Quantum critical behaviour in the (Cr97.8Si2.2)(100-y)Moy alloy system

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dc.contributor.authorSheppard, CJen_AU
dc.contributor.authorPrinsloo, AREen_AU
dc.contributor.authorFernando, PRen_AU
dc.contributor.authorVenter, AMen_AU
dc.contributor.authorStrydom, AMen_AU
dc.contributor.authorPeterson, VKen_AU
dc.date.accessioned2013-11-08T02:38:39Zen_AU
dc.date.available2013-11-08T02:38:39Zen_AU
dc.date.issued2013-05-07en_AU
dc.date.statistics2013-11-08en_AU
dc.description.abstractThe Cr-Si system offers an ideal reference alloy as a case study to follow the evolution of the well-known first-order magnetic transition in dilute Cr-Si by doping with Mo, which is iso-electronic with Cr. This alloy system, in addition, then also offers the opportunity to search for effects of quantum criticality (QC) associated with the process of driving the Neel transition temperature (T-N) to zero. Previous investigations on the ternary (Cr97.8Si2.2)(100-y)Mo-y alloy system (0 <= y <= 9) indicated possible quantum critical behaviour at a critical concentration y(c) approximate to 3.8. The present paper extends these studies to additional concentrations in the alloy series, as well as to explore key indicators of QC, such as Hall coefficient (R-H) and magnetic susceptibility (chi) measurements. Recent results indicate the possible existence of two critical points in the (Cr97.8Si2.2)(100-y)Mo-y alloy system. The first critical point at y(c1) is postulated to be related to the concentration where the first-order transition gives way to a second-order-like continuous magnetic phase transition. Behaviour normally associated with QC is observed at the second critical concentration y(c2), accompanying a transition to paramagnetism. © 2013 American Institute of Physics.en_AU
dc.identifier.articlenumber17E7146en_AU
dc.identifier.citationSheppard, C. J., Prinsloo, A. R. E., Fernando, P. R., Venter, A. M., Strydom, A. M., & Peterson, V. K. (2013). Quantum critical behaviour in the (Cr97.8Si2.2)(100-y)Moy alloy system. Journal of Applied Physics, 113 (17), 17E7146. doi:10.1063/1.4798614en_AU
dc.identifier.govdoc5087en_AU
dc.identifier.issn0021-8979en_AU
dc.identifier.issue17en_AU
dc.identifier.journaltitleJournal of Applied Physicsen_AU
dc.identifier.urihttp://dx.doi.org/10.1063/1.4798614en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4905en_AU
dc.identifier.volume113en_AU
dc.language.isoenen_AU
dc.publisherAmerican Institute of Physicsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectChromiumen_AU
dc.subjectSiliconen_AU
dc.subjectBehavioren_AU
dc.subjectParamagnetismen_AU
dc.titleQuantum critical behaviour in the (Cr97.8Si2.2)(100-y)Moy alloy systemen_AU
dc.typeJournal Articleen_AU
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