Crystal structure and magnetic properties of TbFe0.4Ge2 compound

Enhanced electrical resistance at the field-induced magnetic transitions in some non-stoichiometric and stoichiometic Tb-based ternary germanides

“…A bifurcation of these curves takes place below 17 K (a feature occasionally reported for some antiferromagnetic ordered systems arising from anisotropy and grain boundary effects) with the FC curve continuously rising with the decreasing temperature. These features provide definitive evidence for the presence of magnetic ordering in compound, in contrast to that reported in Ref [10]. Above the ordering temperature, Curie-Weiss law is obeyed with the θ p ~ -38 K and µ eff ~ 9.9µ B (nearly equal to that of free Tb 3+ ion).…”

“…It is seen that the compound, TbIrGe 2 , with two magnetic transitions at low temperatures, is characterized by a huge positive MR (about 50%) at the magnetic field at which there are magnetization jumps. A clear evidence of magnetic ordering is observed in TbFe 0.4 Ge 2 , unlike in Ref [10]. However, a weak negative MR (<1%) is observed in this compound for an initial application of magnetic field, with MR decreasing at lower fields and then increasing at higher fields.…”

“…Neutron diffraction measurements carried out on TbNi 0.4 Ge 2 and TbCu 0.4 Ge 2 showed that the rare earth orders antiferromagnetically below T N = 16 and 39 K respectively [9]. Some investigations were also carried out on polycrystalline TbFe 0.4 Ge 2 [10]. For the stoichiometric structure, magnetic properties of the ternary compounds RPtGe 2 and RIrGe 2 (R=Gd-Er) have been reported [7,11].…”

Magnetic Properties of TbFe0.25Ge2, TbSn0.4Ge1.4and NdSn0.6Ge1.775Compounds

“…In isostructural TbFe 0.4 Ge 2 compound, the long-range order is not observed up to 1.57 K [6] while in HoFe 0.33 Ge 2 [7] and ErFe 0.3 Ge 2 [8] the antiferromagnetic ordering at low temperatures was detected.…”

Enhanced electrical resistance at the field-induced magnetic transitions in some non-stoichiometric and stoichiometric Tb-based ternary germanides

“…It is seen that the compound TbIrGe 2 , with two magnetic transitions at low temperatures, is characterized by a huge positive MR (about 50%) at the magnetic field at which there are magnetization jumps. Clear evidence of magnetic ordering in TbFe 0.4 Ge 2 is observed, unlike in [10]. However, a weak negative MR (<1%) is observed in this compound for an initial application of a magnetic field, with MR decreasing at lower fields and then increasing at higher fields.…”