Magnetic properties of Dy 1-x Sr x CoO 3-δ (x = 0.67 to 0.95)

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dc.contributor.authorGoossens, DJen_AU
dc.contributor.authorWilson, KFen_AU
dc.contributor.authorJames, Men_AU
dc.date.accessioned2021-09-06T05:29:55Zen_AU
dc.date.available2021-09-06T05:29:55Zen_AU
dc.date.issued2021-02-04en_AU
dc.date.statistics2021-08-24en_AU
dc.description.abstractThe AC magnetic susceptibility of Dy1-xSrxCoO3-δ has been measured from 17 to 320 K for a range of samples, x = 0.67 to 0.95. These results have shown that for x = 0.95 the systems enters a spinglass state at approximately 131K on cooling. This is demonstrated by a large cusp in the imaginary susceptibility, indicating the onset of time-dependent effects. For smaller x, the system enters a magnetically ordered state at approximately 300K. This state shows evidence for a spin state transition in the Co ions at around 120K [1], but no evidence of a spin-glass phase. Structurally, the system is tetragonal, I4/mmm, becoming closer to cubic as x increases, until at x = 0.95 the system is metrically cubic. Further, as x increases the fraction of Co4+ in the system also increases, as shown by TGA. At x = 0.95 over 50% of the Co sites are 4+, and the mixture of exchange interactions resulting is thought to give rise to the spinglass state. At smaller x the system appears weakly ferromagnetic, probably due to local ferromagnetic clusters [2], with the Dy moments remaining paramagnetic to temperatures below the instrumental limit.en_AU
dc.identifier.citationGoossens, D. J., Wilson. K. F., & James, M. (2004). Magnetic Properties of Dy 1-x Sr x CoO 3-δ (x = 0.67 to 0.95). Poster presented to the 28th Annual Condensed Matter and Materials Meeting, Charles Sturt University, Wagga Wagga, 3-6 February 2004. Retrieved from: https://www.physics.org.au/wp-content/uploads/cmm/2004/04handbook.pdfen_AU
dc.identifier.conferenceenddate6 February 2004en_AU
dc.identifier.conferencename28th Annual Condensed Matter and Materials Meetingen_AU
dc.identifier.conferenceplaceWagga Wagga, New South Walesen_AU
dc.identifier.conferencestartdate3 February 2004en_AU
dc.identifier.issn1037-1214en_AU
dc.identifier.otherWP17en_AU
dc.identifier.urihttps://www.physics.org.au/wp-content/uploads/cmm/2004/04handbook.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11601en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectMagnetic propertiesen_AU
dc.subjectMagnetic fieldsen_AU
dc.subjectTemperature range 0065-0233 Ken_AU
dc.subjectTemperature range 0273-0400 Ken_AU
dc.subjectSpin glass stateen_AU
dc.subjectFerromagnetic materialsen_AU
dc.titleMagnetic properties of Dy 1-x Sr x CoO 3-δ (x = 0.67 to 0.95)en_AU
dc.typeConference Posteren_AU
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