Magnetic properties oflntermetalic uranium compounds

Abstract EN

Magnetization density, neutron diffraction and a spin polarized have been made on uranium compounds, Upt3, UBet3, The compounds containing Pt, crystallizes in the hexagonal N13S„ structure the space group P6■(-@3)c/mmc.

The Heavy Fermion Compound UBel3 crystallizes in the cubic NaZnI3 structure with the space group Fm ■(-@3)c.

In addition to the investigation of the nuclear structures of two compounds the influence of the magnetic degrees of freedom on the physical properties has been investigated.

For Upt3 the conduction electron play an important role.

It is to be expected that band structure effects significantly determine the properties of Upt3 at low temperature.

In contrast for UBel3 the conduction electron density of states is found to be significantly smaller that in Upt3.

As the density of states at the Fermi level is predominately of 5f electron character in UBel3, this Heavy Fermions system is easier to model magnetically compared to Upt3.