Magneto-optical properties of Pt/TbCo heterostructure films.

Magnetic film with a heavy metal layer shows strong interfacial interaction of spin-orbit. Spin-orbit interaction (SOI) is one of the key technologies for spintronics and its applications. It is important to reveal the SOI [1]. On the other hand, it is known that magneto-optical Kerr effect is a useful method to detect interfacial information, especially using interference [2], [3]. There are many reports about magneto-optical Kerr effect in a rear earth transition metal (RE-TM) film with a noble metal layer such as Pt, Pd, etc [4], [5]. However, there are few reports about discussion on the SOI. In this paper, we measured magneto-optical Kerr spectrums of Pt/TbCo heterostructure films, and discuss about contribution of the SOI.