A mu SR study of CeB2C2

摘要

m(+) spin relaxation measurements on antiferromangetic CeB2C2 with T-N1 = 7.1 K and T-N2 = 6.4 K, were performed under zero-field and longitudinal fields (U). The values of the nuclear dipolar width and the relaxation rate associated with Ce 4f localized electronic moments are estimated. The muon spin polarization at t = 0 decreases sharply at T-N1, indicating magnetic long-range order. The LF dependence of the time spectrum at T = 3.1 K (< T-N2) and T = 6.8 K (> T-N2) is different. At T = 3.1 K, the observed spectra depend strongly on the LF and a decoupling process is observed, while that at T = 6.8 K they do not change their shape up to the maximum field applied in this work. It is suggested that the local fields in the intermediate phase fluctuate strongly. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 6]