It was noted that the development of a low-energy muon beam offered the possibility of studying muon diffusion in artificially layered structures at the nm-scale. Muon diffusion experiments on various Cr/Au(x nm)/Cr tri-layers (with x = 19, 21, 30 or 39), at 5 to 320K, were reported. It was found that, if an appropriate implantation energy was used, the initial muon implantation profile was centered within the non-magnetic Au layer.

Muons which stopping in the magnetic Cr, or penetrated the Au/Cr interface by thermally activated diffusion, immediately lost their spin polarization. The depolarization of the LE-μSR signal permitted estimation of the time-dependent fraction of muons which reached one of the interfaces.

Diffusion of Muons in Metallic Multilayers. H.Luetkens, J.Korecki, E.Morenzoni, T.Prokscha, N.Garifyanov, H.Glückler, R.Khasanov, F.J.Litterst, T.Slezak, A.Suter: Physica B, 2003, 326[1-4], 545-9