Field-dependent elastic modulus and damping in pure iron, nickel and cobalt

Influence of internal stresses on field-dependent elastic modulus and damping in pure nickel

“…The main details of this experimental method are given in [12]. Some minor features were later enhanced in [3], where the field-dependent elastic modulus and damping in pure iron, nickel and cobalt were measured.…”

“…These effects receive an increasing topical interest as demonstrated by the evolution of the number of publications dealing with magnetoelasticity [1]. Some crystalline pure nickel results about DEÀeffect and magnetomechanical damping were previously published in our recent work [3], where nickel clearly stands out from the rest of classical ferromagnetic materials like iron and cobalt. Now, in this article we want to complete said work including further information about the way in which nickel may become a valuable smart material for some applications and to establish a better understanding of the influence of internal stresses on its magnetoelastic effects.…”

Optimization of magnetoelastic properties of pure nickel by means of heat treatments

“…The former are those in which the variation of the altered properties is reversible, whereas the latter are those in which the recovery of the properties is not necessarily obtained simply on removal of the magnetic or mechanical action. Some crystalline pure nickel results about ∆E-effect and magnetomechanical damping were previously published in our recent work [3]. In said work, nickel clearly stands out from the rest of classical ferromagnetic materials like iron and cobalt, but yet without showing enough variations to be considered a suitable choice for any application.…”

“…The magnetoelastic properties were measured via a recently experimental system which we developed in [9] and enhanced later in [3]. It is based on laser Doppler vibrometry and it turns out to be a suitable method for measuring ∆Eand ∆Ψ-effects: not only is it able to measure both effects simultaneously and accurately, but it also allows us to obtain stress-and path-dependencies.…”

“…Finally we want to emphasize that, leaving aside field-dependence, other influences such as stress-dependence and path-dependence must be considered in our measurements [3]. In order to avoid their influences, we will report only those results which were obtained under 0.50 MPa and following a magnetization path from the state of zero retentivity (M r 0 ) to the state of positive saturation magnetization (M s + ).…”