Study on the field-cooling induced magnetic interactions in Gd-doped NiO nanoparticles

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dc.contributor.authorGokul, B.
dc.contributor.authorSaravanan, P.
dc.contributor.authorMatheswaran, P.
dc.contributor.authorPandian, M.
dc.contributor.authorSathyamoorthy, R.
dc.contributor.authorAsokan, K.
dc.contributor.authorVinod, Vellora Thekkae Padil
dc.contributor.authorČerník, Miroslav
dc.date.accessioned2019-10-03T08:57:59Z
dc.date.available2019-10-03T08:57:59Z
dc.date.issued2020-01-01
dc.description.abstractWe herein investigate the novel magnetic interactions, such as exchange bias (EB), memory effect (ME) and magnetic relaxation dynamics (MRD) in NiO and 10 wt% Gd doped NiO nanoparticles synthesized by hydrothermal process. X-ray diffraction studies showed crystallization of face-centered-cubic structure for both NiO and Gd-doped NiO nanoparticles. Transmission electron microscopy analysis revealed a spherical morphology for both samples and their mean particle sizes were estimated as 24.5 and 10.3 nm for the pure and Gd-doped NiO nanoparticles, respectively. SQUID magnetic measurements demonstrated the occurrence of large EB coupling: 1.04 and 0.767 kOe; and enhanced coercive fields: 1.75 and 1.27 kOe, for the pure and Gd-doped NiO nanoparticles, respectively. The size-dependent magnetic properties such as, EB, ME and MRD is found to vanish at the average blocking temperature and interestingly, these properties set-in on cooling the samples at 5 K under applied field of 5 kOe. The surface defects such as oxygen vacancies and the Gd2O3 impurity phase played a significant role in determining the EB and ME characteristics of NiO nanoparticles.cs
dc.format.extent6 strancs
dc.identifier.WebofScienceResearcherIDE-1079-2016 Vinod, Vellora Thekkae Padil
dc.identifier.doi10.1016/j.jmmm.2019.165713
dc.identifier.orcid0000-0002-0816-526X Vinod, Vellora Thekkae Padil
dc.identifier.urihttps://dspace.tul.cz/handle/15240/153828
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0304885319314131
dc.language.isocscs
dc.publisherELSEVIER, RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
dc.relation.ispartofJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
dc.subjectNickel oxidecs
dc.subjectNiOcs
dc.subjectSuperparamagnetismcs
dc.subjectExchange biascs
dc.subjectMemory effectcs
dc.titleStudy on the field-cooling induced magnetic interactions in Gd-doped NiO nanoparticlescs
dc.typeProceedings Paper
local.article.numberUNSP 165713
local.event.edate2018-09-07
local.event.locationMainz, GERMANY
local.event.sdate2018-09-03
local.event.title9th Joint European Magnetic Symposia (JEMS)
local.identifier.publikace6819
local.relation.volume493
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