Engineering of magnetic properties and GMI effect in Co-rich amorphous microwires

Zhukov, А.; Talaat, A.; Churyukanova, M.; Kaloshkin, S.D.; Semenkova, V.; Ipatov, M.; Blanco, J.M.; Zhukova, V.

doi:10.1016/j.jallcom.2015.12.224

Cited by 40 publications

(33 citation statements)

References 36 publications

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“…(i) in-rotating-water quenched ones, usually referred to as "conventional" amorphous wires [6][7][8][9], and (ii) glass-coated ones, referred to as glass-coated or glass-covered amorphous microwires [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Nanocrystalline Magnetic Wires

et al. 2017

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Abstract:The magnetic characteristics of FINEMET type glass-coated nanowires and submicron wires are investigated by taking into account the structural evolution induced by specific annealing all the way from a fully amorphous state to a nanocrystalline structure. The differences between the magnetic properties of these ultrathin wires and those of the thicker glass-coated microwires and "conventional" wires with similar structures have been emphasized and explained phenomenologically. The domain wall propagation in these novel nanowires and submicron wires, featuring a combination between an amorphous and a crystalline structure, has also been studied, given the recent interest in the preparation and investigation of new materials suitable for the development of domain wall logic applications.

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Section: Introductionmentioning

confidence: 99%

Ultrathin Nanocrystalline Magnetic Wires

et al. 2017

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“…The asymmetrical characteristic of GMI curve is elongated and AGMI effect gradually increases. The GMI effect comes from the change of circular permeability with external magnetic field, so it is closely related to the magnetization process 12,13 . There is a "coreshell" magnetic domain structure for these kind of the Cobased micro fibers 4 .…”

Section: Resultsmentioning

confidence: 99%

Giant Magneto Impedance Effect of Co-Based Metallic Fiber Under Bias Magnetic Field

2019

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The giant magneto impedance, GMI, effect of Co-based metallic fibers prepared by melt-extracted technology is investigated under different bias direct electrical current I b. The GMI curves have single peaks which are symmetric about zero field at and below 1MHz. However, the bimodal GMI curves which have asymmetric peaks are observed when I b is over 2mA at 0.1MHz. And asymmetric GMI, AGMI, effect is also appeared at 1MHz when I b just is 1mA and the field sensitivity of GMI effect is increased 5.6 times. The GMI effect and magnetization process is affected by the bias magnetic field profoundly induced by I b , which is correlated with the outer shell domain structures with circumferentially magnetization easy axis existed in the outer shell of Co-rich magnetic wires with low and negative magnetostriction. Below 1 MHz, only if the bias current is over 1.5mA which induces a magnetic circumferential magnetic field is above the coercivity of 14.4A/m, the circumferential magnetization and GMI effect can experience the bias magnetic field effect. Above 1MHz, the skin effect gets stronger and significantly decreases the total participants of circular magnetization process in the fibers and consequently, the circular outer shell magnetization process gets much sensitive to circular bias magnetic field. AGMI effect with high field sensitivity is realized due to the bias current.

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“…As mentioned above, magnetic bistability typically observed in Fe-rich microwires is explained considering existence of inner axially magnetized singe domain [47]. Therefore for Co-rich microwires with induced magnetic bistability we must consider the domain structure consisting of single-domain inner axially magnetized core and outer domain shell with high circumferential magnetic permeability [48]. This assumption is supported by quite high GMI ratio of annealed Corich microwires exhibiting rectangular hysteresis loop.…”

Section: Tuning Of Magnetic Properties In Magnetic Microwires By Thermentioning

confidence: 92%

Engineering of Magnetic Properties of Magnetic Microwires

Zhukov

Ipatov²,

Blanco

et al. 2018

Acta Phys. Pol. A

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We present an overview of the factors affecting soft magnetic properties, fast domain wall propagation and giant magnetoimpedance (GMI) effect in thin amorphous wires. The magnetoelastic anisotropy is one of the most important parameters that determine the magnetic properties of glass-coated microwires and therefore annealing can be very effective for manipulation the magnetic properties of amorphous ferromagnetic glass-coated microwires. Increasing of DW velocity in Fe-rich and Fe-Ni based (low Ni content) microwires is achieved after annealing. After heat treatment of Co-rich microwires we can observe transformation of inclined hysteresis loops to rectangular and coexistence of fast magnetization switching and GMI effect in the same sample. On the other hand stress annealing of Fe-and Co-rich microwires allows achievement of considerable magnetic softening and GMI effect enhancement.

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Engineering of magnetic properties and GMI effect in Co-rich amorphous microwires

Cited by 40 publications

References 36 publications

Ultrathin Nanocrystalline Magnetic Wires

Ultrathin Nanocrystalline Magnetic Wires

Giant Magneto Impedance Effect of Co-Based Metallic Fiber Under Bias Magnetic Field

Engineering of Magnetic Properties of Magnetic Microwires

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