发表机构
Budapest University of Technology and Economics; Semilab Semiconductor Physincs Laboratory Co. Ltd.; L. V. Kirensky Institute of Physics Siberian Branch of RAS; HUN-REN–BME Condensed Matter Physics Research Group, Budapest University of Technology and Economics; Institute of Solid State Physics, TU Wien（布达佩斯技术与经济大学; Semilab半导体物理实验室有限公司; 俄罗斯科学院西伯利亚分院 L.V. 基连斯基物理研究所; 匈牙利研究与创新网络-布达佩斯技术与经济大学凝聚态物理研究组; 维也纳工业大学固体物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过磁光光谱揭示了SmFe3(BO3)4中反铁磁序诱导的近红外磁线性二色性与非互易方向二色性，实现了磁场调控并推导了偏振选择定则，为探测反铁磁序面内取向提供了新途径。
AI 中文摘要
我们通过偏振分辨的磁光光谱研究了反铁磁（AFM）序对SmFe3(BO3)4近红外光学响应的影响。在奈尔温度以下，我们在Sm3+的4f-4f跃迁处观察到了显著的磁线性二色性。通过利用磁场旋转易平面AFM基态的有序参量，我们展示了线性二色性的磁场控制，并推导出了偏振选择定则。此外，我们检测到了若干4f-4f跃迁的非互易方向二色性。当面内磁场垂直于其中一个二重旋转轴时，在对称允许的环形几何结构中出现了非互易吸收。这些结果表明，对于表现出非互易吸收的跃迁，电偶极和磁偶极激发之间存在强烈的干涉。观察到的光学各向异性为探测AFM序的面内取向提供了一条有前景的途径，使得对稀土铁硼酸盐中AFM有序参量的成像和时间分辨研究成为可能。
英文摘要
We investigated the influence of antiferromagnetic (AFM) order on the near-infrared optical re- sponse of SmFe3(BO3)4 by polarization-resolved, magneto-optical spectroscopy. Below the Néel temperature, we observed pronounced magnetic linear dichroism at the 4f -4f transitions of Sm3+. By rotating the order parameter of the easy-plane AFM ground state using magnetic fields, we demonstrated the magnetic field control of linear dichroism, and deduced polarization selection rules. In addition, we detected non-reciprocal directional dichroism for several 4f -4f transitions. The non-reciprocal absorption appears in the symmetry-allowed toroidal geometry when the in- plane magnetic field is normal to one of the two-fold rotation axes. These results indicate a strong interference between electric- and magnetic-dipole excitations for transitions showing non-reciprocal absorption. The observed optical anisotropies provide a promising path to detect the in-plane orien- tation of the AFM order, enabling imaging and time-resolved studies of the AFM order parameter in rare-earth ferroborates.
