PHENOMENOM OF THE MAGNETIC INSTABILITI IN SOME MAGNETS WITH COLLECTIVIZED ELECTRONS

Zaur GAMİSHİDZE¹

An effective method of studying the properties of zonal magnets is to affect the magnet by the f-d exchange field. The investigation of the impact of an f-d exchange field on the behavior of zonal metamagnetic Y?Co?_2 was the objectives of this work. Gadolinium was used as a magnetizing element to exclude the effect of a crystal field. Therefore, in this work, the magnetic properties of the system Y_(1-t) ?Gd?_t (?Co?_(1-x) ?Al?_x )_2 were studied. The measurement results showed that, as Y is substituted for Gd, the field H_m decreases monotonically. The magnetization of the d-subsystem exceeds that of the f-subsystem (M_d>?tM?_f), then the magnetic moment of the d-subsystem is oriented parallel to the external field, while the moment of the f-subsystem is antiparallel to the latter, here the f-d exchange interaction leads to a decrease in the metamagnetic transition field. The exchange field H_(f-d) helps the external field with magnetization. When M_d

Keywords
Instability, Metamagnetizm, Magnetization, Exchange Interaction, Critical Field ,