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http://dx.doi.org/10.1016/j.cap.2018.07.022

Thickness-dependent magnetic domain structures of Co ultra-thin film investigated by scanning transmission X-ray microscopy  

Yoon, Ji-Soo (Korea Research Institute of Standards and Science)
Kim, Namdong (Pohang Accelerator Laboratory, POSTECH)
Moon, Kyoung-Woong (Korea Research Institute of Standards and Science)
Lee, Joo In (Korea Research Institute of Standards and Science)
Kim, Jae-Sung (Department of Physics, Sook-Myung Women's University)
Shin, Hyun-Joon (Pohang Accelerator Laboratory, POSTECH)
Kim, Wondong (Korea Research Institute of Standards and Science)
Publication Information
Current Applied Physics / v.18, no.11, 2018 , pp. 1185-1189 More about this Journal
Abstract
Thickness-dependent magnetic domain structure of ultrathin Co wedge films (0.3 nm-1.0 nm) sandwiched by Pt layers was investigated by scanning transmission x-ray microscopy (STXM) employing X-ray magnetic circular dichroism (XMCD), utilizing elliptically polarized soft x-rays and electromagnetic fields, with a spatial resolution of 50 nm. The magnetic domain images measured at the Co $L_3$ edge showed the evolution of the magnetic domain structures from maze-like form to the bubble-like form as the perpendicular magnetic field was applied. The asymmetric domain expansion of a 500 nm-scale bubble domain was also measured when the in-plane and perpendicular external magnetic field were applied simultaneously.
Keywords
Scanning transmission X-ray microscopy; Co ultra thin film; X-ray magnetic circular dichrosim; Magnetic domain imaging;
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