Solitary magnons in the $S=\frac{5}{2}$ antiferromagnet CaFe${}_2$O${}_4$

C. Stock, E. E. Rodriguez, N. Lee +10

CaFe${}_2$O${}_4$ is a $S=\frac{5}{2}$ anisotropic antiferromagnet based upon zig-zag chains having two competing magnetic structures, denoted as the A ($\uparrow \uparrow \downarro…