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I06-Nanoscience (XPEEM) I10-Beamline for Advanced Dichroism - scattering	Element-specific spin and orbital moments and perpendicular magnetic anisotropy in Ta/CoFeB/MgO structures Yu Yan , Xianyang Lu , Bo Liu , Xiaoqian Zhang , Xiangyu Zheng , Hao Meng , Wenqing Liu , Junlin Wang , Iain G. Will , Jing Wu , Ping Kwan Johnny Wong , Jianwang Cai , Jun Du , Rong Zhang , Yongbing Xu Journal Of Applied Physics 127 DOI: 10.1063/1.5129489 Diamond Proposal Number(s): [16538] Show Abstract ▼ Abstract: Perpendicular magnetic anisotropy (PMA) in the Ta/CoFeB/MgO system has been studied using x-ray magnetic circular dichroism and vibrating sample magnetometry. The ratios of the orbital to spin magnetic moments of Co atoms in the Ta/CoFeB/MgO structures with PMA have been found to be enhanced by 100%, compared with the Ta/CoFeB/Ta structure without PMA. The orbital moments of Co are as large as 0.30 μ B 0.30μB , more than half of their spin moments in the perpendicularly magnetized Ta/CoFeB/MgO structures. The results indicate that the PMA observed in the CoFeB/MgO structures is related to the increased spin–orbital coupling of the Co atoms. This work offers experimental evidence of the correlation between PMA and the element-specific spin and orbital moments in the Ta/CoFeB/MgO systems.	Feb 2020

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