Rapidly quenched FexTa100−xalloys

Rapidly Quenched Kosterlitz-Thouless Superfluid Transitions

Rapidly quenched Kosterlitz-Thouless (KT) superfluid transitions are studied by solving the Fokker-Planck equation for the vortex-pair dynamics in conjunction with the KT recursion relations. Power-law decays of the vortex density at long times are found, and the results are in agreement with a scaling proposal made by Minnhagen and co-workers for the dynamical critical exponent. The superfluid...

Magnetism of Rapidly Quenched Sm1-xZrxCo5 Nanocrystalline Materials

Magnetic and Structural Properties of Rapidly Quenched Tetragonal Mn Ga Nanostructures

Nanostructured Mn Ga ribbons with and 1.1 were prepared using arc-melting, melt-spinning and annealing. As-spun samples crystallized into hexagonal and cubic Heusler crystal structures based on the concentration of Mn in Mn Ga. Upon vacuum-annealing the samples at 450 C for about 50 hours, both the hexagonal and cubic structures transformed into a tetragonal structure. High-temperature x-ray di...

Effect of Sm content on energy product of rapidly quenched and oriented SmCo5 ribbons

The Sm-content dependence of phase composition, anisotropy, and other magnetic properties of Sm1+δCo5 (δ ≤ 0.12) ribbons melt spun at 10 m/s has been studied. The samples consist of hexagonal SmCo5 grains whose c axes are preferentially aligned along the long direction of the ribbon. The lattice parameter a and the cell volume (V) increase with increasing Sm content δ, whereas c decreases. Sm a...

Magnetic and Structural Properties of Rapidly Quenched Tetragonal Mn3-x Ga Nanostructures

Ga samples could not be determined because of the structural phase transition, the Curie temperature decreased with increasing x in Mn Ga. The maximum magnetization of 57 emu/g (300 emu/cm) and the coercivity of 6.5 kOe were measured in the Mn Ga and Mn Ga ribbons, respectively.