Neutron Brillouin Scattering Experiments with Pulsed Neutrons on High Resolution Chopper Spectrometer HRC
Neutron Brillouin Scattering Experiments with Pulsed Neutrons on High Resolution Chopper Spectrometer HRC
复制标题
高分辨率斩波谱仪 HRC 上的脉冲中子中子布里渊散射实验
DOI：
10.1088/1742-6596/502/1/012043
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Y. Endoh
中科院分区：
文献类型：
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作者：
S. Itoh;T. Yokoo;D. Kawana;Y. Kaneko;Y. Tokura;M. Fujita;K. Yoshida;K. Saito;N. Inami;Y. Takeichi;K. Ono;Y. Endoh
我们改进了安装在J-PARC的MLF上的高分辨率斩波谱仪（HRC），以进行中子布里渊散射（NBS）实验，并成功地证明了这种方法的可行性。在La0.8Sr0.2MnO3中观察到了无隙自旋波激发，这与以前的单晶结果一致，另一方面，在SrRuO 3中发现了大的铁磁自旋波能隙.永磁体Nd 2 Fe 14 B中的自旋波峰出现在以前用单晶测定的色散曲线上。液体D2 O中的激发，即所谓的快声，与以前的非弹性中子散射实验符合得很好，色散曲线扩展到低Q区。
We improved the High Resolution Chopper Spectrometer (HRC), which is installed at MLF in J-PARC, in order to perform neutron Brillouin scattering (NBS) experiments, and successfully demonstrated a feasibility of this method. Gapless spin-wave excitations were observed in La 0.8 Sr 0.2 MnO 3, which were in good agreement with previous results using single crystals, on the other hand, a large energy gap in the ferromagnetic spin waves was found in SrRuO 3. Spin-wave peaks in a permanent magnet Nd 2 Fe 14 B were on the dispersion curve determined previously using a single crystal. Excitations, so-called fast sound, in liquid D 2 O were in a good agreement with previous inelastic neutron scattering experiments and the dispersion curve were extended to the lower Q region.