Repository of University of Nova Gorica

Show document
A+ | A- | SLO | ENG

Title:Unusual magnetodielectric effects in La2CuMnO6 induced by a dynamic crossover in dielectric relaxation at TC
Authors:Pezhumkattil Palakkal, Jasnamol (Author)
Raj Sankar, Cheriyedath (Author)
Parayancheri Paulose, Ajeesh (Author)
Valant, Matjaž (Author)
Badasyan, Artem (Author)
Raama Varma, Manoj (Author)
Files:This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Language:English
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:A series of fixed frequency dielectric measurements shows dielectric relaxation in La2CuMnO6, with a dynamic (Arrhenius to Arrhenius) crossover at TC. The external magnetic field alters the relaxation parameters in the vicinity of crossover and induces an unusual trend in the magnetodielectric coupling around TC. A large magnetodielectric coupling of 55% (at 68 K, 4 kHz) and 61% (at 105 K, 285.8 kHz) under a small magnetic field of 5 kOe is discovered. Presence of ferromagnetic short-range correlations above TC and a sign reversal of magnetoresistance around TC are observed. Specific heat analysis revealed the presence of ferromagnetic, variable range hopping active charge localized state. The presence of ferromagnetic short-range correlations and the influence of a core-grain dominated magnetoresistance on the Maxwell-Wagner interfacial polarization are responsible for the observed large magnetodielectric effect. Both the magnetic ordering and external magnetic field control the electric dipole relaxation in the material.
Keywords:Double perovskite Griffiths-like phase Dielectric Magnetoresistance Magnetodielectric
Year of publishing:2018
Number of pages:226-233
Numbering:100, 2017
COBISS_ID:4979195 Link is opened in a new window
URN:URN:SI:UNG:REP:AF4I0BND
DOI:10.1016/j.materresbull.2017.12.027 Link is opened in a new window
License:CC BY-NC-ND 4.0
This work is available under this license: Creative Commons Attribution Non-Commercial No Derivatives 4.0 International
Views:2041
Downloads:0
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:Document is not linked to any category.
:
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.

Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Record is a part of a journal

Title:Materials Research Bulletin
Publisher:Elsevier
ISSN:0025-5408
Year of publishing:2018

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Funding Programme:Sofinanciranje znanstvenoraziskovalnega sodelovanja med RS in Indijo
Project no.:BI-IND/15-17-002
Name:Dopiranje dvojnih perovskitov z elektronskimi vrzelmi za senzorske in spintronske aplikacije
Acronym:
Project ID:info:eu-repo/grantAgreement/ARRS/Sofinanciranje%20znanstvenoraziskovalnega%20sodelovanja%20med%20RS%20in%20Indijo/BI-IND%2F15-17-002

Back