JAEA
  • help
  • PC | SP
  • JP | EN
          
検索対象：     
報告書番号：
※ 半角英数字
 年 ～ 
 年
全てクリア
検索結果：　2 件中 1件目～2件目を表示
  • 1

発表形式

Initialising ...

選択項目を絞り込む

掲載資料名

Initialising ...

発表会議名

Initialising ...

筆頭著者名

Initialising ...

キーワード

Initialising ...

発表言語

Initialising ...

発行年

Initialising ...

開催年

Initialising ...

選択した検索結果をダウンロード

論文

Configuration and dynamics of hydride ions in the nitride-hydride catalyst Ca$$_{3}$$CrN$$_{3}$$H

Fine, L.*; Lav$'{e}$n, R.*; Wei, Z.*; 津森 竜也*; 陰山 洋*; 梶本 亮一; Jimen$'{e}$z-Ruiz, M.*; Koza, M. M.*; Karlsson, M.*

Chemistry of Materials, 37(1), p.489 - 496, 2024/12

https://doi.org/10.1021/acs.chemmater.4c02897
 被引用回数：2 パーセンタイル：23.26

We report results on the configuration and vibrational dynamics of hydride-ions (H$$^{-}$$) in the novel nitridehydride catalyst Ca$$_{3}$$CrN$$_{3}$$H, by means of variable temperature inelastic neutron scattering (INS) experiments, harmonic phonon calculations, and machine-learning molecular dynamics (MLMD) calculations. The combined analyses of experimental and theoretical data show that the vibrational dynamics of H$$^{-}$$ are manifested as a broad, asymmetric vibrational band between 80 and 130 meV. Crucially, these modes are polarized along the crystallographic $$c$$ axis, and their dispersive character reveals significant interactions between neighbouring H$$^{-}$$ in the material. We find that most H$$^{-}$$ are surrounded by two other H$$^{-}$$ and that the H$$^{-}$$ sites of the studied sample have an occupancy of at least 95%. We argue that this high H$$^{-}$$ occupancy may be related to the material's high efficiency as a catalyst for ammonia synthesis.

論文

Quantum critical spin-liquid-like behavior in the $$S$$ = $$frac{1}{2}$$ quasikagome-lattice compound CeRh$$_{1-x}$$Pd$$_x$$Sn investigated using muon spin relaxation and neutron scattering

Tripathi, R.*; Adroja, D. T.*; Ritter, C.*; Sharma, S.*; Yang, C.*; Hillier, A. D.*; Koza, M. M.*; Demmel, F.*; Sundaresan, A.*; Langridge, S.*; et al.

Physical Review B, 106(6), p.064436_1 - 064436_17, 2022/08

https://doi.org/10.1103/PhysRevB.106.064436
 被引用回数：10 パーセンタイル：58.35(Materials Science, Multidisciplinary)

We present the results of muon spin relaxation ($$mu$$SR) and neutron scattering measurements on the Ce-based quasikagome lattice CeRh$$_{1-x}$$Pd$$_x$$Sn ($$x$$ = 0.1 to 0.75). Our $$mu$$SR results reveal the absence of both static long-range magnetic order and spin freezing down to 0.05 K in the $$x$$ = 0.1 sample, which is consistent with neutron scattering results. The weak temperature-dependent plateaus of the dynamic spin fluctuations below 0.2 K in zero field together with its longitudinal-field (LF) dependence indicate the presence of dynamic spin fluctuations persisting even at 0.05 K without static magnetic order. We argue that such a behavior for $$x$$ = 0.1 can be attributed to a metallic spin-liquid-like ground state near the quantum critical point in the frustrated Kondo lattice. The LF-$$mu$$SR study suggests that the out of kagome plane spin fluctuations are responsible for the spin-liquid behavior.

2 件中 1件目～2件目を表示
  • 1