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重い電子系反強磁性体CeRh$$_2$$Si$$_2$$における磁気揺らぎ異方性,2

Anisotropic spin fluctuations in heavy fermion antiferromagnet CeRh$$_2$$Si$$_2$$, 2

酒井 宏典   ; 徳永 陽  ; 神戸 振作  ; 松本 裕司*; 芳賀 芳範   

Sakai, Hironori; Tokunaga, Yo; Kambe, Shinsaku; Matsumoto, Yuji*; Haga, Yoshinori

重い電子系反強磁性体CeRh$$_2$$Si$$_2$$は、常圧で約36Kで反強磁性秩序を示し、約1GPaの圧力で反強磁性が抑制され、超伝導が誘起されることが知られている。前回に引き続き、単結晶を用いて$$^{29}$$Si核NMR実験を行い、磁気揺らぎ異方性の圧力依存性を調べている。講演では、最新の実験結果を報告し議論したい。

Heavy fermion antiferromagnet CeRh$$_2$$Si$$_2$$ exhibits antiferromagnetic transition at $$T_{rm N}sim 36$$ K, which is suppressed by applying pressure. It is known as a pressure induced superconductor around 1 GPa, where the $$T_{rm N}$$ becomes close to zero. As followed by the previous presentation, we will report the progress of our $$^{29}$$Si NMR experiments which tell how the antiferromagnetic spin fluctuations develop in this system under pressures.

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