Persistent Spin Dynamics Intrinsic to Amplitude-Modulated Long-Range Magnetic Order
Persistent Spin Dynamics Intrinsic to Amplitude-Modulated Long-Range Magnetic Order
An incommensurate elliptical helical magnetic structure in the frustrated coupled-spin-chain system FeTe2O5Br is surprisingly found to persist down to 53(3) mK (T/T_N ~ 1/200), according to neutron scattering and muon spin relaxation. In this state, finite spin fluctuations at T -> 0 are evidenced by muon depolarization, which is in …