论文标题
超薄COO（001）膜中抗铁磁域的光学成像
Optical imaging of antiferromagnetic domains in ultrathin CoO(001) films
论文作者
论文摘要
超薄COO（001）膜中的抗磁磁（AFM）结构域是通过磁光光学显微镜对磁光光谱效应成像的。通过在Fe/COO（001）双层中的交换耦合进行旋转方向操作证实了观察到的光学对比度的磁起源。超薄单晶COO膜的排序温度的有限尺寸效应通过双重对比的厚度和温度依赖性测量揭示。发现磁光双折射效应在很大程度上取决于入射光的光子能量，并且从具有蓝光源的4.6 nm COO膜中获得了令人惊讶的大极化旋转角，直至168.5 MDEG，从而可以进一步研究外部场下AFM Ultrathin膜中AFM Ultrathin膜中AFM域的演变。
Antiferromagnetic (AFM) domains in ultrathin CoO(001) films are imaged by a wide-field optical microscopy using magneto-optical birefringence effect. The magnetic origin of observed optical contrast is confirmed by the spin orientation manipulation through exchange coupling in Fe/CoO(001) bilayer. The finite size effect of ordering temperature for ultrathin single crystal CoO film is revealed by the thickness and temperature dependent measurement of birefringence contrast. The magneto-optical birefringence effect is found to strongly depend on the photon energy of incident light, and a surprising large polarization rotation angle up to 168.5 mdeg is obtained from a 4.6 nm CoO film with a blue light source, making it possible to further investigate the evolution of AFM domains in AFM ultrathin film under external field.
