Speaker: Darren Peets, Seoul University
Time: February 18, 2014 14:00 - 15:00
We recently showed that the cubic perovskite SrFeO3, a rare Fe4+ (3d4) compound which exhibits several oxygen-ordered phases as the oxygen content is reduced from 3 to 2.5, hosts far more magnetic phases than previously imagined. Better control over oxygen content has also now been applied to the bilayer counterpart, insulating Sr3Fe2O7, of which far less is known. We have determined its magnetic phase diagram with doping, finding several intriguing new phases. This material also exhibits a charge-order-driven structural transition that had not been previously observed.