Extreme cases of local magnetism

Abstract

By application of the TDPAD method in connection with heavy ion reactions and recoil implantation techniques we have probed the magnetic behaviour of 4f and 3d and 4d transition metal ions under extreme variations of the chemical environment. New unstable 4f systems have been found by implanting the oversized 4f ions in small-volume hosts like e.g. W. The implantation of 3d and 4d ions into alkali metal hosts has led to the discovery of a series of anomalies, e.g. the magnetic behaviour of Fe ions in K, Rb and Cs is consistent with a completely localized 3d shell in spin orbit coupling along with a negligible crystal electrical field splitting and has led to the observation of strong local magnetism in 4d systems. The extreme cases of local magnetism have been found in non-alloying systems.