Er2Ti2O7: Evidence of Order by Disorder in a Frustrated Antiferromagnet

J. D. M. Champion, M. J. Harris, P. C. W. Holdsworth +14

Er_2Ti_2O_7 has been suggested to be a realization of the frustrated < 111 > XY pyrochlore lattice antiferromagnet, for which theory predicts fluctuation-induced symmetry breaking…