Abstract
Elastic neutron scattering, ac susceptibility, and specific heat experiments on the pyrochlores and show that both systems are antiferromagnetically ordered in the manifold. The ground state is a phase for the Er sample and a or phase for the Yb sample, which suggests “Order by Disorder” physics. Furthermore, we unify the various magnetic ground states of all known (, Yb; , Ti, Ge) compounds through the enlarged -type exchange interaction under chemical pressure. The mechanism for this evolution is discussed in terms of the phase diagram proposed in the theoretical study by Wong et al. [Phys. Rev. B 88, 144402 (2013)].
- Received 9 April 2015
- Revised 16 September 2015
DOI:https://doi.org/10.1103/PhysRevB.92.140407
©2015 American Physical Society