Modification of magnetic ground state in Tb2Ni0. 90Si2. 94 by thermal annealing

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dc.contributor.authorPakhira, Sen_AU
dc.contributor.authorBhowmik, RNen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorRanganathan, Ren_AU
dc.contributor.authorMazumdar, Cen_AU
dc.date.accessioned2021-07-14T00:04:09Zen_AU
dc.date.available2021-07-14T00:04:09Zen_AU
dc.date.issued2020-09-01en_AU
dc.date.statistics2021-07-05en_AU
dc.description.abstractIn this work, we have investigated the thermal annealing effect on the physical properties of an AlB-type ternary intermetallic compound, TbNi0.90Si2.94, that undergoes spin freezing behaviour coexisting with spatially limited antiferromagnetic phase below 9.9 K in as-cast form. Thermal annealing effect is found to result in considerable changes in the magnetic ground state properties of the system. Though only one magnetic transition around 9.9 K is observed for as-cast compound, the annealed sample exhibits two distinct magnetic transitions; one around 13.5 K and another around 4 K. The magnetization measurements and zero field neutron diffraction study reveal that the high temperature transition is antiferromagnetic type, though of limited correlation length, while the low temperature transition corresponds to spin freezing behaviour. The ac susceptibility and heat capacity studies also confirm the existence of frustrated cluster glass state at lower temperature than the antiferromagnetic ordering temperature. Additionally, ac susceptibility data exhibits signature of an additional peak in the even lower temperature region (at 2.2 K for zero frequency) that tends to shift in opposite direction with frequency in contrast to that observed for conventional glassy transitions. The change in intrinsic local structural disorder of Ni and Si ions associated with annealing has been argued to be responsible for the different magnetic behaviour in as-cast and annealed samples. Published by Elsevier Ltd.en_AU
dc.identifier.articlenumber106874en_AU
dc.identifier.citationPakhira, S., Bhowmik, R. N., Avdeev, M., Ranganathan, R., & Mazumdar, C. (2020) Modification of magnetic ground state in Tb2Ni0.90Si2.94 by thermal annealing. Intermetallics, 124, 106874. doi:10.1016/j.intermet.2020.106874en_AU
dc.identifier.issn0966-9795en_AU
dc.identifier.journaltitleIntermetallicsen_AU
dc.identifier.urihttps://doi.org/10.1016/j.intermet.2020.106874en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11053en_AU
dc.identifier.volume124en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectX-ray diffractionen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectSpinen_AU
dc.subjectMagnetizationen_AU
dc.subjectAnnealingen_AU
dc.subjectSiliconen_AU
dc.subjectTerbiumen_AU
dc.subjectIntermetallic compoundsen_AU
dc.subjectNickel alloysen_AU
dc.titleModification of magnetic ground state in Tb2Ni0. 90Si2. 94 by thermal annealingen_AU
dc.typeJournal Articleen_AU
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