Magnetic transitions in LaFe13−x−yCoySix compounds

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dc.contributor.authorWang, JLen_AU
dc.contributor.authorCampbell, SJen_AU
dc.contributor.authorKennedy, SJen_AU
dc.contributor.authorShamba, Pen_AU
dc.contributor.authorZeng, Ren_AU
dc.contributor.authorDou, SXen_AU
dc.contributor.authorWu, GHen_AU
dc.date.accessioned2017-04-25T23:52:11Zen_AU
dc.date.available2017-04-25T23:52:11Zen_AU
dc.date.issued2014-11-26en_AU
dc.date.statistics2016-12-06en_AU
dc.description.abstractThe magnetic properties of a set of LaFe13−x−yCoySix compounds (x = 1.6 − 2.6; y = 0, y = 1.0) have been investigated using magnetic measurements, thermal expansion, 57Fe Mössbauer spectroscopy and high resolution neutron powder diffraction methods over the temperature range 10–300 K. The natures of the magnetic transitions in these LaFe13−x−yCoySix compounds have been determined. The Curie temperatures of LaFe13−xSix were found to increase with Si content from TC = 219(5) K for Si content x = 1.6 to TC = 250(5) K for x = 2.6. Substitution of Co for Fe in LaFe10.4Si2.6 resulted in a further enhancement of the magnetic ordering temperature to TC = 281(5) K for the LaFe9.4CoSi2.6 compound. The nature of the magnetic transition at the Curie temperature changes from first order for LaFe11.4Si1.6 to second order for LaFe10.4Si2.6 and LaFe9.4CoSi2.6. The temperature dependences of the mean magnetic hyperfine field values lead to TC values in good agreement with analyses of the magnetic measurements. The magnetic entropy change, −ΔSM, has been determined from the magnetization curves as functions of temperature and magnetic field (ΔB = 0 − 5 T) by applying the standard Maxwell relation. In the case of LaFe12.4Si1.6 for example, the magnetic entropy change around TC is determined to be -ΔSM ∼ 14.5 J kg−1 K−1 for a magnetic field change Δ B = 0 − 5 T. © 2013, Springer Science+Business Media Dordrecht.en_AU
dc.identifier.citationWang, J. L., Campbell, S. J., Kennedy, S. J., Shamba, P., Zeng, R., Dou, S. X., & Wu, G. H. (2014). Magnetic transitions in LaFe13−x−yCoySix compounds. Hyperfine Interactions, 226(1-3), 405-413. doi:10.1007/s10751-013-0972-9en_AU
dc.identifier.govdoc7670en_AU
dc.identifier.issn1572-9540en_AU
dc.identifier.issue1-3en_AU
dc.identifier.journaltitleHyperfine Interactionsen_AU
dc.identifier.pagination405-413en_AU
dc.identifier.urihttp://dx.doi.org/10.1007/s10751-013-0972-9en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/8619en_AU
dc.identifier.volume226en_AU
dc.language.isoenen_AU
dc.publisherSpringer Linken_AU
dc.subjectMagnetic propertiesen_AU
dc.subjectTemperature measurementen_AU
dc.subjectInorganic compoundsen_AU
dc.subjectThermalizationen_AU
dc.subjectDataen_AU
dc.subjectPhysical propertiesen_AU
dc.titleMagnetic transitions in LaFe13−x−yCoySix compoundsen_AU
dc.typeJournal Articleen_AU
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