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Quantized hyperfine field at an implanted $$mu^+$$ site in PrPb$$_3$$; Interplay between localized $$f$$ electrons and an interstitial charged particle

Ito, Takashi; Higemoto, Wataru; Oishi, Kazuki*; Nishida, Nobuhiko*; Heffner, R. H.; Aoki, Yuji*; Amato, A.*; Onimaru, Takahiro*; Suzuki, Hiroyuki*

The local effect of an interstitial hydrogenlike particle on localized $$f$$ electrons was studied in PrPb$$_3$$ by means of $$mu^+$$ spin rotation and relaxation. Spontaneous $$mu^+$$ spin precession with harmonic frequencies was observed for the first time in $$f$$ electron compounds. We demonstrate that the signal is derived from a coupling between the $$mu^+$$ spin and the hyperfine-enhanced nuclear spin of nearest neighbor (NN) $$^{141}$$Pr with Ising-like anisotropy. The signal also suggests a marked suppression of spin dynamics of the NN $$^{141}$$Pr in comparison with that of the bulk $$^{141}$$Pr. These facts strongly indicate modification of the $$f$$ electronic state due to the interstitial charged particle.

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Category:Physics, Multidisciplinary

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