TY - RPRT TI - Superparamagnetic spin dynamics studied using selective excitation double Mössbauer spectroscopy. AU - van Lierop J AU - D H Ryan PY - 2000 DO - 10.1103/physrevlett.85.3021 UR - https://pubmed.ncbi.nlm.nih.gov/11005993/ ID - 11005993 ER -