Power spectrum of magnetic relaxation in spin ice: anomalous diffusion in a Coulomb fluid

D. Billington, E. Riordan, C. Cafolla-Ward +7

Magnetization noise measurements on the spin ice Dy${}_2$Ti${}_2$O${}_7$ have revealed a remarkable `pink noise' power spectrum $S(f,T)$ below 4 K, including evidence of magnetic m…