Hyperfine interaction studies on swift O-ions emerging with polarized electrons from ferromagnetic layers into vacuum

Abstract

Abstraet.A precision plunger set-up was used to determine in time-differential measurements of hyperfine interactions the degree of polarization of Is-and 2s-electrons in H-and Li-like oxygen ions on their emergence from magnetized Ni-and Gd-layers into vacuum. In addition a time-integral measurement with Fe-layers served to obtain the polarization of 2s-electrons only. For all three ferromagnetic materials the degree of polarization of 2s-electrons is found to be twice as large as for Is-electrons. The data are discussed in the context of transient magnetic fields and their underlying polarization mechanism.

On the ion beam stopping power dependence of transient magnetic fields in Fe- and Gd-hosts

“…This electron orbital dependence [14] of the ion-beam induced attenuations could also be an artefact in the sense that (2) (which has been used for the quantification of the attenuation) is not an overall adequate description of TF data bearing in mind that higher electron orbitals refer to lower ion velocities and the degree of polarization might be different as well. An orbital dependence of the degree of polarization was found only recently in measurements on 160-ions for which the 2s-electron polarization turned out to be twice as large as for the is-electrons [15,16]. It should be noted that the electron orbital dependence of the attenuations was earlier discussed in just this context [14].…”