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Title: Occurrence of magnetoelectric effect correlated to the Dy order in Dy{sub 2}NiMnO{sub 6} double perovskite

Magnetic, dielectric, and ac conductivity as well as room temperature structural and Raman studies are performed on double perovskite Dy{sub 2}NiMnO{sub 6}. The crystal structure of the compound adopts monoclinic P2{sub 1}/n space group, where alternate Mn and Ni distorted octahedral are arranged in anti-phase a{sup −} a{sup −} b{sup +} order in Glazer notation. Magnetization studies show two magnetic transitions around 100 K and 20 K which are related to the ordering of transition and rare earth cations moment, respectively. Temperature dependent dielectric permittivity shows Havriliak-Negami type thermally activated dielectric relaxation. The ac conductivity at different temperature is found to follow Jonscher power law behavior. Time-temperature scaling of the conductivity spectra reveals that the charge transport dynamics is independent of temperature. Intriguingly, an anomaly in the dielectric constant is observed close to the order of Dy moment which indicates intrinsic magnetoelectric coupling. The hybridization between Dy and Ni/Mn is suggested to be correlated with the magnetoelectric coupling.
Authors:
; ; ; ;  [1]
  1. Department of Solid State Physics, Indian Association for the Cultivation of Science, 2A & B Raja S. C. Mullick Road, Kolkata 700 032 (India)
Publication Date:
OSTI Identifier:
22494725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CATIONS; CHARGE TRANSPORT; DIELECTRIC MATERIALS; DYSPROSIUM; DYSPROSIUM COMPOUNDS; MAGNETIC PROPERTIES; MAGNETIZATION; MANGANESE; MONOCLINIC LATTICES; NICKEL; PERMITTIVITY; PEROVSKITE; RELAXATION; SPACE GROUPS; SPECTRA; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K