Dwivedi G D, Wu C-M, Chen Bo-Yu, Lin S T, Qiu W-Z, Sun S J, Xu Guangyong, Lynn J W, Chiou J W, Lee C-H, Li W-H, Yano S, Chou H
Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan, 80424, R.O.C.
National Synchrotron Radiation Research Center, Hsinchu, Taiwan, 30076, R.O.C. and Australian Nuclear Science and Technology Organization, New South Wales, Australia.
Phys Rev B. 2020;101. doi: 10.1103/PhysRevB.101.054403.
In this study, the inelastic neutron scattering probe of SIKA in ANSTO is employed to investigate the magnon dispersion curve in ferromagnetic SrRuO single crystal epitaxial films and to better understand the underlying mechanisms. This report presents the successful measurement of a magnon peak from the SrRuO films which contained an amount of material of only 0.9 mg. We reveal one significant magnon dispersion curve along [002] following the quadratic relation, which shows a magnon gap of 0.32 meV. We have discussed several possible mechanisms, such as the higher symmetry structure and the impurity levels, which may contribute to this smaller gap.
在本研究中，利用澳大利亚核科学与技术组织（ANSTO）的SIKA非弹性中子散射探测器来研究铁磁SrRuO单晶外延薄膜中的磁振子色散曲线，并更好地理解其潜在机制。本报告展示了对仅含0.9毫克材料的SrRuO薄膜磁振子峰的成功测量。我们揭示了沿[002]方向遵循二次关系的一条重要磁振子色散曲线，其磁振子能隙为0.32毫电子伏特。我们讨论了几种可能的机制，如更高对称性结构和杂质能级，它们可能导致了这个较小的能隙。
