Magnetic spectra of Fe-based nanocrystalline wires with axial or transverse domains

• Published in: Journal of magnetism and magnetic materials Vol. 322; no. 19; pp. 2893 - 2896
• Main Authors: Li, Y.F., Feng, S.Q.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2010; Elsevier
• Subjects: AC circular permeability; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Fe-based nanocrystalline wire; Iron; Magnetic permeability; Magnetic properties and materials; Magnetic properties of nanostructures; Magnetic spectrum; Magnetic wire; Magnetism; Magnetization; Nanocrystals; Physics; Spectra; Wire; AC circular permeability; Fe-based nanocrystalline wire; Magnetic spectrum; Frequency dependence; Magnetization; Domain walls; Magnetic nanomaterial; Wire; Soft magnetic materials; Domain structure; Magnetic permeability; Magnetic domains; Nanocrystal; Iron base alloys; Transition element alloys
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2010.04.047

The circular permeability μ′= μ′− jμ″ of two Fe-based soft magnetic wires with axial and transverse domains, has been determined from the measurements of impedance Z= R+ jX as functions of frequency ( f=10–10 5 Hz) and AC current amplitude ( I=0.1–100 mA). From the magnetic spectra of μ′− f and μ″− f for a few circular fields ( H φ =0.4, 1.2, 4, 12, 40 A/m), we found that the sample with axial domain structure exhibits a relaxational feature, while for the one with transverse domain resonance-like spectra were observed when the circular field H φ ≥4 A/m. These results have been discussed in terms of domain structure and circular magnetization processes.