Large Barkhausen and Matteucci effects in FeCoSiB, FeCrSiB, and FeNiSiB amorphous wires

Mohri, K.; Humphrey, F. B.; Kawashima, Koichiro; Kimura, Keisuke; Mizutani, Minoru

doi:10.1109/20.104526

Cited by 239 publications

(137 citation statements)

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“…It is remarkable to note that the study of the magnetic properties of amorphous wires is a topic of great interest because of their outstanding properties, such as single and large Barkhausen jump or giant magneto-impedance effect [4,5]. It is known that the domain structure of the amorphous wire consists of an axially magnetized inner core and the outer shell, in which "maze" or "bamboo" structure can be observed [6]. Taking into account that the giant magneto-impedance effect is mainly a "surface" effect, the investigation of magnetic structure in the outer shell becomes a special meaning.…”

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confidence: 99%

“…These peaks can be associated with a quick rotation of the magnetization from the circular to the axial direction (increase of absolute value of the axial magnetization) and a quick nucleation of new circular domains (the reverse jump of the signal). Therefore, it is reasonable to conclude (see [6]) that the surface domain structure of as-cast wire consists of circular domain and the remagnetization process is related with the formation of reversal circular domains. The longitudinal Kerr effect loop under applied axial field consists of two jumps (Fig.…”

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confidence: 99%

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Kerr Effect as Method of Investigation of Magnetization Reversal in Amorphous Wires

Chizhik¹,

Zhukov

Blanco³

et al. 2002

phys. stat. sol. (a)

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Magneto-optical Kerr effect has been employed for the investigation of the magnetization reversal process in Co-rich amorphous wires. The Kerr effect experiments have been performed in a new configuration with circular magnetic field produced by an electric current flowing through the studied wire. Changes of the Kerr effect hysteresis loops after annealing have been found to be related with the magnetic domain structure modification. This modification is attributed to the change of sign of magnetostriction constant.Optical effects, which demonstrate the influence of magnetization on the state of light are known as magneto-optical effects. Two main magneto-optical phenomena are usually distinguished, the Faraday effect and the Kerr effect. The Faraday effect is characterized by the rotation of the polarization plane and the change of the ellipticity when linearly polarized light passes through the magnetized medium. The Kerr effect [1] consists of the rotation of the plane of polarization and the change of the intensity of polarized light reflected from a surface of the magnetized matter. There are three magneto-optical Kerr effects depending on the mutual arrangement of the magnetization and the plane of incidence of the scattered light -polar, longitudinal and transverse. Experimental investigations have shown that the rotation of the polarization or the change of light intensity (depending on the magneto-optical effect configuration) is proportional to the projection of magnetization on one of the three orthogonal axes [2,3]. Based on this relation Kerr effects have been used to get the images of magnetic domains or to obtain magnetization loops.Usually the Kerr effect has been applied to study samples with plane surface. Recently, we have used the Kerr effect to investigate wire-shaped specimens. It is remarkable to note that the study of the magnetic properties of amorphous wires is a topic of great interest because of their outstanding properties, such as single and large Barkhausen jump or giant magneto-impedance effect [4,5]. It is known that the domain structure of the amorphous wire consists of an axially magnetized inner core and the outer shell, in which "maze" or "bamboo" structure can be observed [6]. Taking into account that the giant magneto-impedance effect is mainly a "surface" effect, the investigation of magnetic structure in the outer shell becomes a special meaning. So far, the Kerr

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confidence: 99%

mentioning

confidence: 99%

Kerr Effect as Method of Investigation of Magnetization Reversal in Amorphous Wires

Chizhik¹,

Zhukov

Blanco³

et al. 2002

phys. stat. sol. (a)

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“…All dependences are characterized by the similar forms of both components (real as well as imaginary one). The susceptibility is zero up to the switching field H sw , where it abruptly increases as a result of the depining of the closure domain wall, according to the expected behavior in wires with positive magnetostriction [6]. Above the H sw , the imaginary parts immediately decrease in the hyperbolic dependence, whereas in the real part small concave decrease shows the reversible moment rotation in the external domain structure with the radial magnetization [5].…”

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confidence: 87%

Susceptibility Spectroscopy in FeNiSiB Microwires

Olivera

Gamcová²,

Varga³

et al. 2008

Acta Phys. Pol. A

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“…The existence of the axially oriented core domain along the wire explains the magnetic bistability, consisting of the sudden reorientation of this inner domain [30]. Wires exhibiting vanishing magnetostriction coefficient do not show spontaneous magnetic bistability.…”

Section: Resultsmentioning

confidence: 98%

Magnetoimpedance in soft magnetic amorphous and nanostructured wires

et al. 2011

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The surface impedance tensor approach has been used to review the impedance response in a variety of amorphous and nanocrystallized wires. An experimental study on the torsion annealing effect on the magnetoimpedance (MI) behaviour for positive and negative magnetostriction amorphous wires of FeSiB and CoSiB compositions, respectively, has been carried out. Moreover, the influence of the onset nanocrystallization on the MI behaviour in Finemet-type alloys, with particular attention focussed on the case that the wires are annealed under applied torsional stress, is also presented. The analysis of the MI and torsion-impedance (TI) effects allows us to compare the different magnetic characteristics observed in a variety of wires. Special attention is paid to new results of the off-diagonal MI huge responses of these ferromagnetic samples, which are also a very useful source of information on the magnetic properties of the wires.

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Large Barkhausen and Matteucci effects in FeCoSiB, FeCrSiB, and FeNiSiB amorphous wires

Cited by 239 publications

References 4 publications

Kerr Effect as Method of Investigation of Magnetization Reversal in Amorphous Wires

Kerr Effect as Method of Investigation of Magnetization Reversal in Amorphous Wires

Susceptibility Spectroscopy in FeNiSiB Microwires

Magnetoimpedance in soft magnetic amorphous and nanostructured wires

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