Recent Topics of μSR Studies on High-Tc Systems

History of the muon spin relaxation (μSR) measurements dates back to the late 1950’s and 60’s following the discovery of parity violation. The application of μSR to condensed matter physics has steadily developed1 in the 70′s and early 80′s; mainly in the study of magnetic properties of ferro- or antiferromagnets and spin glasses. Extensive μSR studies on high-Tc systems2–4 have increased the recognition of this technique as one of the very powerful experimental methods in the study of magnetism and superconductivity.