Magnetostriction of Co–Fe-Based Amorphous Soft Magnetic Microwires

Zhukov, А.; Churyukanova, M.; Kaloshkin, S.D.; Sudarchikova, V.; Гудошников, С.А.; Ipatov, M.; Talaat, A.; Blanco, Juan Maria

doi:10.1007/s11664-015-4011-2

Cited by 67 publications

(34 citation statements)

References 31 publications

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“…(2) [13]. Moreover recently we have confirmed this assumption by direct measurements of the magnetostriction coefficient in as-prepared and annealed Co-rich microwires [16,17].…”

Section: Resultssupporting

confidence: 70%

Tailoring of Magnetic Properties and Magnetoimpedance Effect in Thin Amorphous Wires

Zhukov¹,

Talaat

Ipatov³

et al. 2016

Acta Phys. Pol. A

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We have studied the effect of annealing conditions on magnetic properties of amorphous CoFeNi-based glasscoated 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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“…(2) [13]. Moreover recently we have confirmed this assumption by direct measurements of the magnetostriction coefficient in as-prepared and annealed Co-rich microwires [16,17].…”

Section: Resultssupporting

confidence: 70%

Tailoring of Magnetic Properties and Magnetoimpedance Effect in Thin Amorphous Wires

Zhukov¹,

Talaat

Ipatov³

et al. 2016

Acta Phys. Pol. A

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“…We studied magnetic properties and GMI effect in Fe 75 B 9 Si 12 C 4 (metallic nucleus diameter, d = 15.2 µm, total diameter, D = 17.2 µm) and Co 69.2 Fe 4.1 B 11.8 Si 13.8 C 1.1 (d = 25.6 µm; D = 30.2 µm) microwires prepared by using the Taylor-Ulitovsky technique described elsewhere [11,12]. Fe-rich composition presents positive and high magnetostriction coefficient, λs (about 40 × 10 −6 ) [22,23], while Co-rich wires have low negative and vanishing magnetostriction values (about −3 × 10 −7 ) [40,41].…”

Section: Methodsmentioning

confidence: 99%

“…In contrast to as-prepared Fe-rich samples, as-prepared Co-rich microwires with low negative magnetostriction values (−3 × 10 −7 ) [41] displayed linear and almost unhysteretic hysteresis loops (see Figure 6a). However, as we recently reported elsewhere [43,44], considerable magnetic hardening (coercivity rising by more than one order of magnitude) and transformation of linear hysteresis loop into rectangular is observed even after short-time annealing of Co-rich microwires (Figure 6b).…”

Section: Effects Of Stress-annealing On Magnetic Properties and Gmi Ementioning

confidence: 96%

Stress-Induced Magnetic Anisotropy Enabling Engineering of Magnetic Softness and GMI Effect of Amorphous Microwires

et al. 2020

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Stress-annealing enabled a considerable improvement in the GMI effect in both Fe-and Co-rich glass-coated microwires. Additionally, a remarkable magnetic softening can be achieved in stress-annealed Fe-rich microwires. Observed stress-annealing induced magnetic anisotropy is affected by annealing conditions (temperatures and stresses applied during annealing). The highest GMI ratio up to 310% was obtained in stress-annealed Co-rich microwires, although they presented rectangular hysteresis loops. A remarkable magnetic softness and improved GMI ratio over a wide frequency range were obtained in stress-annealed Fe-rich microwires. Irregular magnetic field dependence observed for some stress-annealing conditions is attributed to the contribution of both the inner axially magnetized core and outer shell, with transverse magnetic anisotropy.Appl. Sci. 2020, 10, 981 2 of 11 with respect to the varying of external stimuli, such as magnetic field, mechanical load and heat [30][31][32]. Consequently, metamaterials incorporating arrays of magnetic wires in fiber-reinforced polymer composites are potentially suitable for engineering of electromagnetic functionalities and stress/temperature monitoring.Industrial applications based on the GMI effect demand a size reduction of the magnetic element [16,17]. Therefore, the development of thin wires exhibiting GMI effect has become a topic of intensive research [4,5,[11][12][13][14][15]. Among different preparation techniques of magnetic wires, the so-called Taylor-Ulitovsky method allows for the thinnest wires' fabrication and reduced dimensions [11][12][13][14][15][16][31][32][33]. In order to observe the GMI effect in thin wires, the skin depth should be lower than the radius of the wire. As such, a decrease in diameter should be associated with an increase in the frequency range for observation of the GMI effect [34,35]. Besides these technical features, the overall cost should be also considered for applications (e.g., smart composites with wire inclusions) where substantial amounts of wires are required.Excellent soft magnetic properties with enhanced GMI effects are usually reported for as-prepared Co-rich [11][12][13][14][15] and nanocrystalline Fe-rich magnetic microwires [36,37]. The latter are often accompanied with an inherent brittleness of samples over the course of the nanocrystallization process, and therefore alternative stress-annealing approaches have been proposed, to enhance the GMI effect retaining the amorphous structure [38,39]. Stress-annealing can be performed in a temperature range well below the crystallization onset. In addition, the degree of stress-induced anisotropy can be selectively tuned through optimal annealing temperature, time and/or different values of applied stresses. Thus, this contribution aims at providing comparative studies on the effect of stress-induced anisotropy on magnetic softness and GMI effect in Fe-and Co-rich magnetic microwires.

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“…Здесь K -константа одноосной анизотропии, которая не связана с магнитострикционными взаимодействиями, θ -угол между намагниченностью и осью провода, λ -константа магнитострикции, которая для аморфных сплавов может существенно зависеть от растягивающих напряжений [17][18][19] …”

Section: анализ статической намагниченностиunclassified

Влияние механических напряжений и отжига на магнитную структуру и магнитоимпеданс аморфных CoFeSiBCr микропроводов

Неъматов¹,

Салем²,

Азим³

et al. 2018

Физика Твердого Тела

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Структурные и магнитные свойства аморфных ферромагнитных микропроводов могут претерпевать значительные изменения в результате воздействия внешних механических напряжений и температурной обработки. Изучение происходящих при этом трансформаций представляется важным как для разработки различных сенсоров механических напряжений, нагрузки, температуры, так и для индуцирования в проводах определенного типа магнитной анизотропии, играющей значительную роль в осуществлении в них различных эффектов. В настоящей работе исследовано влияние внешних напряжений и отжига на процессы намагничи-вания и магнитный импеданс в микропроводах состава Co 71 Fe5B 11 Si 10 Cr 3 , которые в аморфном состоянии имеют невысокую положительную магнитострикцию (порядка 10 −8 ). Воздействие внешних напряжений приводит к резкому изменению характера кривой перемагничивания, что обусловлено изменением знака магнитострикции и типа магнитной анизотропии. Соответственно амплитуда высших гармоник и величина магнитного импеданса оказываются чувствительными к механическим напряжениям. В проводах с частичной кристаллизацией действие упругих напряжений не приводит к заметному изменению магнитных свойств, однако с помощью отжига можно добиться существенного увеличения осевой магнитной анизотропии проводов, находящихся в напряженном состоянии. Экспериментальные результаты проанализированы в рамках магнитострикционной модели наведенной магнитной анизотропии.

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Magnetostriction of Co–Fe-Based Amorphous Soft Magnetic Microwires

Cited by 67 publications

References 31 publications

Tailoring of Magnetic Properties and Magnetoimpedance Effect in Thin Amorphous Wires

Tailoring of Magnetic Properties and Magnetoimpedance Effect in Thin Amorphous Wires

Stress-Induced Magnetic Anisotropy Enabling Engineering of Magnetic Softness and GMI Effect of Amorphous Microwires

Влияние механических напряжений и отжига на магнитную структуру и магнитоимпеданс аморфных CoFeSiBCr микропроводов

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