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Journal Articles

Critical slowing-down and field-dependent paramagnetic fluctuations in the skyrmion host EuPtSi; $$mu$$SR and NMR studies

Higa, Nonoka*; Ito, Takashi; Yogi, Mamoru*; Hattori, Taisuke; Sakai, Hironori; Kambe, Shinsaku; Guguchia, Z.*; Higemoto, Wataru; Nakashima, Miho*; Homma, Yoshiya*; et al.

Physical Review B, 104(4), p.045145_1 - 045145_7, 2021/07

https://doi.org/10.1103/PhysRevB.104.045145
 Times Cited Count：0 Percentile：0(Materials Science, Multidisciplinary)

Journal Articles

Magnetic fluctuation and first-order transition in trillium lattice of EuPtSi observed by $$^{151}$$Eu M$"o$ssbauer spectroscopy

Homma, Yoshiya*; Kakihana, Masashi*; Tokunaga, Yo; Yogi, Mamoru*; Nakashima, Miho*; Nakamura, Ai*; Shimizu, Yusei*; Li, D.*; Maurya, A.*; Sato, Yoshiki*; et al.

Journal of the Physical Society of Japan, 88(9), p.094702_1 - 094702_8, 2019/08

https://doi.org/10.7566/JPSJ.88.094702
 Times Cited Count：9 Percentile：59.53(Physics, Multidisciplinary)

Journal Articles

$$^{195}$$Pt-NMR study on noncentrosymmetric heavy-fermion superconductor CePt$$_3$$Si

Yogi, Mamoru*; Kitaoka, Yoshio*; Hashimoto, Shin*; Yasuda, Takashi*; Settai, Rikio*; Matsuda, Tatsuma; Haga, Yoshinori; Onuki, Yoshichika; Rogl, P.*; Bauer, E.*

Journal of Physics and Chemistry of Solids, 67(1-3), p.522 - 524, 2006/01

https://doi.org/10.1016/j.jpcs.2005.10.070
 Times Cited Count：9 Percentile：41.55(Chemistry, Multidisciplinary)

We report on magnetic and novel superconducting properties in heavy-fermion (HF) noncentrosymmetric compound CePt$$_3$$Si via the measurement of $$^{195}$$Pt nuclear spin-lattice relaxation rate 1/$$T$$$$_1$$. This compound reveals the uniform coexistence of antiferromagnetism ($$T_{rm N}$$ =2.2 K) and superconductivity ($$T_{rm c}$$ =0.75 K). CePt$$_3$$Si is the first HF superconductor that reveals a peak in 1/$$T$$$$_1$$ just below $$T_{rm c}$$ and, additionally, does not follow the $$T^3$$ law that was observed for most unconventional HF superconductors. The novel relaxation behavior found below $$T_{rm c}$$ may be relevant with a possible novel SC state being realized in the noncentrosymmetric CePt$$_3$$Si.

Journal Articles

Evidence for novel pairing state in noncentrosymmetric superconductor CePt$$_3$$Si; $$^{29}$$Si-NMR Knight shift study

Yogi, Mamoru*; Mukuda, Hidekazu*; Kitaoka, Yoshio*; Hashimoto, Shin*; Yasuda, Takashi*; Settai, Rikio*; Matsuda, Tatsuma; Haga, Yoshinori; Onuki, Yoshichika; Rogl, P.*; et al.

Journal of the Physical Society of Japan, 75(1), p.013709_1 - 013709_4, 2006/01

https://doi.org/10.1143/JPSJ.75.013709
 Times Cited Count：64 Percentile：88.17(Physics, Multidisciplinary)

We report the measurements of the $$^{29}$$Si Knight shift $$^{29}$$K$$_s$$ on the noncentrosymmetric heavy-fermion compound CePt$$_3$$Si in which antiferromagnetism (AFM) with $$T_N$$=2.2 K coexists with superconductivity (SC) with $$T_c$$=0.75 K. Its spin part $$^{29}$$K$$_s$$, which is deduced to be K$$_{sc}$$$$>$$0.11 and 0.16 at respective magnetic fields H=2.0061 and 0.8671 T,. does not decrease across the superconducting transition temperature Tc for the field along the c-axis. The temperature dependence of nuclear spin-lattice relaxation of $$^{195}$$Pt below Tc has been accounted for by a Cooper pairing model with a two-component order parameter composed of spin-singlet and spin-triplet pairing components. From this result, it is shown that the Knight-shift data are consistent with the occurrence of the two-component order parameter for CePt$$_3$$Si.

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