Abstract:
:Different symmetry breaking ways determine various magnetization switching modes driven by spin-orbit torques (SOT). For instance, an applied or effective field parallel to applied current is indispensable to switch magnetization with perpendicular anisotropy by SOT. Besides of this mode, here we experimentally demonstrate a distinct field-free switching mode in a T-type magnetic system with structure of MgO/CoFeB/Ta/CoFeB/MgO where a perpendicular layer with tilted easy axis was coupled to an in-plane layer with a uniaxial easy axis. Current was applied orthogonal to both easy axes and thus also normal to an in-plane effective field experienced by the perpendicular layer. Dynamic calculation shows perpendicular layer could be switched at the same time as the in-plane layer is switched. These field-free switching modes realized in the same T-type magnetic system might expedite the birth of multi-state spin memories or spin logic devices which could be operated by all electric manners.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Kong WJ,Wan CH,Wang X,Tao BS,Huang L,Fang C,Guo CY,Guang Y,Irfan M,Han XFdoi
10.1038/s41467-018-08181-ysubject
Has Abstractpub_date
2019-01-16 00:00:00pages
233issue
1issn
2041-1723pii
10.1038/s41467-018-08181-yjournal_volume
10pub_type
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