The combined use of low-temperature magnetometry and polarized neutron reflectometry has studied the effect of hydrogenation on the structural and magnetic properties of multilayer nanostructures Gd(180 Å)/Fe(35 Å)×10. It was found that in gadolinium layers near the interlayer boundaries, layers with a thickness of about 12 Å, in which the hydrogen concentration is reduced significantly, and the magnetic moment at room temperature is close to the magnetic moment of bulk gadolinium at low temperatures. This effect can be attributed to the proximity of Fe layers, which is known in Fe/Gd non-hydrogenated superlattices.
Makarova et al. (2025) studied this question.