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La-NMR study on a La dilute system of PrPb$$_3$$

Tokunaga, Yo  ; Suzuki, Hiroyuki*; Sakai, Hironori   ; Chudo, Hiroyuki ; Kambe, Shinsaku  ; Yasuoka, Hiroshi; Homma, Yoshiya*; Aoki, Dai*; Shiokawa, Yoshinobu*

The first $$^{139}$$La-NMR measurement has been carried out on a La dilute system of PrPb$$_3$$. We have succeeded to detect $$^{139}$$La-NMR signal on a powder sample of Pr$$_{0.97}$$La$$_{0.03}$$Pb$$_3$$ and extracted the temperature dependence of the Knight shift $$^{139}K(T)$$ in a temperature range between 1.5 and 220 K. $$^{139}K(T)$$ has been found to maintain a linear relation with the bulk-susceptibility $$chi(T)^{rm bulk}$$ in wide temperature range, except for a small deviation in the temperature region below 6 K. The slopes of the $$^{139}K$$ vs $$chi^{rm bulk}$$ plots yield for the hyperfine coupling constants $$A_{rm hf}$$ the value 375 Oe/$$mu _B$$. From the NMR results, we discuss the effect of the La substitutions on microscopic magnetic properties of PrPb$$_3$$.

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Category:Thermodynamics

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