Implementation of an automated FORC analysis and anisotropy measurements in a homemade VSM

P. N. GRANELL; M. R. PAGNOLA; L. G. PAMPILLO; F.D. SACCONE

REVISTA MEXICANA DE FíSICA

SOC MEXICANA FISICA

Lugar: México; Año: 2012 vol. S 58 p. 276 - 279

0035-001X

In this paper we describe the implementation of a biaxial vibrating sample magnetometer capable of performing measurements by the First Order Reversal Curve technique in an automated way. This magnetometer was employed for measuring the coefficient of anisotropy in an ALNICO piece. The measured value was K1= (3.9±0.3) x 105J/m3. The interaction fields of this ALNICO sample have been analysed after performing its First Order Reversal Curves diagrams, in parallel and perpendicular to the field anisotropy orientation. For this last orientation, it was detected a  low contribution of hysterons to the diagram in the near range of H=0 axis, as it can be expected due to a reduction in  the remanence of perpendicular measurements of hysteresis loop. (http://rmf.fciencias.unam.mx/~rmf/galeras/aldoromero/rmf-s_58(2).pdf)