Title :
Frequency dependence of the magnetoimpedance in nanocrystalline FeCuNbSiB with high transverse stress-induced magnetic anisotropy
Author :
Vazquez, Manuel ; Kurlyandskaya, G.V. ; Garcia-Beneytez, J.M. ; Sinnecker, J.P. ; Barandiarán, J.M. ; Lukshina, V.A. ; Potapov, A.P.
Author_Institution :
Inst. de Ciencia de Mater., CSIC, Madrid, Spain
fDate :
9/1/1999 12:00:00 AM
Abstract :
Stress-annealed nanocrystalline FeCuNbSiB ribbons show correlation between induced magnetic anisotropy and magnetoimpedance. Two types of crystallization process were used in order to induce a transverse magnetic anisotropy: the first one was performed submitting the original amorphous samples to an applied tensile stress of σ=150 MPa. In the second one, samples are nanocrystallised in a first stage and submitted to stress annealing at σ=290 MPa afterwards. The maximum of the magnetoimpedance can be obtained for dc fields larger than the anisotropy field of the sample or close to the irreversibility field. This behavior can be explained based in the simultaneous switching of two different magnetization processes taking place in the samples with high transverse magnetic anisotropy
Keywords :
amorphous magnetic materials; boron alloys; copper alloys; ferromagnetic materials; giant magnetoresistance; induced anisotropy (magnetic); iron alloys; magnetic annealing; magnetic hysteresis; magnetic switching; magnetisation reversal; metallic glasses; nanostructured materials; niobium alloys; silicon alloys; soft magnetic materials; 150 MPa; 290 MPa; DC fields; FeCuNbSiB; applied tensile stress; frequency dependence; induced magnetic anisotropy; irreversibility field; magnetization processes; magnetoimpedance; simultaneous switching; stress-annealed nanocrystalline ribbons; stress-induced magnetic anisotropy; transverse magnetic anisotropy; Amorphous magnetic materials; Amorphous materials; Anisotropic magnetoresistance; Annealing; Crystallization; Frequency dependence; Magnetic anisotropy; Magnetic switching; Perpendicular magnetic anisotropy; Tensile stress;
Journal_Title :
Magnetics, IEEE Transactions on
