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Zero-and low-field spin relaxation studied by positive muons

1979; American Physical Society; Volume: 20; Issue: 3 Linguagem: Inglês

10.1103/physrevb.20.850

1095-3795

R. Hayano, Y. J. Uemura, J. Imazato, N. Nishida, Toshitsugu Yamazaki, Ryogo Kubo,

Advanced Battery Materials and Technologies

Zero- and low-field spin-relaxation functions have been studied for the first time by using positive muons, and results are compared with the stochastic theory of low-field relaxation formulated by Kubo and Toyabe. The dipolar broadening of the zero-field relaxation has been studied in detail. In Zr${\mathrm{H}}_{2}$, the zero-field relaxation function of ${\ensuremath{\mu}}^{+}$ has been found to decay ${(5)}^{\mathrm{\textonehalf{}}}$ times faster than the high-field relaxation function, which is explained in terms of the contribution of the nonsecular part of the dipolar interaction. Advantages of the zero-field method over the conventional muon-spin rotation method in practical applications, especially for studies of the ${\ensuremath{\mu}}^{+}$ diffusion/trapping, are discussed.