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

doi:10.1063/1.5129489

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^*

^*Corresponding author for this work

Nanjing University
University of York
Zhejiang Hikstor Technology Company
Royal Holloway University of London
University of Twente
CAS - Institute of Physics

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

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, 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.

Original language	English
Article number	063903
Journal	Journal of Applied Physics
Volume	127
Issue number	6
DOIs	https://doi.org/10.1063/1.5129489
State	Published - 14 Feb 2020
Externally published	Yes

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@article{e34fc2bf870049cc93ccdecc0df95eef,

title = "Element-specific spin and orbital moments and perpendicular magnetic anisotropy in Ta/CoFeB/MgO structures",

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, 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.",

author = "Yu Yan and Xianyang Lu and Bo Liu and Xiaoqian Zhang and Xiangyu Zheng and Hao Meng and Wenqing Liu and Junlin Wang and Will, \{Iain G.\} and Jing Wu and Wong, \{Ping Kwan Johnny\} and Jianwang Cai and Jun Du and Rong Zhang and Yongbing Xu",

note = "Publisher Copyright: {\textcopyright} 2020 Author(s).",

year = "2020",

month = feb,

day = "14",

doi = "10.1063/1.5129489",

language = "英语",

volume = "127",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "6",

}

TY - JOUR

T1 - Element-specific spin and orbital moments and perpendicular magnetic anisotropy in Ta/CoFeB/MgO structures

AU - Yan, Yu

AU - Lu, Xianyang

AU - Liu, Bo

AU - Zhang, Xiaoqian

AU - Zheng, Xiangyu

AU - Meng, Hao

AU - Liu, Wenqing

AU - Wang, Junlin

AU - Will, Iain G.

AU - Wu, Jing

AU - Wong, Ping Kwan Johnny

AU - Cai, Jianwang

AU - Du, Jun

AU - Zhang, Rong

AU - Xu, Yongbing

PY - 2020/2/14

Y1 - 2020/2/14

N2 - 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, 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.

AB - 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, 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.

UR - https://www.scopus.com/pages/publications/85079372795

U2 - 10.1063/1.5129489

DO - 10.1063/1.5129489

M3 - 文章

AN - SCOPUS:85079372795

SN - 0021-8979

VL - 127

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 6

M1 - 063903

ER -

Element-specific spin and orbital moments and perpendicular magnetic anisotropy in Ta/CoFeB/MgO structures

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