Title :
Anisotropic Magnetoresistance in Vanishing-Magnetostriction Amorphous Microwires With different Geometries
Author :
Merazzo, Karla J. ; Confalonieri, Giovanni A Badini ; Vázquez, Manuel ; Casas, Francisco Batallán
Author_Institution :
CSIC, Inst. de Cienc. de Mater. de Madrid, Madrid, Spain
Abstract :
Amorphous glass-coated microwires of nominal composition (Co0.94Fe0.06)72.5Si12.5B15 were prepared by quenching and drawing method, with 20 ¿m and 40 ¿m metallic and total diameter, respectively. Individual pieces of microwires with four different geometry configurations have been studied: a straight wire and three curved wires with approximately 2-mm curvature. Magnetic measurements were performed in a VSM magnetometer under parallel and perpendicular magnetic field modes, while resistance was evaluated with the four-point technique. The magnetoresistance response for each sample has been correlated with the corresponding magnetization processes. The relative contribution of domain wall motion and magnetization rotation mechanisms involved for each geometry configuration and field mode are concluded to be in the origin of the observed magnetic and magnetotransport properties.
Keywords :
cobalt compounds; ferromagnetic materials; iron compounds; magnetisation reversal; magnetometers; magnetoresistance; magnetostriction; (Co0.94Fe0.06)72.5Si12.5B15; VSM magnetometer; amorphous glass-coated microwires; anisotropic magnetoresistance; curved wires; domain wall motion; geometry configuration; magnetic properties; magnetization rotation mechanisms; magnetotransport properties; size 20 mum; size 40 mum; straight wire; vanishing-magnetostriction amorphous microwires; Amorphous magnetic materials; Amorphous materials; Anisotropic magnetoresistance; Geometry; Iron; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Perpendicular magnetic anisotropy; Wire; Amorphous microwires; magnetization processes; magnetoresistance;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2009.2033555
