论文信息 - Determination of the intrinsic high-frequency magnetoimpedance spectra of multilayer systems

Determination of the intrinsic high-frequency magnetoimpedance spectra of multilayer systems

Magnetoimpedance results up to 3 GHz are presented in a Ni–Fe∕Au∕Ni–Fe multilayer film. The impedance of the sample is measured using microwave techniques in a microstrip-based test fixture. We describe in detail the procedure to obtain the intrinsic impedance of the sample free from contributions of the measurement setup. The process follows a method proposed for cylindrical samples in coaxial lines, but the procedure is here adapted to planar geometry. The impedance spectra so obtained clearly reveal the existence of ferromagnetic resonance, which is acceptably reproduced by simple theoretical models.

[1] David Ménard,et al. Giant magnetoimpedance in a cylindrical magnetic conductor , 1998 .

[2] D. Pozar. Microwave Engineering , 1990 .

[3] Alfredo García-Arribas,et al. Analysis of magnetoimpedance measurements at high frequency using a microstrip transmission line , 2004 .

[4] L. Kraus. Theory of giant magneto-impedance in the planar conductor with uniaxial magnetic anisotropy , 1999 .

[5] C. Kittel. Introduction to solid state physics , 1954 .

[6] David Ménard,et al. Theory of longitudinal magnetoimpedance in wires , 2000 .

[7] David Ménard,et al. Calculations of giant magnetoimpedance and of ferromagnetic resonance response are rigorously equivalent , 1996 .

[8] L. V. Panina,et al. Giant magneto‐impedance and magneto‐inductive effects in amorphous alloys (invited) , 1994 .

[9] R. Beach,et al. Sensitive field‐ and frequency‐dependent impedance spectra of amorphous FeCoSiB wire and ribbon (invited) , 1994 .

[10] P. Ciureanu,et al. High frequency impedance spectra of soft amorphous fibers , 1997 .

[11] Tsuyoshi Uchiyama,et al. Giant magneto-impedance in Co-rich amorphous wires and films , 1995 .