title: A neutron polarization analysis study of moment correlations in (Dy(0.4)Y(0.6))T(2) (T = Mn, Al).
abstract: We present a study of the magnetic moment correlations of two pseudo-binary C15 Laves phase compounds, (Dy(0.4)Y(0.6))Mn(2) and (Dy(0.4)Y(0.6))Al(2), both of which have spin-glass-like magnetic ground states at low temperature. We use neutron powder diffraction with polarization analysis to isolate the diffuse scattering associated with the correlated spin-glass ground state, and compare and contrast the two systems. Despite there being differences of correlation length scale, we discover that the moment-moment correlations of these two disordered magnets are quite similar over a short range, and hence conjecture that the Mn ions in (Dy(0.4)Y(0.6))Mn(2) have little influence on the ground-state magnetic properties.
authors.affiliation: ISIS, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, UK. ross.stewart@stfc.ac.uk
authors.forename: J R
authors.initials: JR
authors.lastname: Stewart
authors.forename: J M
authors.initials: JM
authors.lastname: Hillier
authors.forename: P
authors.initials: P
authors.lastname: Manuel
authors.forename: R
authors.initials: R
authors.lastname: Cywinski