Investigation of magnetic properties in strong and ultrastrong magnetic fields using the single-turn coil technique: new phenomena in intermetallic compounds and rare-earth zircons

Abstract Magnetic anomalies in rare-earth zircons RXO 4 (X=V, As, P; R-rare-earth ion), which are caused by the crossing of the lowest-lying energy levels of the van Vleck paramagnets, have been studied at different field sweep rates and different cryogenic temperatures. These anomalies occur at about 50 T for PrVO 4 and at about 30 T for TmPO 4 . Recent magnetization measurements of the intermetallic compounds RMn 2 Ge 2 (R=Gd, Tb, Dy, Ho, Er, Y) reveal new magnetic phase transitions for some R in strong magnetic fields up to 150 T.