Investigation of time dependent effects in the magnetization processes of Y Sm1−Co3Cu2 alloys

Co-doped Y2O3 optical functional nanoparticles and novel self-assembly squama-like aggregates

“…All XRD peaks could be indexed to the single-phase bodycentered cubic Y 2 O 3 . The result is different from the previous reports that fcc (or hcp) cobalt exists in nanoparticles prepared by arc-discharging cobalt-based alloy [19,[21][22][23]. According to the (6 2 2) diffraction peak, the calculated lattice parameter of the as-prepared Y 2 O 3 nanoparticles is 10.65Å, which is bigger than 10.59Å of the pure Y 2 O 3 phase.…”

Structure and magnetic properties of nanocrystalline SmCo5 and SmCo3Cu2 prepared by using high-pressure torsion method

“…When substituting Cu for Co in SmCo5, for example, SmCo 3 Cu 2 , the saturation magnetization and the anisotropy field decrease with increasing Cu concentration and the magnetization process changes from nucleation to pinning type, with an enhancement of the coercivity. 25 In this work, we have also prepared nanocrystalline SmCo 3 Cu 2 magnetic materials by high pressure torsion (HPT). The effect of HPT on the structure and magnetic properties of SmCo 3 Cu 2 was studied.…”

Studies on magnetic aftereffect of Fe3O4 nano-particles

“…here, t is the elapsed time, M 0 the initial magnetization, t 0 a constant, and S is the magnetic viscosity coefficient which is generally negative in a demagnetizing field [6]. In this form S is dimensionless and will be given as a percent.…”