The magnetic and crystal structures of Sr1-δFeO2-xFx, a new oxyfluoride
Bing Li1, John Woods1, Joan Siewenie2
1Department of Physics, University of Virginia, 382 McCormick Road, Charlottesville, VA 22904, USA. louca@virginia.edu.
Abstract:
A new quasi-two-dimensional oxyfluoride, Sr1-δFeO2-xFx, has been successfully synthesized by combining topotactic fluoridation and CaH2 reduction. The introduction of F through this synthesis provides a new route to introducing charge carriers into the square layered lattice through the formation of Fe(1+) ions. While the average crystal symmetry and magnetic structure remain the same as in the parent compound, the addition of F results in an enhanced buckling of the Fe(O/F)2 square plaquettes that is most likely topologically driven.
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