JOPSS - Search Results

Journal Articles

Spiral spin cluster in the hyperkagome antiferromagnet Mn $_{3}$ RhSi

Shamoto, Shinichi; Yamauchi, Hiroki; Iida, Kazuki*; Ikeuchi, Kazuhiko*; Hall, A. E.*; Chen, Y.-S.*; Lee, M. K.*; Balakrishnan, G.*; Chang, L.-J.*

Communications Physics (Internet), 6, p.248_1 - 248_6, 2023/09

https://doi.org/10.1038/s42005-023-01363-1

Times Cited Count：1 Percentile：0(Physics, Multidisciplinary)

We show that the local spin correlation order has a spiral structure by neutron scattering measurement of a Mn $_{3}$ RhSi single crystal. The possible origins of the magnetic cluster formation are discussed in terms of the Lifshitz invariant and the Griffiths phase, and compared with the room-temperature skyrmion phase of Co $_{7}$ Zn $_{7}$ Mn $_{6}$ and non-Fermi liquid behavior of -Mn.

Journal Articles

Spin-flop phase in a honeycomb antiferromagnet Mn $_{0.84}$ Mg $_{0.16}$ TiO $_{3}$

Shamoto, Shinichi; Yamauchi, Hiroki; Ikeuchi, Kazuhiko*; Lee, M. K.*; Chang, L.-J.*; Garlea, V. O.*; Hwang, I. Y.*; Lee, K. H.*; Chung, J.-H.*

Journal of the Physical Society of Japan, 90(9), p.093703_1 - 093703_4, 2021/09

https://doi.org/10.7566/JPSJ.90.093703

Times Cited Count：0 Percentile：0(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Spin wave excitations in honeycomb antiferromagnet MnTiO $_{3}$

Hwang, I. Y.*; Lee, K. H.*; Chung, J.-H.*; Ikeuchi, Kazuhiko*; Garlea, V. O.*; Yamauchi, Hiroki; Akatsu, Mitsuhiro*; Shamoto, Shinichi

Journal of the Physical Society of Japan, 90(6), p.064708_1 - 064708_6, 2021/06

https://doi.org/10.7566/JPSJ.90.064708

Times Cited Count：2 Percentile：30.35(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Broken C $_{4}$ symmetry in the tetragonal state of uniaxial strained BaCo $_{0.9}$ Ni $_{0.1}$ S $_{1.9}$

Shamoto, Shinichi; Yamauchi, Hiroki; Ikeuchi, Kazuhiko*; Kajimoto, Ryoichi; Ieda, Junichi

Physical Review Research (Internet), 3(1), p.013169_1 - 013169_9, 2021/02

https://doi.org/10.1103/PhysRevResearch.3.013169

Journal Articles

The -electron state of the heavy fermion superconductor NpPdAl and the isostructural family

Metoki, Naoto; Aczel, A. A.*; Aoki, Dai*; Chi, S.*; Fernandez-Baca, J. A.*; Griveau, J.-C.*; Hagihara, Masato*; Hong, T.*; Haga, Yoshinori; Ikeuchi, Kazuhiko*; et al.

JPS Conference Proceedings (Internet), 30, p.011123_1 - 011123_6, 2020/03

https://doi.org/10.7566/JPSCP.30.011123

Rare earths (4) and actinides (5) provide variety of interesting states realized with competing interactions between the increasing number of electrons. Since crystal field splitting of many-body electron system is smaller than the bandwidth, (1) high resolution experiments are needed, (2) essentially no clear spectrum with well defined peaks is expected in itinerant Ce and U compounds, and (3) Np and Pu is strictly regulated. Therefore, systematic research on magnetic excitations by neutron scattering experiments of localized compounds and rare earth iso-structural reference is useful. We describe the electron states of heavy electron compounds NpPdAl and actinide and rare earth based iso-structural family.

Journal Articles

Neutron inelastic scattering study of the -electron states in NdPdAl

Metoki, Naoto; Yamauchi, Hiroki; Suzuki, Hiroyuki*; Kitazawa, Hideaki*; Kamazawa, Kazuya*; Ikeuchi, Kazuhiko*; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro

Journal of the Physical Society of Japan, 87(8), p.084708_1 - 084708_7, 2018/08

https://doi.org/10.7566/JPSJ.87.084708

Times Cited Count：6 Percentile：46.54(Physics, Multidisciplinary)

Inelastic neutron scattering experiments were carried out in order to study the -electron states of NdPdAlThe CEF levels at 0K, 35.4K, 88.3K, 101.5K, and 198.8K were clarified from the excitation spectra. The ground state contains the orbital with as a main component due to a large negative B $_{20}=-1.4$ K, which is the origin of the strong uniaxial anisotropy. The estimated magnetic moment, the calculated susceptibility, magnetization curve, and specific heat are in good agreement with the experimental data. The existence of a common charge distribution with CePdAl and PrPdAl. Indicates that a localized character is important even in actinide-based iso-structural compounds as actually observed in UPdAl and also NpPdAl, in which the valence crossover plays important role for the heavy fermion superconductivity.

Journal Articles

Phonons of Fe-based superconductor Ca $_{10}$ PtAs(Fe $_{1-x}$ PtAs) $_{10}$

Ikeuchi, Kazuhiko*; Kobayashi, Yoshiaki*; Suzukia, Kazunori*; Ito, Masayuki*; Kajimoto, Ryoichi; Bourges, P.*; Christianson, A. D.*; Nakamura, Hiroki; Machida, Masahiko; Sato, Masatoshi*

Journal of Physics; Condensed Matter, 27(46), p.465701_1 - 465701_7, 2015/11

https://doi.org/10.1088/0953-8984/27/46/465701

Times Cited Count：1 Percentile：4.82(Physics, Condensed Matter)

We report the results of inelastic neutron scattering measurements on particular phonons of a superconducting (SC) Ca $_{10}$ PtAs(Fe $_{1-x}$ PtAs) $_{10}$ with the onset transition temperature K to investigate mainly what roles orbital fluctuation plays in Cooper pairing, where we observed a slight softening of the in-plane transverse acoustic mode corresponding to the elastic constant $C_{66}$ . This softening starts at temperature well above the SC , as decreases. An anomalously strong change of the scattering intensity of in-plane optical modes was observed at the M point of the pseudo tetragonal reciprocal space in the range of 35 40 meV with decreasing from far above . Because this region mainly corresponds to the motion of Fe and As atoms in the FeAs planes, the finding presents information on the coupling between the orbital fluctuation of Fe electrons and the lattice system, useful for studying the possible roles of orbital fluctuation in the pairing mechanism and/or the appearance of the so-called nematic phase.

Oral presentation

Study on flow-induced-vibration evaluation of large-diameter pipings in a sodium-cooled fast reactor, 14; Examination of inlet turbulent intensity by LDV measurement in a 1/10 scale model

Iwamoto, Yukiharu*; Kondo, Manabu*; Ikeuchi, Hiroki*; Yasuda, Kazunori*; Sogo, Motosuke*; Tanaka, Masaaki; Yamano, Hidemasa

no journal, ,

To clarify the effect of a straight pipe length connecting to the upstream on the elbow flow, the experiment was performed to measure the velocity distribution of the flow with a buffer tank in the upstream from the elbow. The measured data were compared with the previous data in the upstream condition with a fully developed flow.

Oral presentation

-electron states in RPdAl (R: Pr, Nd)

Metoki, Naoto; Yamauchi, Hiroki; Kitazawa, Hideaki*; Suzuki, Hiroyuki*; Hagihara, Masato*; Masuda, Takatsugu*; Matsuda, Masaaki*; Aczel, A. A.*; Songxue, C.*; Hong, T.*; et al.

no journal, ,

In order to elucidate the 5-electron states in the heavy electron superconductor NpPdAl, neutron scattering experiments of the rare earth based iso-structural family have been carried out. The observed crystal field excitations of PrPdAl and NdPdAl were analyzed via the crystal field Hamiltonian with tetragonal symmetry, diagonalized analytically. The experimentally obtained crystal field parameters $A_{lm}$ were very similar in CePdAl, PrPdAl, and NdPdAl, indicating a common effective charge potential in this series. We succeeded to clarify the 5 electron states of NpPdAl and UPdAl in comparison with these results.

Oral presentation

Broken C $_{4}$ symmetry in a tetragonal phase of BaCo $_{0.9}$ Ni $_{0.1}$ S $_{1.9}$

Shamoto, Shinichi; Yamauchi, Hiroki; Ikeuchi, Kazuhiko*; Kajimoto, Ryoichi; Ieda, Junichi

no journal, ,

no abstracts in English

Oral presentation

Coexisting short and long range orders in a hyperkagome lattice Mn $_{3}$ RhSi

Shamoto, Shinichi; Ikeuchi, Kazuhiko*; Kajimoto, Ryoichi; Yamauchi, Hiroki; Balakrishnan, G.*; Chang, L.-J.*

no journal, ,

no abstracts in English

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Spiral spin cluster in the hyperkagome antiferromagnet Mn $_{3}$ RhSi

Spin-flop phase in a honeycomb antiferromagnet Mn $_{0.84}$ Mg $_{0.16}$ TiO $_{3}$

Spin wave excitations in honeycomb antiferromagnet MnTiO $_{3}$

Broken C $_{4}$ symmetry in the tetragonal state of uniaxial strained BaCo $_{0.9}$ Ni $_{0.1}$ S $_{1.9}$

The -electron state of the heavy fermion superconductor NpPdAl and the isostructural family

Neutron inelastic scattering study of the -electron states in NdPdAl

Phonons of Fe-based superconductor Ca $_{10}$ PtAs(Fe $_{1-x}$ PtAs) $_{10}$

Study on flow-induced-vibration evaluation of large-diameter pipings in a sodium-cooled fast reactor, 14; Examination of inlet turbulent intensity by LDV measurement in a 1/10 scale model

-electron states in RPdAl (R: Pr, Nd)

Broken C $_{4}$ symmetry in a tetragonal phase of BaCo $_{0.9}$ Ni $_{0.1}$ S $_{1.9}$

Coexisting short and long range orders in a hyperkagome lattice Mn $_{3}$ RhSi