Abstract:
This the~is describes the experimental in\leSlig~tion of magnetocryStalJine anisotropy
and magnetization of Nickel single crystal. TIle first anisotropy constants have been
determined at diflerent temperatures. The anisotropy eons1allls have been delennined
by tOfllue measurements in the (Ino) eJystaJlographic plaue 'as ~ timelion of fields and
temperatures. TIle mearurements are perfOffiJeil using a Torque Maguetometer wilh
~lllomatic electronic compensating system. TIle temperature dependence of magnetic
anisotropy ofNi is fonnd 10 cOlllply with the earlier wurks 011tllis magnetic system. A
rotation of the magnetic vectur is predicted arouud the fcrrom~gnetic Curie
temperature 7,.. As the samplc entered in In the paramagnetic phase, some nonperiodic
signals ne recOlded, tbe cause ofwhieh may he attributcd to (he lncal spin
flnctuations in the unhroken clusters containing fClTomagnetica!ly ordered spins lIear
the onset of paramagnetic phase. I1le magnetization of the sample is measured by a
Vibrating Sample Magnetomeler (V S,M). The valiation of the anisotropy constants
due to ch~nge oftemperatllre is found to he faster than the variation of m~guetization
in NickeL
