Magnetic and Charge-ordered phases in Sr3Fe2O7-x

Special Seminars

Speaker: Darren Peets, Seoul University
Date & Time: February 18, 2014 14:00 - 15:00
Location: UBC, AMPEL 311
Local Contact: Kristen Cassidy
Intended Audience: Graduate

We recently showed that the cubic perovskite SrFeO3, a rare Fe^{^4}+ (3d^{^4}) 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.