Magnetoelastic Villari Effect in Nanocrystalline Fe73.5Nb3Cu1Si13.5B9 Alloy

Abstract

This paper presents results of investigations on the magnetoelastic Villari effect in nanocrystalline Fe 73.5 Nb 3 Cu 1 Si 13.5 B 9 alloy. The investigations were carried out using a ribbon ring sample. A special cylindrical backing was used in order to obtain uniform compressive stresses --s in the sample. The experiment was performed for compressive stresses up to 10 MPa. The changes of flux density B(--s) were investigated as a function of compressive stresses --s for different values of the magnetizing field. Significant changes of the flux density B and the Villari point were detected. The experimental results are discussed.

Cover Picture: ChemBioChem 4/2002

“…The appearance of an extremum in the B ( σ ) H relation is known as the Villari effect, and the point at which (∂ B /∂ σ ) H = 0 as the Villari point 16. This effect has previously been observed for Metglas alloys (i.e., a maximum was obtained in the B ( σ ) H curve at a relatively low H m ) 15, 16. It means that the magnetic flux B exhibits a maximum value at a critical tensile stress as σ is successively increased under a given H m .…”

Dynamic Magnetic Properties of the Magnetostrictive Rapidly-Quenched Alloys

“…[1,2]), but there are no comprehensive literature reports on the use of rapidly-quenched materials exhibiting high saturation magnetostriction λ s > 25 × 10 −6 and low coercivity H c (2-5 A/m) for these purposes, although these materials are potentially very suitable for this type of applications. The examples of such materials are the Fe 40 Ni 38 Mo 4 B 18 and Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 alloys [3,4], which have been studied under this work.…”

A Simplified Sablik’s Approach to Model the Effect of Compaction Pressure on the Shape of Hysteresis Loops in Soft Magnetic Composite Cores

“…The Jiles-Atherton model including the magnetoelastic term is usually applied for the description of magnetization processes in steels [15][16][17][24][25][26][27][28][29][30]. Papers devoted to other materials of practical importance like amorphous and nanocrystalline alloys [31,32] or ferrites [33] are less common.…”