A new giant magneto-impedance head using magnetic microstrip lines

Jiang, Nianhua; Yamakawa, K.; Honda, N.; Ouchi, Kazuhiro

doi:10.1109/20.706541

Cited by 9 publications

(2 citation statements)

References 6 publications

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“…The giant magnetoimpedance (GMI) effect is a large reduction in electrical impedance in soft ferromagnetic conductors as a function of an applied dc magnetic field [1,2]. The GMI effect has been extensively studied in amorphous ferromagnetic wires such as FeCoSiB owing to its application in highly sensitive magnetic sensors [3][4][5][6][7][8]. The impedance of these wires can be written as…”

Section: Introductionmentioning

confidence: 99%

Giant magnetoimpedance of electrodeposited Co/Cu/Co on Ag wires

Sirisathitkul¹,

Jantaratana²

2007

J. Phys. D: Appl. Phys.

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Giant magnetoimpedance (GMI) was studied in electrodeposited Co/Cu/Co-coated Ag wires with variations in the axial dc magnetic field (0–2 kOe), frequency of ac driving current (1 kHz–100 MHz), thickness of each layer (1.0–25.0 µm) and diameter of the Ag core (47.7 and 120.0 µm). With increasing thickness of coated layers and Ag cores, the maximum GMI ratio increased but the characteristic frequency decreased. Unlike Co-coated Ag wires, the frequency-dependent GMI curves of these multilayered wires were broadened and asymmetric. The GMI behaviours were explained in terms of the distribution of current density and current flow in the coated wires obtained from the finite element method simulation program.

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Section: Introductionmentioning

confidence: 99%

Giant magnetoimpedance of electrodeposited Co/Cu/Co on Ag wires

Sirisathitkul¹,

Jantaratana²

2007

J. Phys. D: Appl. Phys.

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“…For bulk magnetic materials, such as ferrite cores, coaxial transmission lines have been used for a long time [4,5]. For thin-film magnetic materials, microstrip transmission lines have been used since this geometry is compatible with thinfilm deposition and pattern definition and it allows access to the film surface for optical interrogation [6][7][8][9]. Perhaps the most exciting application of microstrip lines has been to provide ultra-fast field pulses to study the temporal [10] and spatiotemporal magnetization reversal dynamics of NiFe thinfilm structures [11].…”

Section: Introductionmentioning

confidence: 99%

Nanosecond pulsed field magnetization reversal in thin-film NiFe studied by Kerr effect magnetometry

Atkinson¹,

Allwood²,

Cooke³

et al. 2001

J. Phys. D: Appl. Phys.

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Magnetization reversal has been studied in a 5 nm thick Ni80Fe20 film under the action of a pulsed magnetic field, for pulse durations between 2-102 ns. Fast pulses were applied to the sample from a thin-film microstrip transmission line and magnetization changes were measured using a continuous wave laser magneto-optic Kerr effect magnetometer. The switching field was found to increase as the pulse duration decreased, in qualitative agreement with simple models. More unusually, the switching field was also found to increase as a function of a quasi-static bias field in excess of the value of that bias. This effect is stronger for the shorter pulses. Evidence is presented which suggests that this is due to rapid relaxation of the magnetization after the termination of the pulsed field.

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