Resumo

MATA-ZAMORA, M. E.; VALERA-OROZCO, B.  e  MONTIEL, H.. Determinación de la permeabilidad inicial en ferritas suaves con el método modificado del anillo de Rowland. Superf. vacío [online]. 2012, vol.25, n.2, pp.122-127. ISSN 1665-3521.

A methodology is presented, to measure the initial permeability of soft ferrites (Ni-Zn and Mn-Zn); based in the Rowland-ring method. Plots of the excitation voltages versus the induction voltages of a closed magnetic circuit are obtained by employing a software developed in our work group. The method allows to calculate the value of the initial permeability using the slope in the lineal zone of these curves. The importance of establishing the experimental conditions for the determination of μi is fundamental to restrict the answer in frequency and temperature of the studied materials.

Palavras-chave : Soft ferrites; Magnetic properties; Initial permeability; Magnetic circuit.