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Tailoring of Magnetic Properties and Magnetoimpedance Effect in Thin Amorphous Wires

100%
Zhukov A., Talaat A., Ipatov M., Blanco J., Zhukova V.
Acta Physica Polonica A
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2016
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vol. 129
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issue 4
694-697
EN
We have studied the effect of annealing conditions on magnetic properties of amorphous CoFeNi-based glass-coated microwires. We show that annealing can be very effective for manipulation the magnetic properties of amorphous ferromagnetic glass-coated microwires. Low coercivity and high giant magnetoimpedance (GMI) effect have been observed in as-prepared Co-rich microwires. After annealing of Co-rich microwires we can observe transformation of inclined hysteresis loops into rectangular and coexistence of fast magnetization switching and GMI effect in the same sample. We demonstrate that the switching field value of microwires can be tailored by annealing in the range from 4 to 200 A/m.
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Fast Magnetization Switching in Amorphous Microwires

86%
Zhukov A., Ipatov M., Blanco J., Chizhik A., Talaat A., Zhukova V.
Acta Physica Polonica A
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2014
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vol. 126
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issue 1
7-11
EN
We studied the magnetization switching in magnetically bistable amorphous ferromagnetic microwires. We observed quite fast domain wall propagation along the microwires and a correlation between the magnetoelastic anisotropy, distribution of the local nucleation field along the length of microwire and the domain wall dynamics. We observed that both DW velocity and the range of fields, limiting single DW dynamics, can be manipulated by internal or applied stresses and by annealing. We also observed that under certain conditions a controllable domain wall (DW) collision can be realized in different parts of the wire, and that it is possible to manipulate the DW dynamics in a field-driven regime.
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Magnetic Properties and Giant Magnetoimpedance in Amorphous and Nanocrystalline Microwires

59%
Talaat A., Zhukova V., Ipatov M., Blanco J., Churyukanova M., Kaloshkin S., Kostitcyna E., Shuvaeva E., Gonzalez-Legarreta L., Hernando B., Zhukov A.
Acta Physica Polonica A
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2014
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vol. 126
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issue 1
146-147
EN
We studied magnetic properties and GMI effect of Finemet-type FeCuNbSiB microwires. We observed that GMI effect and magnetic softness of microwires produced by the Taylor-Ulitovski technique, can be tailored by either controlling magnetoelastic anisotropy of as-prepared FeCuNbSiB microwires or controlling their structure by heat treatment or changing the fabrication conditions. GMI effect has been observed in as-prepared Fe-rich microwires with nanocrystalline structure.
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