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Journal Articles

Non-Fermi liquid behavior in nonlinear susceptibility in Pr$$_{0.05}$$La$$_{0.95}$$Pb$$_3$$

Kawae, Tatsuya*; Koga, Mikito*; Sato, Yoshiaki*; Makiyama, Shun*; Inagaki, Yuji*; Tateiwa, Naoyuki; Fujiwara, Tetsuya*; Suzuki, Hiroyuki*; Kitai, Tetsuo*

JPS Conference Proceedings (Internet), 3, p.012030_1 - 012030_6, 2014/06

https://doi.org/10.7566/JPSCP.3.012030

We measure the temperature dependence of the nonlinear susceptibility $${chi}_3$$ in Pr$$_{0.05}$$La$$_{0.95}$$Pb$$_3$$. $${chi}_3$$ reflects the fluctuation of the quadrupolar moments. Non-Fermi liquid behavior of $${chi}_3$$ with $$lnT$$-dependence is detected below 2.5 K, suggesting that the screening of the quadrupolar moments is responsible for the anomalous behavior at low temperatures. These results provide a direct evidence for the crucial role of the quadrupolar moments in Pr$$_{0.05}$$La$$_{0.95}$$Pb$$_3$$.

Journal Articles

Nonlinear susceptibility measurement for quadrupolar response in a dilute $${Gamma}_3$$ non-Kramers doublet system Pr$$_{0.05}$$La$$_{0.95}$$Pb$$_{3}$$

Kawae, Tatsuya*; Koga, Mikito*; Sato, Yoshiaki*; Makiyama, Shun*; Inagaki, Yuji*; Tateiwa, Naoyuki; Fujiwara, Tetsuya*; Suzuki, Hiroyuki*; Kitai, Tetsuo*

Journal of the Physical Society of Japan, 82(7), p.073701_1 - 073701_4, 2013/07

https://doi.org/10.7566/JPSJ.82.073701
 Times Cited Count：11 Percentile：56.18(Physics, Multidisciplinary)

We measure the temperature dependence of the nonlinear susceptibility $${chi}_3$$, which reflects the fluctuation of quadrupolar moments in, Pr$$_{0.05}$$La$$_{0.95}$$Pb$$_{3}$$ which a $${Gamma}_3$$ non-Kramers doublet in the crystal-electric-field ground state to provide evidence of the quadrupolar Kondo effect. Non-Fermi liquid behavior of $${chi}_3$$ with a - ln $$T$$ dependence is detected in the [100] and [110] directions below $$T$$ $${approx}$$ 2.5 K, suggesting the screening of quadrupolar moments. In contrast, $${chi}_3$$ in the [111] direction becomes constant below $$T$$ $${approx}$$ 3 K. The observed features indicate that a low-lying $${Gamma}_3$$ doublet plays a crucial role in the anomalous properties of Pr$$_x$$La$$_{1-x}$$Pb$$_3$$.

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