Magnetic structure of CeScSi-type TbxEr1−xTi0.85Mo0.15Ge compounds (x = 0, …, 1)

Magnetization and neutron diffraction studies have been carried out on CeScSi-type TbxEr1−xTi0.85Mo0.15Ge compounds (space group I4/mmm, no. 139). These compounds demonstrate ferromagnetic collinear 1 (FC1), ferromagnetic collinear 2 (FC2) and ferromagnetic non-collinear 1 (FNC1) types of ordering. Below TFC1 = 131 K for Tb0.25Er0.75Ti0.85Mo0.15Ge and TFC1 = 194 K for Tb0.5Er0.5Ti0.85Mo0.15Ge the magnetic structure of these compounds consists of ferromagnetic (0 0 2) rare earth double layers with magnetic moments of rare earth atoms the [0, 0, Mz]. Below TFC2 = 242 K for Tb0.75Er0.25Ti0.85Mo0.15Ge and TFC2 = 280 K for TbTi0.85Mo0.15Ge the magnetic structure of these compounds consists of ferromagnetic (0 0 1) layers with magnetic moments of rare earth atoms the [Mx, 0, Mz]. Below TFNC1 = 63 K for ErTi0.85Mo0.15Ge, TFNC1 = 14 K for Tb0.5Er0.5Ti0.85Mo0.15Ge, TFNC1 = 29 K for Tb0.25Er0.75Ti0.85Mo0.15Ge and TFNC1 = 75 K for TbTi0.85Mo0.15Ge the magnetic structure of these compounds consists of ferromagnetic (0 0 2) layers, but the magnetic moments of R atoms in the neighbouring layers are non-collinear.