A. Schenck et al., HIGH-TEMPERATURE MAGNETIC ORDER IN THE SINGLET-GROUND-STATE COMPOUND PRCU2, Physical review. B, Condensed matter, 58(9), 1998, pp. 5205-5208
It is known that PrCu2 shows a modulated antiferromagnetic structure b
elow T-N=(50-60) mK that is claimed to be of a cooperative nuclear-ele
ctronic nature [S. Kawarazaki and J. Arthur, J. Phys. Sec. Jpn. 51, 10
77 (1988)]. Here we report on an observation by muon spin-rotation spe
ctroscopy that this order seems to persist on a short-range scale with
an apparently unchanged structure up to 60 K, i.e., up by three order
s of magnitude as compared with T-N. We conjecture that the apparent m
agnetic order is of a secondary nature and the primary mechanism invol
ves quadrupolar effects.