mu⁺SR study of zero-field magnetic ordering in CsC₆₀

Abstract

We have measured the zero-field muon spin relaxation (ZF <em>μ</em>⁺SR) spectra of the quasi-one-dimensional fulleride conductor CsC₆₀. Static magnetic order of a random nature develops gradually below about 30 K. The local field distribution at the muon site has a Gaussian shape with a width of 48.3(7) G at 2.8 K. Muon spin rotation (TF <em>μ</em>⁺SR) measurements at an applied transverse field of 6 kG also show the onset of magnetic order in the same temperature range.