Decoupling lattice and magnetic instabilities in frustrated CuMnO${}_2$

Keith V. Lawler, Dean Smith, Shaun R. Evans +8

The $A$MnO${}_2$ delafossites ($A$=Na, Cu), are model frustrated antiferromagnets, with triangular layers of Mn${}^{3+}$~spins. At low temperatures ($T_N$=65 K), a $C2/m \rightarro…