Electronic and magnetic properties of dilute transition clusters in noble (or transition) metals

✍ Scribed by J. C. Parlebas

• Publisher: Springer US
• Year: 1975
• Tongue: English
• Weight: 851 KB
• Volume: 19
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00116183

✦ Synopsis

Using a realistic band structure for the host (noble or transition metal), we present a detailed study of the electronic and magnetic properties of transitional impurity clusters without interactions between the clusters. For the calculation of the one-electron properties, the Hartree-Fock environment effects are self-consistently taken into account by Friedel' s rule. The impurity potentials and densities of states are very sensitive to the impurity-impurity interactions inside the clusters. For the calculation of the magnetic properties, the electron-electron interactions are taken into account in the random phase approximation, which allows one to obtain simple expressions for the specific heat and the low-temperature-dependent resistivity. These properties are + expressed in terms of three characteristic temperatures Tf(1) , Tf(2) , and T~2 ) corresponding to three d(fferent modes of spin fluctuations.for the considered model. We present numerical results from the study of the local magnetic susceptibility, which depends on local environments via several combined effects. Our conclusions on "nearly magnetic" copper-based alloys are in good agreement with the experimental data. In particular, our calculations confirm that a magnetic moment appears on a nickel atom when it is surrounded by approximately eight nearest-neighboring Ni atoms.