Abstract
The spin dynamics of a polarized muon at an interstitial lattice site interacting with four or six nearest neighbouring nuclear spins withJ=1/2 has been investigated. The difference from the results of the Kubo-Toyabe theory is pointed out. The interaction of a muon with four nuclei with spinJ=1 including both dipolar and quadrupolar effects is considered, and some numerical results are shown.
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References
R. Kubo and T. Toyabe, in: Magnetic Resonance and Relaxation, ed. R. Blinc (North-Holland, Amsterdam, 1966)
R.S. Hayano, Y.J. Uemura, J. Imazato, N. Nishida, T. Yamazaki, and R. Kubo, Phys. Rev.B 20 (1979) 850
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M. Celio and P.F. Meier, Phys. Rev.B 27 (1983) 1908. K. Petzinger pointed out to us that the zero-field relaxation function for a muon at an octahedral or tetrahedral interstitial site is isotropic. The curve labelled «100» in Fig. 2 is indeed wrong and the function calculated for the polycrystalline average applies to all directions.
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Celio, M., Meier, P.F. Exact calculation of the muon polarization function. Hyperfine Interact 18, 435–440 (1984). https://doi.org/10.1007/BF02064849
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DOI: https://doi.org/10.1007/BF02064849