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Magnetization dynamics in the normal and superconducting phases of UPd$$_2$$Al$$_3$$, 1; Surveys in reciprocal space using neutron inelastic scattering

UPd$$_2$$Al$$_3$$の常伝導・超伝導状態における磁気応答,1; 中性子非弾性散乱実験による逆格子空間の研究

Hiess, A.*; Bernhoeft, N.*; 目時 直人; Lander, G.*; Roessli, B.*; 佐藤 憲昭*; 阿曽 尚文*; 芳賀 芳範; 小池 良浩*; 小松原 武美*; 大貫 惇睦*

Hiess, A.*; Bernhoeft, N.*; Metoki, Naoto; Lander, G.*; Roessli, B.*; Sato, Noriaki*; Aso, Naofumi*; Haga, Yoshinori; Koike, Yoshihiro*; Komatsubara, Takemi*; Onuki, Yoshichika*

本論文はUPd$$_2$$Al$$_3$$の単結晶試料を用いて行った中性子非弾性散乱実験から結果を示す。私たちは幅広いエネルギー範囲に及ぶ中性子非弾性散乱実験の結果からわかった動的磁性の波数-エネルギー依存性を分析し、2つのグループにより独立に発表されたデータと比較する。この研究は反強磁性と超伝導性の共存状態に対してユニークな洞察をもたらす。

This topical review presents results from neutron inelastic scattering experiments on single crystals of UPd$$_2$$Al$$_3$$. We present a detailed and complete characterization of the wave vector- and energy-dependent magnetization dynamics in UPd$$_2$$Al$$_3$$ as measured by neutron inelastic scattering primarily in the form of extensive surveys in energy-momentum space under a wide range of experimental conditions, and put our observations in context with data that has been published previously by two independent groups. This study yields unique insight into the low-temperature ground state, which exhibits a microscopic coexistence of antiferromagnetism and superconductivity, makingUPd$$_2$$Al$$_3$$ one of the most accessible heavy-fermion superconductors that can be fully characterized by neutron spectroscopy.

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