Voltage Manipulation of Synthetic Antiferromagnetism in CoFeB/Ta/CoFeB Heterostructure for Spintronic Application. Issue 14 (3rd April 2022)

• Record Type: Journal Article
• Authors: Peng, Wanjun; Wang, Lei; Li, Yaojin; Du, Yujing; He, Zhexi; Wang, Chenying; Zhao, Yifan; Jiang, Zhuangde; Zhou, Ziyao; Liu, Ming
• Is Part Of: Advanced materials interfaces. Volume 9:Issue 14(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-04-03
• Subjects: antiferromagnetic spintronics -- E‐field control -- interlayer exchange coupling -- magnetoelectric coupling -- RKKY; Materials science -- Periodicals; 620.11
• DOI: 10.1002/admi.202200007
• Languages: English
• ISSNs: 2196-7350

Abstract

Abstract: The synthetic antiferromagnets (SAFs) with inserted heavy metal tantalum (Ta) are attracting an increasing interest due to the relatively large spin Hall angles, resulting in a much lower driven current for low‐power consumption, and the conduciveness to high magnetoresistance, showing more suitability for an application. Here, stable and reversible switching behavior is experimentally realized between antiferromagnetic (AFM) coupling and ferromagnetic (FM) coupling in Co40 Fe40 B20 /Ta/Co40 Fe40 B20 /(011) Pb(Mg1/3 Nb2/3 )O3 ‐PbTiO3 (PMN‐PT) multiferroic heterostructures after applying an external voltage, proved by vibrating sample magnetometer (VSM) and ferromagnetic resonance (FMR) measurements. The indirect interaction shows no periodical oscillation with the layer thicknesses variation of FM layer or nonmagnetic (NM) layer experimentally, which is consistent with the previous reports in theoretical calculation. This work is instructive and guiding for a better understanding of SAFs and realizing the next generation of AFM spintronic devices. Abstract : A stable and reversible switching behavior between antiferromagnetic coupling and ferromagnetic coupling in CoFeB/Ta/CoFeB/(011) PMN‐PT multiferroic heterostructures is realized after applying an external voltage. And it is proved experimentally that the interlayer exchange coupling via Ta shows no periodical oscillation with the layer thicknesses variation of ferromagnetic layer or nonmagnetic layer in the synthetic antiferromagnets.