Magnetism induced by interlayer electrons in the quasi-two-dimensional electride Y2C: Inelastic neutron scattering study
Magnetism induced by interlayer electrons in the quasi-two-dimensional electride Y2C: Inelastic neutron scattering study
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准二维电子化合物Y2C中层间电子诱导的磁性：非弹性中子散射研究
DOI：
10.1103/physrevb.102.224406
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发表时间：
2020
影响因子：
3.7
通讯作者：
Hosono Hideo
中科院分区：
文献类型：
--
作者：
Tamatsukuri Hiromu;Murakami Youichi;Kuramoto Yoshio;Sagayama Hajime;Matsuura Masato;Kawakita Yukinobu;Matsuishi Satoru;Washio Yasuhito;Inoshita Takeshi;Hamada Noriaki;Hosono Hideo
用非弹性中子散射方法发现了层状晶体中的磁激发。我们已经观察到弱，但明确的磁散射波数周围，但没有磁秩序的最低温度测量（7 K）。推导出的动力学极化率的虚部可以很好地用每个动量的能量洛伦兹函数来描述。洛伦兹函数的宽度与K成正比。我们还发现，随着Y原子的增大，其磁形状因子的衰减速度比单个Y原子中电子的衰减速度快，这表明Y原子中的磁矩更大。这些结果提供了实验证据，巡游磁性inoriginates从阴离子电子驻留在夹层。所报道的磁化率的居里-外斯行为归因于自旋涨落的模式耦合效应。
Magnetic excitations in layered electridehave been found by inelastic neutron scattering. We have observed weak but clear magnetic scattering around the wave number, but no magnetic order down to the lowest temperature measured (7 K). The imaginary part of the dynamical susceptibility deduced is well described by the Lorentz function of energyfor each momentum. The widthof the Lorentzian is proportional towithatK. We have also found that with increasingthe magnetic form factor decays faster than that of aelectron in a single Y atom, which indicates a more extended magnetic moment in. These results provide experimental evidence that the itinerant magnetism inoriginates from the anionic electrons that reside in the interlayers. The Curie-Weiss-like behavior of the magnetic susceptibility reported inis ascribed to the mode coupling effects of spin fluctuations.