Magnetization step of isolated Co^2^+ ions in hexagonal Cd"1"-"xCo"xS and Cd"1"-"xCo"xSe - Bindilatti, V.; Oliveira, N.F.; Shapira, Y.; Vu, T.Q.; Heiman, D.; Demianiuk, M. (Elsevier)
In Cd"1"-"xCo"xS and Cd"1"-"xCo"xSe, each isolated Co^2^+ ion behaves as an effective spin S=32. The axial anisotropy results in two Kramers doublets: the lower with S"z = +/-12, and the higher with S"z = +/-32. In a magnetic field H along the c-axis, a level crossing at a field H"c leads to a change of the ground state from S"z = -12 to S"z = -32. As a consequence, at the field H"c a large magnetization step (MST) occurs if the temperature is sufficiently low. This MST, arising from isolated Co^2^+ ions in an axial anisotropy, was observed near 30 mK. A new force magnetometer operating in a plastic dilution refrigerator was used.
http://linkinghub.elsevier.com/retrieve/pii/0038-1098(93)90408-F
Keywords: U