Magnetic and Structural Properties of Y6Mn2 3D2 3
The addition of hydrogen (deuterium) to compounds of the type R6Mn2 3 often has a dramatic effect on the magnetic properties of these compounds. For example, it has been reported (1) that Th6Mn2 3 is a Pauli paramagnet whereas Th6Mn2 3H2 3 is ferromagnetic with Tc = 355°K. By contrast, Y6Mn2 3 is ferrimagnetic (2) while Y6Mn2 3D2 3 shows no net spontaneous magnetization, even at 4.2 °K (1). In an attempt to explain the effect of the addition of deuterium, this study is aimed at ascertaining the crystallographic deuterium positions and the magnetic structure for Y6Mn2 3D2 3. Powder neutron diffraction data show no evidence of magnetic ordering at 298°K, but do show evidence of antiferromagnetism at 80°K. A modified Rietveld profile technique along with magnetic susceptibility measurements have been used to confirm this.
KeywordsArgon Deuterium Shoe Deuteride
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