No abstract

No abstract

No abstract

Dedicated t o Prof. Dr. A. SEEGER on the occasion of his 60t.h birthday The isothermal annealing of the amorphous alloys a t 677 K (above the crystallization peak K, in the DSC plot) leads to the formation of probably more than one metastable phase in the initially amorphous matrix; one of these phases is ferromagnetic a t room temperature. By annealing the amorphous alloys at 600 K (first peak in the DSC (differential-scanning-calorimetry) plot, formerly interpreted as phase separation into two amorphous phases), microcrystallites are formed in the amorphous matrix, which are proved by electron microscopy investigations. These crystallites are not ferromagnetic at room temperature.Eine isotherme Auslagerung der amorphen Legierungen bei 677 K (oberhalb des Kristallisationspeaks K, in dem DSC-Plot) fuhrt wahrscheinlich zur Bildung von mehr als einer metastabilen Phase, von denen eine bei Raumtemperatur ferromagnetisch ist. Bei der Auslagerung der amorphen Legierungen bei 600 K (erstes Maximum der DSC (differential-scanning-calorimetry)-Darstellung), bei der friiher eine Trennung in zwei amorphe Phasen angenommen wurde, bilden sich durch elektronenmikroskopische Untersuchungen nachgewiesene Mikrokristallite in der amorphen Matrix. Diese sind bei Raumtemperatur nicht ferromagnetisch.

The magnetic susceptibility contribution due to non-magnetic atoms, X,,, was deduced from magnetization measurements performed from 300 K to 1400 K for the amorphous and liquid state of Ni-P alloys around 20 at. % P. This susceptibility correlates well for the corresponding amorphous and liquid alloys and its change with composition indicates a decrease of the density of states at the Fermi level with increasing P-content.