Ja. Stride et al., Observation of magnetic coupling between distant metal centers in K-3(MnO4)(2) by muon spin relaxation measurements, CHEMPHYSCHE, 2(11), 2001, pp. 683
The site of a probe muon in the double salt K-3(MnO4)(2), which exhibits an
antiferromagnetic phase at low temperature, and . the Neel temperature of
the salt were determined by zero-field . muon spin relaxation. The picture
shows the relaxation of the polarization asymmetry after muon insertion and
a part of the crystal lattice.