Magnetic order and spin dynamics across a ferromagnetic quantum critical point: $\mu$SR investigations of YbNi${}_4$(P${}_{1-x}$As${}_x$)${}_2$

R. Sarkar, J. Spehling, P. Materne +5

In the quasi-1D heavy-fermion system YbNi${}_4$(P${}_{1-x}$As${}_x$)${}_2$ the presence of a ferromagnetic (FM) quantum critical point (QCP) at $x_c$ $\approx 0.1$ with unconventional quan…