Study of the ground state properties of LiHo(x)Y(1-x)F4 using muon spin relaxation.
LiHo(x)Y(1-x)F4 is an insulator where the magnetic Ho3+ ions have an Ising character and interact mainly through magnetic dipolar fields. We used the muon spin relaxation technique to study the nature of its ground state for samples with x ≤ 0.25. In contrast with some previous works, we did not find canonical spin glass behavior down to ≈ 15 mK. Instead, below ≈300 mK we observed temperature-independent dynamic magnetism characterized by a single correlation time. The 300 mK energy scale corresponds to the Ho3+ hyperfine interaction strength, suggesting that this interaction may be involved in the dynamic behavior of the system.
Rodriguez
J
J
Department of Physics and Astronomy, McMaster University, Hamilton, ON, Canada, L8S 4M1. Jose.Rodriguez@psi.ch
Aczel
A A
AA
Carlo
J P
JP
Dunsiger
S R
SR
Macdougall
G J
GJ
Russo
P L
PL
Savici
A T
AT
Uemura
Y J
YJ
Wiebe
C R
CR
Luke
G M
GM