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arXiv · 2609.36868

Quantized Hyperfine Field at an Implanted $μ^+$ Site in PrPb$_3$: Interplay between Localized $f$ Electrons and an Interstitial Charged Particle

T. U. Ito·W. Higemoto·K. Ohishi·N. Nishida·R. H. Heffner·Y. Aoki·A. Amato·T. Onimaru·H. S. Suzuki
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Abstract

The local effect of an interstitial hydrogen-like particle on localized $f$ electrons was studied in PrPb$_3$ by means of $μ^+$ spin rotation and relaxation. Spontaneous $μ^+$ 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 $μ^+$ 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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T. U. Ito, W. Higemoto, K. Ohishi, N. Nishida, R. H. Heffner, Y. Aoki, A. Amato, T. Onimaru, H. S. Suzuki. 2026-09-29. Quantized Hyperfine Field at an Implanted $μ^+$ Site in PrPb$_3$: Interplay between Localized $f$ Electrons and an Interstitial Charged Particle. https://doi.org/10.1103/physrevlett.102.096403

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