Structural and magnetic properties of bulk nanocrystalline Erbium metal

Abstract

Bulk nanocrystalline Erbium metals were prepared via Spark Plasma Sintering (SPS) and subsequent annealing process. The nanocrystalline Er metals have the same hexagonal close packed structure as that of coarse-grained sample. Decrease in grain size results in remarkable changes in the three magnetic ordering temperatures of the nanocrystalline Er metal. At 5 K, the magnetization drops by 10.9%, while the coercivity increases by 4 times for nanocrystalline Er compared with those of coarse-grained sample. These results indicate the remarkable influence of the nanostructure on the magnetism of Er due to finite size effect

Intrinsic magnetic properties of single-phase Mn1+xGa (0 < x < 1) alloys

“…A look at the Mn-Ga phase diagram shows that this is one of the most complex binary phase diagrams. To avoid complexities and the effects of the microstructure on the magnetic properties, as seen in thin films and nanograin samples 10 11 12 , we need to prepare good quality single-phase samples (see Methods ). In the present study, we report on the intrinsic magnetic properties of single-phase Mn 1 + x Ga (0 < x < 1) alloys.…”