Modeling of domain structure and anisotropy in glass-covered amorphous wires

Ménard, David; Frankland, D.; Ciureanu, P.; Yelon, A.; Rouabhi, M.; Cochrane, R. W.; Chiriac, H.; Óvári, T.-A.

doi:10.1063/1.367603

Cited by 26 publications

(14 citation statements)

References 7 publications

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“…There is a sharp MI discontinuity in amorphous wire. 7 The asymmetric two peaks of GMI, as shown in Fig. 2͑a͒, are revealed in the specially annealed ribbon; it has two kinds of anisotropy fields, H k and H b .…”

Section: ͓S0003-6951͑00͒04737-9͔mentioning

confidence: 97%

Response to “Comment on ‘Analysis of asymmetric giant magnetoimpedance in field-annealed Co-based amorphous ribbon’ ” [Appl. Phys. Lett. 77, 1727 (2000)]

Kim

Jang

Kim³

et al. 2000

Applied Physics Letters

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In a Comment [D. X. Chen, L. Pascual, and A. Hernando, Appl. Phys. Lett. 77, 1727 (2000)] on our recent letter [C. G. Kim, K. J. Jang, D. Y. Kim, and S. S. Yoon, Appl. Phys. Lett. 75, 2114 (1999); 76, 1345 (2000)] Chen et al. claimed that the unidirectional anisotropy due to bias field is unphysical one for the description of asymmetric giant magnetoimpedance (GMI) profiles. The symmetric two peaks of GMI profiles measured in the normal sample with an uniaxial anisotropy, allow one to take the minimum energy condition which assumes a jump of magnetization under the field from a metastable state to a stable one. However, the divergence in a calculated GMI profile should appear even in case of a uniaxial anisotropy of normal sample where there is no jump. Divergence indicates the asymmetry and hysteresis in GMI profile. The analysis of this calculation in Chen et al.’s Comment is simply a matter of hysteresis in GMI profile for the increasing and decreasing field, even in a normal sample with uniaxial anisotropy. Even though the hysteresis is ignored by taking the minimum energy condition, the asymmetric profiles with the negligible hysteresis are well ascribed by the model with two kinds of anisotropy fields, as proposed in our previous letter [C. G. Kim, K. J. Jang, D. Y. Kim, and S. S. Yoon, Appl. Phys. Lett. 75, 2114 (1999); 76, 1345 (2000)]. In this model the bias field is quite physical, and is based on the observed experimental results in a specially prepared sample.

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Section: ͓S0003-6951͑00͒04737-9͔mentioning

confidence: 97%

Response to “Comment on ‘Analysis of asymmetric giant magnetoimpedance in field-annealed Co-based amorphous ribbon’ ” [Appl. Phys. Lett. 77, 1727 (2000)]

Kim

Jang

Kim³

et al. 2000

Applied Physics Letters

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“…A few works have shown the evidence of the core-shell structure in Co-based microwires [8,9]. Furthermore, the dynamic response at low field suggests that both regions should be coupled in order to resolve discrepancies in the modelling of magneto-impedance (MI) [9] or of FMR [10].…”

Section: Introductionmentioning

confidence: 98%

Cylindrical magnetization model for glass-coated microwires with circular anisotropy: Statics

Torrejón

Thiaville

Adenot-Engelvin

et al. 2011

Journal of Magnetism and Magnetic Materials

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“…12,13 Very recently, GMI effect has been reported in a low positive magnetostrictive Co 83.2 Mn 7.6 Si 5.8 B 3.3 microwire. 8 Though the change in magnetization and transverse permeability in the outer domains of the samples due to the application of a dc magnetic field is considered to be the main reason for GMI, 14 no clear experimental evidence has been reported yet. To verify it, Co 83.2 Mn 7.6 Si 5.8 B 3.3 microwire has been heat treated by passing a dc current of 50 mA through it.…”

Section: Introductionmentioning

confidence: 99%

Giant magnetoimpedance effect in a positive magnetostrictive glass-coated amorphous microwire

Mandal

Mandal²,

Vázquez

et al. 2002

Phys. Rev. B

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The giant magnetoimpedance ͑GMI͒ effect in positive magnetostrictive glass-coated amorphous Co 83.2 Mn 7.6 Si 5.8 B 3.3 microwire has been studied as a function of a dc magnetic field Ϫ140ϽH dc Ͻ140 Oe and frequency 0.1Ͻ f Ͻ12.85 MHz. A maximum change of 43% in the MI of the as-quenched sample has been observed around 5 MHz frequency. Heat treatment of the sample by passing a dc current of 50 mA through it enhances the MI value to a large extent ͑maximum change ϳ94%͒ by increasing the outer domain volume and inducing a transverse anisotropy. On the other hand, application of an external tensile stress reduces the GMI value by increasing the inner core domain and developing an axial anisotropy. In an as-quenched sample, the maximum value of MI is observed at H dc ϳ0 when measured at frequency f Ͻ8 MHz beyond which a two peak MI profile is seen. The heat-treated sample shows this two peak behavior from a much lower frequency ͑below 1 MHz͒ and additional peaks at H dc ϳ0 for f Ͼ10 MHz. Asymmetry in the MI peaks of a microwire has been produced by passing a dc current through the sample during impedance measurement. The magnetization of the as-quenched and heat-treated samples has also been studied to understand the domain structure and magnetoimpedance results.

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Modeling of domain structure and anisotropy in glass-covered amorphous wires

Cited by 26 publications

References 7 publications

Response to “Comment on ‘Analysis of asymmetric giant magnetoimpedance in field-annealed Co-based amorphous ribbon’ ” [Appl. Phys. Lett. 77, 1727 (2000)]

Response to “Comment on ‘Analysis of asymmetric giant magnetoimpedance in field-annealed Co-based amorphous ribbon’ ” [Appl. Phys. Lett. 77, 1727 (2000)]

Cylindrical magnetization model for glass-coated microwires with circular anisotropy: Statics

Giant magnetoimpedance effect in a positive magnetostrictive glass-coated amorphous microwire

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