journal article·2016-09-01Open access

Element specific spin and orbital moments of nanoscale CoFeB amorphous thin films on GaAs(100)

Yu Yan, Cong Lu, Hongqing Tu, Xianyang Lu, Wenqing Liu, Junlin Wang, Lei Ye, Iain Will, Balati Kuerbanjiang, Vlado K. Lazarov, Jing Wu, Johnny Wong, Biao You, Jun Du, Rong Zhang, Yongbing Xu

AIP Advances· Volume 6· Issue 9

Abstract

CoFeB amorphous films have been synthesized on GaAs(100) and studied with X-ray magnetic circular dichroism (XMCD) and transmission electron microscopy (TEM). We have found that the ratios of the orbital to spin magnetic moments of both the Co and Fe in the ultrathin amorphous film have been enhanced by more than 300% compared with those of the bulk crystalline Co and Fe, and specifically a large orbital moment of 0.56 μB from the Co atoms has been observed and at the same time the spin moment of the Co atoms remains comparable to that of the bulk hcp Co. The results indicate that the large uniaxial magnetic anisotropy (UMA) observed in the ultrathin CoFeB film on GaAs(100) is related to the enhanced spin-orbital coupling of the Co atoms in the CoFeB. This work offers experimental evidences of the correlation between the UMA and the element specific spin and orbital moments in the CoFeB amorphous film on the GaAs(100) substrate, which is of significance for spintronics applications.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Magnetic properties of thin films · Magnetic Properties and Synthesis of Ferrites · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Nanjing University 1 York-Nanjing International Center of Spintronics (YNICS), Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Material, Jiangsu Procincial Key Laboratory for Nanotechnology, School of Electronic Science and Engineering, , Nanjing 210093, China

University of York 2 Spintronics and Nanodevice laboratory, Department of Electronics, , YO10 5DD, United Kingdom

Nanjing University 3 National Laboratory of Solid State Microstructures and Department of Physics, , Nanjing 210093, China

University of York 4 Department of Physics, , YO10 5DD, United Kingdom

Chongqing University 5 College of Communication Engineering, , Chongqing 400044, China

Funding

Natural Science Foundations of Jiangsu Province · Engineering and Physical Sciences Research Council · National Natural Science Foundation of China

References (37)

Show source-provided references
1. Sci. Rep. · 2015 · 5
2. Nat. Mater. · 2010 · 9 · 72110.1038/nmat2804 ↗
3. Mat. Sci. Eng.: B · 2006 · 126 · 18010.1016/j.mseb.2005.09.031 ↗
4. Appl. Phys. Lett. · 2004 · 84 · 230710.1063/1.1689403 ↗
5. Nat. Mater. · 2007 · 6 · 81310.1038/nmat2024 ↗
6. Adv. Phy. · 2005 · 54 · 13710.1080/00018730500112000 ↗
7. Phys. Rev. B · 1998 · 58 · 89010.1103/PhysRevB.58.890 ↗
8. Appl. Phys. Lett. · 2013 · 102 · 24240510.1063/1.4811269 ↗
9. Appl. Phys. Lett. · 2012 · 100 · 17241410.1063/1.4707380 ↗
10. J. Appl. Phys. · 2008 · 104 · 8390110.1063/1.2998973 ↗
11. Appl. Phys. Lett. · 1998 · 73 · 39910.1063/1.121847 ↗
12. IEEE Trans. Magn. · 2008 · 44 · 295910.1109/TMAG.2008.2002188 ↗
13. Phys. Rev. B · 2005 · 72 · 12540410.1103/PhysRevB.72.125404 ↗
14. J. Appl. Phys. · 2000 · 87 · 545710.1063/1.373371 ↗
15. Phys. Rev. B · 1989 · 39 · 86510.1103/PhysRevB.39.865 ↗
16. Phys. Rev. B · 2000 · 62 · 116710.1103/PhysRevB.62.1167 ↗
17. Phys. Rev. B · 2011 · 83 · 21240410.1103/PhysRevB.83.212404 ↗
18. Phys. Rev. B · 1994 · 49 · 28510.1103/PhysRevB.49.285 ↗
19. Phys. Rev. B · 2007 · 76 · 21441210.1103/PhysRevB.76.214412 ↗
20. IEEE Trans. Magn. · 1987 · 23 · 226910.1109/TMAG.1987.1065651 ↗
21. J. Appl. Phys. · 1978 · 49 · 165310.1063/1.324881 ↗
22. Phys. Rev. Lett. · 2008 · 100 · 11720110.1103/PhysRevLett.100.117201 ↗
23. Phys. Rev. B · 2010 · 81 · 10040710.1103/PhysRevB.81.100407 ↗
24. Appl. Phys. Lett. · 2014 · 104 · 14240710.1063/1.4871001 ↗
25. J. Appl. Phys. · 2011 · 109 · 07E14310.1063/1.3562445 ↗
26. IEEE Trans. Magn. · 2015 · 51 · 110.1109/TMAG.2015.2441719 ↗
27. Phys. Rev. Lett. · 1995 · 75 · 287110.1103/PhysRevLett.75.2871 ↗
28. J. Appl. Phys. · 2001 · 89 · 715610.1063/1.1359473 ↗
29. AIP Adv · 2016 · 6 · 05581310.1063/1.4943157 ↗
30. J. Appl. Phys. · 2012 · 111 · 07C31110.1063/1.3676202 ↗
31. Phys. Rev. Lett. · 1995 · 75 · 15210.1103/PhysRevLett.75.152 ↗
33. Phys. Rev. B · 1993 · 48 · 64210.1103/PhysRevB.48.642 ↗
34. Sci. Rep. · 2015 · 5
35. Appl. Phys. Lett. · 2005 · 86 · 09250210.1063/1.1871344 ↗
36. J. Phys.:Condens. Matter · 2013 · 25 · 10600310.1088/0953-8984/25/10/106003 ↗
37. Appl. Phys. Lett. · 2014 · 105 · 22240910.1063/1.4903296 ↗