Distinct high-T transitions in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$

R. R. Urbano, E. L. Green, W. G. Moulton +7

In contrast to the simultaneous structural and magnetic first order phase transition $T_0$ previously reported, our detailed investigation on an underdoped Ba${}_{0.84}$K${}_{0.16}$F…