Eur. Phys. J. B 14, 473-476 (2000)
https://doi.org/10.1007/s100510051055

Influence of hydrogen distribution on magnetic properties of amorphous samples

¹ Departemento O. Industrial, E.S.I. Industriales (U.E.M.), V. De Odón, 28670 Madrid, Spain
² Departemento Física de Materiales, Facultad de Física (U.C.M.), 28040 Madrid, Spain
³ Departemento Física Aplicada, E.T.S.I. Telecomunicación (U.P.M.), 28040 Madrid, Spain

Received: 7 May 1999
Revised: 11 October 1999
Published online: 15 April 2000

Abstract

We have studied the effect of the homogeneity of hydrogen distribution on magnetic properties of hydrogen charged amorphous samples (Metglass 2826MB: Fe₄₀Ni₄₀Mo₄B₁₈). The results suggest that, in high magnetostrictive samples, the induced internal stresses and hence the magnetic anisotropy are related to the hydrogen distribution and not to the total quantity of hydrogen inside the sample. To perform this study, the homogeneity of hydrogen distribution in the sample was improved by using a very low rate of hydrogen charging by means of a pulsed electrolytic current. Furthermore, this pulsed electrolytic current allows us to introduce a high quantity of hydrogen without breaking the sample.