Study of domain structure and magnetization reversal after thermal treatments in Fe40Co38Mo4B18 microwires

Klein, Peter; Varga, R.; Badini-Confalonieri, G. A.; Vázquez, M.

doi:10.1016/j.jmmm.2011.07.027

Cited by 16 publications

(14 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 shows perfectly bistable quasistatic hysteresis loops of the FeCoMoB microwires in the initial asprepared state and in nanocrystalline sample after annealing by current density of 500 MA/m 2 for 10 min. It is worth to note that studied FeCoMoB-based microwire does not lose its bistability even after annealing at very high temperatures (or current densities) [12].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Current Annealing on Domain Structure in Amorphous and Nanocrystalline FeCoMoB Microwires

Klein¹,

Varga²,

Onufer³

et al. 2017

Acta Phys. Pol. A

Self Cite

View full text Add to dashboard Cite

The influence of current annealing on the complex domain structure in amorphous and nanocrystalline FeCoMoB microwire has been studied. The thickness of radial domain structure together with the switching field of single domain wall change as a consequence of variation of complex internal stress distribution inside metallic core. Firstly, radial domain structure thickness monotonously increases with increasing annealing DC current density for amorphous state. Switching field exhibits local minimum in nanocrystalline sample annealed at 500 MA/m 2 for 10 min when the lowest thickness of outer shell (182 nm) was observed. Such annealed sample (which magnetic properties exhibit excellent temperature stability) is suitable candidate for miniaturized sensor construction for sensing the magnetic field or mechanical stress.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The thickness of outer shell covering internal axial monodomain was estimated using the relationship [12]:…”

Section: Resultsmentioning

confidence: 99%

Effect of Current Annealing on Domain Structure in Amorphous and Nanocrystalline FeCoMoB Microwires

Klein¹,

Varga²,

Onufer³

et al. 2017

Acta Phys. Pol. A

Self Cite

View full text Add to dashboard Cite

show abstract

“…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].…”

mentioning

confidence: 99%

“…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.…”

mentioning

confidence: 99%

“…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].…”

mentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2020

View full text Add to dashboard Cite

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.

show abstract

Addition of molybdenum into amorphous glass‐coated microwires usable as temperature sensors in biomedical applications

Hudák¹,

Varga

Poláček³

et al. 2015

Physica Status Solidi (a)

View full text Add to dashboard Cite

Compared to other sensors, such as radio‐frequency identification sensors, microwires have a significant advantage due to their small dimensions and contact‐free reading. The most important advantage is that a microwire is considered to be a biocompatible material due to the glass‐coating insulator. This is particularly applicable in various titanium implants (dental, knee joint, replacement of damaged skull part, repair of the femur, etc.). The temperature dependence of the switching field can be employed to monitor inflammatory processes. In this contribution we present the influence of molybdenum (Mo) content on the magnetic properties and thermal treatment in order to obtain a strong variation of the switching field to temperature. We show that stress annealing of a FeMo9BCu microwire at 775 K under an applied axial stress of 309 MPa leads to the strongest variation in a temperature range from 300 to 315 K, which is highly desirable for biomedical applications.

show abstract

Study of domain structure and magnetization reversal after thermal treatments in Fe40Co38Mo4B18 microwires

Cited by 16 publications

References 19 publications

Effect of Current Annealing on Domain Structure in Amorphous and Nanocrystalline FeCoMoB Microwires

Effect of Current Annealing on Domain Structure in Amorphous and Nanocrystalline FeCoMoB Microwires

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

Addition of molybdenum into amorphous glass‐coated microwires usable as temperature sensors in biomedical applications

Contact Info

Product

Resources

About