The magneto-elastic Villari effect in ferrites

Information about magnetoelastic properties of newly developed amorphous magnetic alloys is very important from practical point of view, especially in the case of high permeability materials such as the Fe61Co19Si5B15 amorphous alloy. In the case of such materials, eect connected with the inuence of external stresses on the magnetic properties of the alloy should be tested. This paper presents experimental results of the magnetoelastic properties investigation of the Fe61Co19Si5B15 amorphous alloy, annealed without magnetic eld as well as in the magnetic eld. Such thermo-magnetic treatment generated anisotropy has signicant inuence on the total free energy of magnetic material. In the magnetoelastic investigation, the compressive stress was applied to the ring shaped core, perpendicularly to the magnetizing eld direction. Due to the fact, that cores with closed magnetic circuits were used, demagnetization did not change the balance of total free energy in the material.

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“…Measuring and magnetizing windings are placed in grooves (2a) of the special, nonmagnetic cylindrical xtures (2).…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Sometimes the extreme on the B(σ) Hm characteristic may be observed. This extreme is known as the Villari point [2]. It was conrmed that for compressive stress σ corresponding to the Villari point, magnetostriction λ s of the material changes its sign [3].…”

mentioning

confidence: 99%

The Influence of Thermomagnetic Treatment on the Magnetoelastic Characteristics of Fe₆₁Co₁₉Si₅B₁₅Amorphous Alloys

Salach

Szewczyk²,

Švec³

et al. 2015

Acta Phys. Pol. A

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“…Sometimes a peak on the B(σ) Hm characteristic may be observed. This extreme is known as the Villari point [2]. It was confirmed, that for compressive stress σ causing the Villari point, magnetostriction λ s of the material changes its sign [3].…”

Section: Introductionmentioning

confidence: 90%

The temperature dependence of the magnetoelastic characteristics of cores for force sensors utilizing Fe70Ni8Si10B12 amorphous alloy

2008

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This paper presents the results of investigation on the influence of temperature on magnetoelastic characteristics of the two ring-shaped cores, made of Fe70Ni8Si10B12 amorphous alloy. The cores were annealed for 1 h at 350 and 400 • C, respectively. The compressive force F was applied perpendicular to the direction of the magnetizing field H in the sample. Special cylindrical backing enables application of the uniform compressive stress σ to the wound ring sample. A resistive furnace heated the experimental set-up. Results presented in the paper indicate a significant influence of the temperature on the magnetoelastic characteristics of Fe70Ni8Si10B12 amorphous alloy. Information about the magnetoelastic characteristics of this material may be useful in the magnetoelastic sensor development. Also this will create new possibilities in the development of physical model of magnetoelastic effect.

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“…In a general case, for anisotropic materials, this curve given by the equation [24,25]: (4) where θ is the integration parameter and E(i), is given by the following relationship [24]: (5) where a quantifies domain wall density, K an is the anisotropic energy density, ϕ1=ψ -θ and ϕ2=ψ +θ, where ψ is an angle between the easy axis of the material and the magnetizing field direction.…”

Section: Principles Of the Jiles-atherton-sablik Modelmentioning

confidence: 99%

“…This effect is connected with the changes of flux density B (achieved for a given value of the magnetizing field H) in the material subjected to mechanical stresses σ. The magnetoelastic Villari effect was observed in steel [2,3,4], soft ferrites [5] as well as amorphous [6,7] and nanocrystalline [8,9] soft magnetic materials.…”

Section: Introductionmentioning

confidence: 99%

Stress-Induced Anisotropy and Stress Dependence of Saturation Magnetostriction in the Jiles-Atherton-Sablik Model of the Magnetoelastic Villari Effect

Szewczyk¹

2016

Archives of Metallurgy and Materials

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The paper presents the results of the magnetoelastic Villari effect modelling in high-permeability Mn0.51zn0.44Fe2.05O4 ferrite. Modelling was performed on the basis of measurements of magnetoelastic characteristics of frame-shaped samples. For the modelling, the corrected Jiles-Atherton-Sablik model was used. On the base of modelling results, the stress dependence of parameter k and stress-induced anisotropy were estimated. As a result the changes of saturation magnetostriction of Mn0.51zn0.44Fe2.05O4 ferrite subjected to stresses were calculated. Such changes were previously observed experimentally. However, the phenomenon of stress-induced sign change of saturation magnetostriction was never previously explained quantitatively.

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The magneto-elastic Villari effect in ferrites

Cited by 40 publications

References 1 publication

The Influence of Thermomagnetic Treatment on the Magnetoelastic Characteristics of Fe₆₁Co₁₉Si₅B₁₅Amorphous Alloys

The Influence of Thermomagnetic Treatment on the Magnetoelastic Characteristics of Fe₆₁Co₁₉Si₅B₁₅Amorphous Alloys

The temperature dependence of the magnetoelastic characteristics of cores for force sensors utilizing Fe70Ni8Si10B12 amorphous alloy

Stress-Induced Anisotropy and Stress Dependence of Saturation Magnetostriction in the Jiles-Atherton-Sablik Model of the Magnetoelastic Villari Effect

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The magneto-elastic Villari effect in ferrites

Cited by 40 publications

References 1 publication

The Influence of Thermomagnetic Treatment on the Magnetoelastic Characteristics of Fe61Co19Si5B15Amorphous Alloys

The Influence of Thermomagnetic Treatment on the Magnetoelastic Characteristics of Fe61Co19Si5B15Amorphous Alloys

The temperature dependence of the magnetoelastic characteristics of cores for force sensors utilizing Fe70Ni8Si10B12 amorphous alloy

Stress-Induced Anisotropy and Stress Dependence of Saturation Magnetostriction in the Jiles-Atherton-Sablik Model of the Magnetoelastic Villari Effect

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The Influence of Thermomagnetic Treatment on the Magnetoelastic Characteristics of Fe₆₁Co₁₉Si₅B₁₅Amorphous Alloys

The Influence of Thermomagnetic Treatment on the Magnetoelastic Characteristics of Fe₆₁Co₁₉Si₅B₁₅Amorphous Alloys