Magnetic ordering in the spin-ice candidate Ho2Ru2O7.
Neutron scattering measurements on the spin-ice candidate material Ho2Ru2O7 have revealed two magnetic transitions at T approximately 95 and approximately 1.4 K to long-range ordered states involving the Ru and Ho sublattices, respectively. Between these transitions, the Ho3+ moments form short-ranged ordered spin clusters. The internal field provided by the ordered S=1 Ru4+ moments disrupts the fragile spin-ice state and drives the Ho3+ moments to order. We have directly measured a slight shift in the Ho3+ crystal field levels at 95 K from the Ru ordering.
Wiebe
C R
CR
Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada. cwiebe@brocku.ca
Gardner
J S
JS
Kim
S-J
SJ
Luke
G M
GM
Wills
A S
AS
Gaulin
B D
BD
Greedan
J E
JE
Swainson
I
I
Qiu
Y
Y
Jones
C Y
CY