The Magnetic and Crystal Structure of MnGa (1.15 ≤ x ≤ 1.8) Alloys.

Neutron powder diffraction patterns measured above T have been used to determine the location of the excess Mn in MnGa (1.15 ≤ x ≤ 1.8).

Intrinsic magnetic properties of single-phase Mn(1+x)Ga (0

Magnetization measurements have been carried out on a series of carefully prepared single-phase Mn(1+x)Ga (0 View Article and Find Full Text PDF

First-principles calculation on the Curie temperature of Gd(3)NiSi(2).

The electronic structure and magnetic properties for Gd(3)NiSi(2) have been studied theoretically from a first-principles density functional calculation. The energy band structure is calculated in a local spin density approximation (LSDA), and in a LSDA+Hubbard U approach (LSDA+U), respectively. For Gd atoms, in the LSDA+U approximation, seven spin-up 4f bands are fully occupied and situated at the bottom of Si s states, while the spin-down 4f hole levels are completely unoccupied and well above the Fermi level.

Strengthening of reentrant pinning by collective interactions in the peak effect.

Since it was first observed about 40 years ago [A. B. Pippard, Proc.

Peak Effect and the Phase Diagram of Moving Vortices in FexNi1-xZr2 Superconducting Glasses.

In the mixed state of type II superconductors, vortices penetrate the sample and form a correlated system due to the screening of supercurrents around them. Interestingly, we can study this correlated system as a function of density and driving force. The density, for instance, is controlled by the magnetic field B, whereas a current density j acts as a driving force F=j x B on all vortices.

Field and temperature induced magnetic transition in Gd5Sn4: a giant magnetocaloric material.

Gd5Sn4 exhibits a giant magnetocaloric effect comparable to that reported in the Gd5(Si,Ge)(4) system. The giant magnetocaloric effect is associated with a first-order change that occurs at approximately 82 K in zero field, and can be reversed by the application of an external field of a few Tesla. 119Sn Mössbauer spectroscopy shows that this material is magnetically inhomogeneous over a wide range of temperatures and fields.