Y. Oner et H. Sari, ROTATIONAL VECTOR MAGNETIZATION MEASUREMENTS ON NI74MN24PT2 ALLOY, Journal of magnetism and magnetic materials, 132(1-3), 1994, pp. 55-61
Rotational vector magnetization measurements were carried out on thin
disk-like samples of Ni74Mn24Pt2 at T = 5, 12 and 25 K, respectively.
The samples were first cooled in a high field to low temperatures and
then longitudinal (M(L)) and transverse (M(T)) components of magnetiza
tion as a function of the sample rotational angle (THETA) were measure
d simultaneously in various fields. We have found that a multi-domain
structure still persists in a field-cooled state. During sample rotati
ons, each domain restabilizes the balancing opposite torques exerted o
n it by the external field H and anisotropy field (H(A)), accompanying
anisotropy field rotations relative to H, elastically at low temperat
ures, but dissipatively at higher temperatures. The experimental resul
ts were analyzed with a simple torque balance equation assuming that t
he anisotropy of the sample has only a purely directional component.