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Inelastic neutron scattering study of phonon anomalies in La$$_{1.5}$$Sr$$_{0.5}$$NiO$$_{4}$$

La$$_{1.5}$$Sr$$_{0.5}$$NiO$$_{4}$$におけるフォノン異常の非弾性中性子散乱による研究

梶本 亮一  ; 藤田 全基*; 中島 健次  ; 池内 和彦*; 稲村 泰弘  ; 中村 充孝   ; 今里 拓朗*

Kajimoto, Ryoichi; Fujita, Masaki*; Nakajima, Kenji; Ikeuchi, Kazuhiko*; Inamura, Yasuhiro; Nakamura, Mitsutaka; Imasato, Takuro*

We studied spin and lattice dynamics in this highly hole-doped region of $$R_{2-x}$$Sr$$_{x}$$NiO$$_{4}$$ to investigate how they are modified compared with the lower hole-concentration region. We performed inelastic neutron scattering experiments on La$$_{1.5}$$Sr$$_{0.5}$$NiO$$_{4}$$ and Pr$$_{1.3}$$Sr$$_{0.7}$$NiO$$_{4}$$ on the chopper-type neutron spectrometer 4SEASONS at J-PARC. We observed magnetic excitations below $$sim$$60 meV for both compounds, which are consistent with a previous study on La$$_{1.5}$$Sr$$_{0.5}$$NiO$$_{4}$$. Furthermore, we observed softening of a phonon mode, which is similar to the one observed in a nickelate with a much lower hole concentration, La$$_{1.69}$$Sr$$_{0.31}$$NiO$$_{4}$$. We will show the details of data and discussions on the roles of holes in the presentation.

使用言語

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English

掲載資料名

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Journal of Physics; Conference Series

巻

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502

号

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1

ページ数

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p.012056_1 - 012056_5

発行年月

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2014/04

発表会議名

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1st Conference on Light and Particle Beams in Materials Science 2013 (LPBM 2013)

開催年月

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2013/08

開催都市

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Tsukuba

開催国

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Japan

キーワード

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no keyword

特許データ

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PDF

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論文URL

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https://doi.org/10.1088/1742-6596/502/1/012056

研究データの公開先DOI

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使用施設

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J-PARC物質・生命科学実験施設  

広報プレスリリース

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論文解説記事
(成果普及情報誌)

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受委託・共同研究相手機関

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Access

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- Accesses

InCites™

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パーセンタイル：53.76

分野：Materials Science, Multidisciplinary

Altmetrics

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