Title :
Temperature dependence of magnetic properties in Fe-Co and Fe-Cr base nanocrystalline alloys
Author :
Gómez-Polo, C. ; Pérez-Landazabal, J.I. ; Recarte, V.
Author_Institution :
Dept. Fisica, Univ. Publica de Navarra, Pamplona, Spain
Abstract :
The temperature dependence of the magnetic properties (i.e., ac magnetic permeability and magnetoimpedance voltage) is analyzed for Fe-Co and Fe-Cr base nanocrystalline materials. Around the Curie point of the residual amorphous matrix a magnetic transition is detected, associated with the magnetic decoupling of ferromagnetic crystallites. The magnetic nature of such magnetic transition is analyzed within the framework of the random anisotropy model, taking into account the basic structural and magnetic characteristics of the constituent magnetic phases.
Keywords :
Curie temperature; boron alloys; chromium alloys; cobalt alloys; copper alloys; crystallisation; differential scanning calorimetry; exchange interactions (electron); ferromagnetic materials; iron alloys; magnetic anisotropy; magnetic permeability; magnetoresistance; nanostructured materials; neutron diffraction; niobium alloys; silicon alloys; soft magnetic materials; 300 to 973 K; Curie point; Fe-Co base nanocrystalline alloys; Fe-Cr base nanocrystalline alloys; Fe73.5-xCoxSi13.5B9Cu1Nb3; Fe73.5-xCrxSi13.5B9Cu1Nb3; ac magnetic permeability; crystallization temperature; exchange coupling; ferromagnetic crystallite decoupling; magnetic properties; magnetic transition; magnetoimpedance voltage; random anisotropy model; residual amorphous matrix; room temperature neutron diffraction; soft magnetic properties; temperature dependence; Amorphous magnetic materials; Magnetic analysis; Magnetic anisotropy; Magnetic materials; Magnetic properties; Nanostructured materials; Permeability; Perpendicular magnetic anisotropy; Temperature dependence; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.815877
