor (Rsq = 0.7783) and relaxor exponent (γ = 1.6692 at 1 kHz). The observed reduction in the functional response displayed by the ternary ceramic can be attributed to a decrease in the relative percentage of the rhombohedral phase due to the incorporation of magnetic element Ni2+ in the unit cell and the absence of bimodular grain structure in the ternary ceramic system as evident from the structural and microstructural analysis.

Item Type:	Journal Article
Publication:	Applied Physics A: Materials Science and Processing
Publisher:	Springer Science and Business Media Deutschland GmbH
Additional Information:	The copyright for this article belongs to the Springer Science and Business Media Deutschland GmbH.
Keywords:	Ferroelectric materials; Ferroelectricity; Grain size and shape; Niobium compounds; Polarization, Ceramic; Dielectric and piezoelectric properties; Dielectrics property; Ferroelectric property; Ferroelectrics dielectrics; Grainsize; Magnetic elements; Morphotropic phase boundaries; Relaxor ferroelectric; Relaxors, Magnetism
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	22 Aug 2022 12:14
Last Modified:	22 Aug 2022 12:14
URI:	https://eprints.iisc.ac.in/id/eprint/76150

Actions (login required)

View Item