Abstract
The magnetic relaxation in MnF 2 has been studied by means of Muon Spin Rotation. An increase was found close to T N in the damping of the precession signal from positive muons implanted in a single-crystal sample. This is attributed to the critical slowing down of the antiferromagnetic spin fluctuations. An orientation-dependent shift in the signal frequency was also detected. The location of the muon in the lattice is tentatively determined.
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