Xu Diming, Avdeev Maxim, Battle Peter D, Ryan D H
Inorganic Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QR, UK.
Dalton Trans. 2017 Nov 21;46(45):15778-15788. doi: 10.1039/c7dt03649c.
Polycrystalline samples of LnCoGeO (Ln = Gd, Tb, Dy, Ho or Er) and LnBCoGeO (B = Sc or Lu) have been prepared and characterised by a combination of magnetometry, Gd Mössbauer spectroscopy and, in the case of TbCoGeO and TbScCoGeO, neutron diffraction. The holmium- and erbium-containing compositions remain paramagnetic down to 2 K, those containing dysprosium behave as spin glasses and the terbium and gadolinium-containing compounds show long-range magnetic order with transition temperatures below 4 K in all cases. The data can be rationalized qualitatively in terms of the interplay between magnetic anisotropy and crystal field effects.
