Orphan spins and bound in-gap states in the $S=\frac{5}{2}$ antiferromagnet CaFe${}_2$O${}_4$

C. Stock, E. E. Rodriguez, N. Lee +11

CaFe${}_2$O${}_4$ is an anisotropic $S=\frac{5}{2}$ antiferromagnet with two competing $A$ ($\uparrow \uparrow \downarrow \downarrow$) and $B$ ($\uparrow \downarrow \uparrow \downar…