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Report No.

$$mu$$SR studies on PrRh$$_2$$Zn$$_{20}$$

Higemoto, Wataru  ; Ito, Takashi   ; Nagasawa, Naohiro*; Onimaru, Takahiro*; Takabatake, Toshiro*

In caged structural compound PrRh$$_2$$Zn$$_{20}$$, superconductivity and other unknown phase transition occur at the same temperature 0.06K. This phase transition is speculated as quadrupole phase transition. However, no any microscopic study is carried out up to now and detail of the phase transition is not known at all. We have studied quadrupole ordering and superconductivity in PrRh$$_2$$Zn$$_{20}$$ by using muon spin relaxation method at J-PARC muon science facility. As a result, we have not observed any significant change of the signal above and below phase transition temperature. This fact indicate the no magnetic phase transition occur and support the quadrupole phase transition. In addition, no trace of an unconventional superconductivity was detected in our measurements. In the presentation, we will mention detail of the measurements.



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