Abstract:
:To overcome the fundamental challenge of the weak natural response of antiferromagnetic materials under a magnetic field, voltage manipulation of antiferromagnetic interaction is developed to realize ultrafast, high-density, and power efficient antiferromagnetic spintronics. Here, we report a low voltage modulation of Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction via ionic liquid gating in synthetic antiferromagnetic multilayers of FeCoB/Ru/FeCoB and (Pt/Co)2/Ru/(Co/Pt)2. At room temperature, the distinct voltage control of transition between antiferromagnetic and ferromagnetic ordering is realized and up to 80% of perpendicular magnetic moments manage to switch with a small-applied voltage bias of 2.5 V. We related this ionic liquid gating-induced RKKY interaction modification to the disturbance of itinerant electrons inside synthetic antiferromagnetic heterostructure and the corresponding change of its Fermi level. Voltage tuning of RKKY interaction may enable the next generation of switchable spintronics between antiferromagnetic and ferromagnetic modes with both fundamental and practical perspectives.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Yang Q,Wang L,Zhou Z,Wang L,Zhang Y,Zhao S,Dong G,Cheng Y,Min T,Hu Z,Chen W,Xia K,Liu Mdoi
10.1038/s41467-018-03356-zsubject
Has Abstractpub_date
2018-03-07 00:00:00pages
991issue
1issn
2041-1723pii
10.1038/s41467-018-03356-zjournal_volume
9pub_type
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