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本文报道了用铍过滤探测器谱仪对LaNi4.5Mn0.5Hx在三种不同氢含量时测量的中子非弹性散射谱。结果表明,Mn原子部分置换LaNi5中的Ni原子后,使M—H键增强,当x=6时,高能段的第二、三振动峰分别向高频方向位移了6meV和10meV。该结果与LaNi4.5Mn0.5Hx的平台压力(P-C-T等温线)下降的宏观热力学性能相一致。Inelastic neutron scattering spectra of LaNi4.5Mn0.5Hx (x=1.2, 4.2, 5.6) have been measured using berylium filter detector spectrometer. From the spectras, it was found that the second and the third peak of optical branches shifted 6 meV and 10 meV towarcs high frequency respectively, and the M-H bond in LaNi4.5Mn0.5Hx became stronger than that in LaNi5Hx, after the same part Ni of LaNi5 was replaced by Mn. Finally, we explained the cause of this phenomena in brief.
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