Domain wall permeability limit for the giant magnetoimpedance effect

Si 10 B 15 amorphous ribbon strongly depend on the dc magnetic field. The change ratios of magnetoimpedance ÁZðHÞ=Zð0Þ, magnetoresistance ÁRðHÞ=Rð0Þ and magnetoreactance ÁXðHÞ=Xð0Þ intersect at frequencies, where the change ratio of the magnetoimpedance-phase ÁðHÞ=ð0Þ is zero. There are two intersecting points, which occur near the frequencies of peak and valley of ÁZðHÞ=Zð0Þ, respectively. With increasing dc fields, the intersecting frequencies as well as the peakfrequencies of magnetoimpedance shift to higher frequencies. The simulation of magnetoimpedance for magnetic ribbons was done considering the combination influence of skin effect and relaxation permeability spectra. The negative linear magnetoimpedance at low frequencies, the peak-phenomenon of impedance with field at high frequencies, as well as the intersection of the magnetoimpedance, magnetoresistance and magnetoreactance were well simulated.

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“…ð0Þ, the frequency dependence of magnetoimpedance ðZð0Þ À ZðHÞÞ=Zð0Þ is a straight line at high frequencies. 13) When ! ðHÞ > !…”

Section: Resultsmentioning

confidence: 99%

Giant Magnetoimpedance in (Co0.85Fe0.06Nb0.02Ni0.07)75Si10B15 Amorphous Ribbon

Qin

Han

et al. 2004

Mater. Trans.

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“…Different theoretical models were developed recently for the strain parameters for both the general case and FeCoNi electroplated wires. 20,26 In principle, one can use the parameter values of Table II to predict the position of the FMAR line at 56 GHz. How-ever, the linewidth is so large that one cannot neglect the overlap of the FMR and FMAR.…”

Section: ͑4͒mentioning

confidence: 99%

Ferromagnetic resonance in FeCoNi electroplated wires

Garcı́a-Miquel

Bhagat

Lofland

et al. 2003

Journal of Applied Physics

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We have investigated the microwave properties ͑ferromagnetic resonance and ferromagnetic antiresonance͒ of FeCoNi magnetic tubes created by electroplating on CuBe wire. Important parameters such as the g factor, magnetization, anisotropy field and damping parameter were obtained from the measurements. One sample, prepared by a method which entails rf-sputtering deposition of an additional FeNi layer, shows a clear ferromagnetic antiresonance.

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“…(1) derived from the Maxwell equations. The description can be improved by incorporating models for the magnetization process, the dynamical behavior of the magnetization, and some other effects [58][59][60]. The pure theoretical analysis allows gaining insight in the involved phenomena, but fails to accurately describe the experimental results.…”

Section: Numerical Simulations By Finite Element Methodsmentioning

confidence: 99%

Thin-Film Magneto-Impedance Sensors

Garcı́a-Arribas¹,

Férnández²,

Cos³

2017

Magnetic Sensors - Development Trends and Applications

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We review the state-of-the-art of thin films displaying the magneto-impedance (MI) effect, with focus on the aspects that are relevant to the successful design and operation of thin film-based magnetic sensors. After a brief introduction of the MI effect, the materials and geometries that maximize the performance, together with the measurement procedure for their characterization, are exposed. A nonexhaustive survey of applications is included, mostly with the aim of displaying the capabilities of thin film structures in the field of magnetic sensing, and the variety of topics covered by them. A special emphasis is made on some concepts that are not commonly treated in the literature, such as the influence of the measuring circuit on the magneto-impedance ratio, the geometry optimization by means of numerical simulation by finite element methods, or noise measurements on thin films. Additionally, a brief description of the patterning procedure by photolithography is included, since the major advantage of thin film sensors over other types of magneto-impedance materials as ribbons or wires is the possibility of patterning the sensible element in micrometric shapes, and most of all, their easy integration with the interface microelectronic circuitry.

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Domain wall permeability limit for the giant magnetoimpedance effect

Cited by 14 publications

References 16 publications

Giant Magnetoimpedance in (Co<SUB>0.85</SUB>Fe<SUB>0.06</SUB>Nb<SUB>0.02</SUB>Ni<SUB>0.07</SUB>)<SUB>75</SUB>Si<SUB>10</SUB>B<SUB>15</SUB> Amorphous Ribbon

Giant Magnetoimpedance in (Co<SUB>0.85</SUB>Fe<SUB>0.06</SUB>Nb<SUB>0.02</SUB>Ni<SUB>0.07</SUB>)<SUB>75</SUB>Si<SUB>10</SUB>B<SUB>15</SUB> Amorphous Ribbon

Ferromagnetic resonance in FeCoNi electroplated wires

Thin-Film Magneto-Impedance Sensors

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