The spin relaxation processes within the pyrochlore Ho2Ru 2O7 have been investigated by neutron scattering and bulk property techniques. A single-ion process, that is thermally activated, dominates the spin-spin relaxation spectrum above 2 K. Assuming Arrhenius behaviour, we found an activation energy Δ ≤ (329 ± 6) K and characteristic relaxation time τ0 ≤ (5.2 ± 0.3) × 10-12s in the paramagnetic state, akin to those found in the spin ice, Ho2Ti2O7. Atlow temperature (T<95K) the activation energy lowers and below 20K the entropy and ac susceptibility are similar to that observed in other spin ice compounds within a 10kOe field.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics