Frequency, magnetic field and size dependence of the magnetic properties of amorphous soft-magnetic fibers

Rudkowski, P.; Ström‐Olsen, J. O.

doi:10.1016/s0304-8853(02)00511-5

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…When the external field compensates for the anisotropy field, the circular permeability gets the largest values and the MI peak appears. It is investigated that the coercivity increases as diameter increases 19 and the effective anisotropy field H m also increase as frequency 20 . For this reason, GMI effect will decreases when the diameter is over than 35 μm.…”

Section: Resultsmentioning

confidence: 99%

Diameter Dependence of Magnetic Properties of Co-based Metal Fibers

2019

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Naked Co 68.25 Fe 4.5 Si 12.25 B 15 metal fibers with diameter from 25 μm to 100 μm are produced by melt extraction method. Significant diameter dependence of magnetic properties is studied. Their microstructure and magnetic properties of hysteresis loops and giant magneto impedance (GMI) effect at frequencies from 0.1MHz to13MHz are investigated. The results show that the coercivity increases with the diameter of fibers and the GMI effect is best in fiber with a diameter of 35μm. It is found that the cooling rate of solidification decreases with the increase of fiber diameter. And fibers are amorphous with the diameter of 50μm and there are nanocrystallines in fibers with a diameter of 85μm. The grain boundary blocks the magnetization process which makes lower circular permeability, larger coercivity and lower field sensitivity of GMI effect. The original microstructure of Co-based fibers decides their magnetic properties. Therefore, material design is important to improve the GMI effect in magnetic field sensor making.

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Section: Resultsmentioning

confidence: 99%

Diameter Dependence of Magnetic Properties of Co-based Metal Fibers

2019

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“…Characteristic feature of this process is its elasticity and the ease of producing concentrated and homogeneous solutions of cellulose (Laszkiewicz, 1997). These composites are also called electronic composites, as they have many applications in structures of microelectronic, nano‐electronic devices, micro‐electro‐mechanical systems (MEMS) and bio‐MEMSs (Rudkowski and Ström‐Olsen, 2002).…”

Section: Introductionmentioning

confidence: 99%

Computer models of 3D magnetic microfibres used in textile actuators

Wiak

Firych‐Nowacka

Smółka

2010

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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PurposeThe purpose of this paper is to discuss the idea of designing and manufacturing intelligent clothes with magnetic fibres. The main goal of the research is to create the universal generator of computer structural models for whole bundles of magnetic microfibres.Design/methodology/approachThe paper presents the algorithm of magnetic microfibers computer modelling. It covers both finite element method (FEM) and reluctance network method. This paper deals with creating 3D computer structural models of magnetic microfibres, which could be introduced as the textile magnetic sensors or actuators. Because of very complicated 3D microfibres structure, it is hoped that the quickest possible method can be found to solve the problem.FindingsThe results focus on the methodology presented in the paper which can be implemented in building 3D equivalent B/H curve of the microfibers set by using the field method – combining reluctance network method and FEM. Defining the proper magnetic B/H curves of magnetic fibres will enable the production of smart and resistant clothes.Originality/valueFirst, the paper presents the original idea of modelling magnetic microfibres by use of the reluctance network method. So far, there are only measurements characteristics of B/H curve of magnetic microfibres. The paper proposes an innovatory way of determining magnetic microfibres parameters. This universal computer models allows for evaluation of a limiting value of magnetization (magnetic permeability, etc.).

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“…This results in an implementation of the ferromagnetic into the fibre, which becomes a macroscopic, monolithic material called a composite, as the polymer (the matrix) together with the powder filler make a discontinuous phase (Figure 1). These composites are also called electronic composites, as they have many applications in structures of microelectronic and nano-electronic micro-mechanical systems and bio-micro-mechanical systems (Rudkowski and Ström-Olsen, 2002).…”

Section: Introductionmentioning

confidence: 99%

Magnetic microfibres modelling methods

Wiak

Firych‐Nowacka

Smółka

2010

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose -The purpose of this paper is to describe research into the problem of creating computer structural models of magnetic microfibres. The main goal of the research is to create the universal generator of computer structural models for whole bundles of magnetic microfibres. Design/methodology/approach -The paper presents the algorithm of magnetic microfibres computer modelling. It covers both finite element method (FEM) and reluctance network method. Because microfibres with ferromagnetic grains have very complicated 3D structure, the quickest possible method was chosen. Findings -The results focus on the methodology presented in the paper which can be implemented in building 3D equivalent B/H curve of the microfibres set by use of field method -combining reluctance network method and FEM. Defining the proper magnetic B/H curves of magnetic fibres will enable the production of smart and resistant clothes. Originality/value -To date there are only measurements characteristics of B/H curve of magnetic microfibres. This paper proposes an innovatory way of determining magnetic microfibres parameters. This universal computer model allows the evaluation of the limiting value of magnetization (magnetic permeability, etc.).

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Frequency, magnetic field and size dependence of the magnetic properties of amorphous soft-magnetic fibers

Cited by 5 publications

References 4 publications

Diameter Dependence of Magnetic Properties of Co-based Metal Fibers

Diameter Dependence of Magnetic Properties of Co-based Metal Fibers

Computer models of 3D magnetic microfibres used in textile actuators

Magnetic microfibres modelling methods

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