Publication Type
Journal
Journal Name
Physical Review B
Publication Date
Page Number
214434
Volume
85
Issue
21
Abstract
Neutron powder di raction and inelastic measurements were performed examining the 5d py-
rochlore Y2Ir2O7. Temperature dependent measurements were performed between 3.4 K and 290
K, spanning the magnetic transition at 155 K. No sign of any structural or disorder induced phase
transition were observed over the entire temperature range. In addition, no sign of magnetic long-
range order was observed to within the sensitivity of the instrumentation. These measurements do
not rule out long range magnetic order, but the neutron powder di raction structural re nements
do put an upper bound for the ordered iridium moment of 0.2 B=Ir (for a magnetic structure
with wave vector Q 6= 0) or 0.5 B=Ir (for Q = 0).
