Magnetic structures of Pr0.8Lu0.2Mn2Ge2 and Pr0.6Lu0.4Mn2Ge2

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dc.contributor.authorWang, JLen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorCampbell, SJen_AU
dc.contributor.authorKennedy, SJen_AU
dc.contributor.authorZeng, Ren_AU
dc.contributor.authorDou, SXen_AU
dc.contributor.authorWu, GHen_AU
dc.date.accessioned2012-02-22T04:52:05Zen_AU
dc.date.available2012-02-22T04:52:05Zen_AU
dc.date.issued2011-10-01en_AU
dc.date.statistics2012-02-22en_AU
dc.description.abstractThe magnetic structures of Pr0.8Lu0.2Mn2Ge2 and Pr0.6Lu0.4Mn2Ge2 have been determined by neutron powder diffraction over the temperature range 10-450 K. On cooling from the paramagnetic region the Mn sublattice of Pr0.8Lu0.2Mn2Ge2 orders in a similar manner to PrMn2Ge2 with first ab-plane intralayer antiferromagnetism (AFl) below TNintra ~ 397 K followed by canted ferromagnetism (Fmc) at TCinter ~ 330 K and then a conical (Fmi) spin structure below Tc/c ~ 192 K. The transition at TCPr=35 K with related enhancement in magnetization, is assigned to the additional ferromagnetic contribution of the Pr sublattice leading to the combined (Fmc+F(Pr)). For Pr0.6Lu0.4Mn2Ge2 the transition from PM to AFl occurs at TNintra ~ 375 K while the canted ferromagnetic (Fmc) state forms at TCinter ~ 321 K . The increased Lu concentration of Pr0.6Lu0.4Mn2Ge2 destroys the incommensurate Fmi conical spin structure of Pr0.8Lu0.2Mn2Ge2. Rather, in common with similar mixed RT2X2 systems (e.g., La1-xYxMn2Si2, La1-xPrxMn2Si2), the Pr0.6Lu0.4Mn2Ge2 compound exhibits co-existence of the AFmc and Fmc phases on cooling from the pure Fmc state. Transformation to the combined ferromagnetic state (Fmc+F(Pr)) takes place on c-axis ordering of the Pr sublattice at TCPr ~ 31 K . In the region of phase co-existence, the Fmc unit cell is larger than the AFmc unit cell indicating strong magneto-structural coupling with a chan- - ge of the lattice inducing a change of the magnetic state. © 2011, Institute of Electrical and Electronics Engineers (IEEE)en_AU
dc.identifier.citationWang, J. L., Studer, A. J., Campbell, S. J., Kennedy, S. J., Zeng, R., Dou, S. X., Wu, G. H. (2011). Magnetic structures of Pr0.8Lu0.2Mn2Ge2 and Pr0.6Lu0.4Mn2Ge2. IEEE Transactions on Magnetics, 47(10), 2893-2896. doi:10.1109/TMAG.2011.2151180en_AU
dc.identifier.govdoc3826en_AU
dc.identifier.issn0018-9464en_AU
dc.identifier.issue10en_AU
dc.identifier.journaltitleIEEE Transactions on Magneticsen_AU
dc.identifier.pagination2893-2896en_AU
dc.identifier.urihttp://dx.doi.org/10.1109/TMAG.2011.2151180en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4064en_AU
dc.identifier.volume47en_AU
dc.language.isoenen_AU
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en_AU
dc.subjectNeutron diffractionen_AU
dc.subjectCrystal latticesen_AU
dc.subjectFerromagnetic materialsen_AU
dc.subjectMagnetismen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectMagnetizationen_AU
dc.titleMagnetic structures of Pr0.8Lu0.2Mn2Ge2 and Pr0.6Lu0.4Mn2Ge2en_AU
dc.typeJournal Articleen_AU
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