TRIUMF

Exp. No.

M1714 — Approved

Title of Experiment

Domains dynamics in single crystal of Er2Ti2O7

Spokesperson(s) for Group

Current Members of Group

Name Institution Status % of research time devoted to experiment
Gaudet, J McMaster Student (PhD)
G.M. Luke McMaster University Professor
J. Beare McMaster University Student (PhD)
Y. Cai McMaster University Student (PhD)
S.C. Cheung Columbia University Student (PhD)
Z. Guguchia Paul Scherrer Institute Research Scientist
A.M. Hallas McMaster University Student (PhD)
Y.J. Uemura Columbia University Professor
M.N. Wilson McMaster University Student (PhD)
Z. Gong Columbia University Student (PhD)

Abstract

Er2Ti2O7 is an XY pyrochlore antiferromagnet for which the selection of its magnetic ground state is argued to originate from order-by-disorder effects. Order-by-disorder ground state selection is extremely rare in nature and thus, Er2Ti2O7 is a wonderful playground to study such phenomena. Er2Ti2O7 is also unique because its magnetically ordered state is a very rare example of Z6 discrete symmetry breaking. The effect of an applied field on this discrete symmetry breaking system has been theoretically studied and it has been shown that emergent Zeeman clock anisotropies arise for fields applied along various high symmetry directions. These domain transitions has been observed by our group using inelastic neutron scattering. However, for this proposal, we are interested in probing the dynamics of domain effects for which the time scale is perfectly suited for muSR.