Rare earth based bulk metallic glasses

Magnetocaloric effect in rare earth-based bulk metallic glasses

“…The large elastic moduli, suggest the strong chemical interaction among the components and robust resistance to local structural change under crystallization, which further confirms the high thermal stability and excellent mechanical properties in this kind of materials compared with their glass ribbons. The BMGs exhibit large resistivity and negative temperature coefficient of resistivity over the whole temperature range associated with the amorphous structure [41,42]. The large electrical resistivity results in smaller eddy current heating compared with corresponding crystalline materials.…”

“…The phase transition temperatures (T c ), determined at the temperature where the dM/dT displays the minimum, are 79 K and 91 K for the as-cast Gd 55 Ni 25 Al 20 and Gd 51 Al 24 Co 20 Zr 4 Nb 1 , respectively [41]. For the as-cast amorphous alloy the magnetization varies sharply at the ordering temperature even though the strong disorder effect exists in the sample suggesting the homogeneous structure and large |dM/dT| at the Curie temperature.…”

Magnetic small-angle neutron scattering on bulk metallic glasses: A feasibility study for imaging displacement fields

“…Bulk metallic glasses (BMGs) are amorphous solids that are well known for their excellent mechanical properties, which render them attractive for many technological applications [1][2][3][4]. Although these materials are heavily investigated both experimentally and theoretically, the yielding and failure of BMGs under external strain are still not fully understood.…”

Large magnetic entropy and electron-phonon coupling in Gd-based metallic glass

“…1 Since the rare earth Nd-based BMGs were found in 1996, a series of Ce-, Pr-, Sm-, Gd-, Tb-, Dy-, Ho-, Er-, Yb-, and Tm-based rare earth BMGs have been developed. 1 In the rare earth based BMGs, the rare earth elements have the magnetic 4f electrons, which shows plentiful physical properties, for example, magnetic properties, 2 elastic behavior, 3 and heavy fermion behavior, etc. 4 The rare earth based BMGs with disordered structure exhibit a high effective moment and excellent magnetocaloric effect in magnetic field.…”

“…The properties of metallic glasses can be also modulated by annealing and the composition. 1,7 These features drew the attention of researchers searching for systems with promising magnetocaloric properties.…”