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Chin. Phys. B, 2022, Vol. 31(1): 017501    DOI: 10.1088/1674-1056/ac20cc
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Perpendicular magnetic anisotropy of Pd/Co2MnSi/NiFe2O4/Pd multilayers on F-mica substrates

Qingwang Bai(白青旺), Bin Guo(郭斌), Qin Yin(尹钦), and Shuyun Wang(王书运)
School of Physics and Electronics, Shandong Normal University, Ji'nan 250358, China
Abstract  Pd/Co2MnSi (CMS)/NiFe2O4 (NFO)/Pd multilayers were fabricated on F-mica substrate by magnetron sputtering. The best PMA performance of the multilayer structure Pd(3 nm)/CMS(5 nm)/NFO(0.8 nm)/Pd(3 nm) was obtained by adjusting the thickness of the CMS and NFO layers. F-mica substrate has a flatter surface than glass and Si/SiO2 substrate. The magnetic anisotropy energy density (Keff) of the sample deposited on F-mica substrates is 0.6711 Merg/cm3 (1 erg = 10-7 J), which is about 30% higher than that of the multilayer films deposited on glass (0.475 Merg/cm3) and Si/SiO2 (0.511 Merg/cm3) substrates, and the RHall and HC are also significantly increased. In this study, the NFO layer prepared by sputtering in the high purity Ar environment was exposed to the high purity O2 atmosphere for 5 min, which can effectively eliminate the oxygen loss and oxygen vacancy in NFO, ensuring enough Co-O orbital hybridization at the interface of CMS/NFO, and thus effectively improve the sample PMA.
Keywords:  perpendicular magnetic anisotropy      Co2MnSi      ferrimagnetics NiFe2O4  
Received:  05 August 2021      Revised:  19 August 2021      Accepted manuscript online:  25 August 2021
PACS:  75.30.Gw (Magnetic anisotropy)  
  75.50.Cc (Other ferromagnetic metals and alloys)  
  75.50.Gg (Ferrimagnetics)  
Fund: Project supported by the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2018MEM004).
Corresponding Authors:  Shuyun Wang     E-mail:  wangshuyun65@163.com

Cite this article: 

Qingwang Bai(白青旺), Bin Guo(郭斌), Qin Yin(尹钦), and Shuyun Wang(王书运) Perpendicular magnetic anisotropy of Pd/Co2MnSi/NiFe2O4/Pd multilayers on F-mica substrates 2022 Chin. Phys. B 31 017501

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