Abstract

Abstract Positive polarized muons ( μ + ) act as non-destructive, non-invasive, and microscopic probes for local investigations. Over the years they have provided unique information about magnetic, superconducting and other electronic properties of bulk matter. A novel extension of the μ SR technique is given by the availability of μ + with 100% spin polarization, and whose energy can be continuously varied from 0.5 to 30 keV. This allows depth-dependent μ SR -studies of thin films, near-surface regions and multilayered structures in the range from ∼ 1 to ∼ 300 nm . After a brief introduction of the present status of this technique, some experiments are overviewed including depth-dependent studies of thin films and heterostructures of various magnetic and superconducting materials, ranging from cuprates through spin glasses to structures and compounds relevant to spintronics applications.

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