CPM Seminar

Group Theory is an extremely useful tool in the determination of magnetic ordering modes, on the basis of neutron powder diffraction data. In this talk I will illustrate the use of Group Theory in determining the magnetic ordering of the Fe sublattice in YFe₆Ge₆ (Space Group Cmcm) and YFe₆Sn₆ (Space Group Immm), using high-resolution powder diffraction from Chalk River (CW) and ISIS (ToF). The RFe₆Ge₆ and RFe₆Sn₆ compounds are unusual in that they show completely independent magnetic behaviour of the rare-earth (R) and iron sublattices and the ordering temperatures of the Fe and R sublattices differ by two orders of magnitude.

Wednesday, January 19th 2000, 15:00 (Note special time)
Ernest Rutherford Physics Building, Board Room (room 104)