Spin-polarized current injection induced magnetic reconstruction at oxide interface

Fang, F.; Yin, Y. W.; Li, Qi; Lupke, G.

doi:10.1038/srep40048

Title: Spin-polarized current injection induced magnetic reconstruction at oxide interface

Journal Article · Wed Jan 04 00:00:00 EST 2017 · Scientific Reports

DOI:https://doi.org/10.1038/srep40048· OSTI ID:1346010

Fang, F. ^[1]; Yin, Y. W. ^[2]; Li, Qi ^[2]; Lupke, G. ^[1]

College of William and Mary, Williamsburg, VA (United States)
Pennsylvania State Univ., University Park, PA (United States)

Electrical manipulation of magnetism presents a promising way towards using the spin degree of freedom in very fast, low-power electronic devices. Though there has been tremendous progress in electrical control of magnetic properties using ferromagnetic (FM) nanostructures, an opportunity of manipulating antiferromagnetic (AFM) states should offer another route for creating a broad range of new enabling technologies. Here we selectively probe the interface magnetization of SrTiO₃/La_0.5Ca_0.5MnO₃/La_0.7Sr_0.3MnO₃ heterojunctions and discover a new spin-polarized current injection induced interface magnetoelectric (ME) effect. The accumulation of majority spins at the interface causes a sudden, reversible transition of the spin alignment of interfacial Mn ions from AFM to FM exchange-coupled, while the injection of minority electron spins alters the interface magnetization from C-type to A-type AFM state. In contrast, the bulk magnetization remains unchanged. We attribute the current-induced interface ME effect to modulations of the strong double-exchange interaction between conducting electron spins and local magnetic moments. As a result, the effect is robust and may serve as a viable route for electronic and spintronic applications.

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Research Organization:: College of William and Mary, Williamsburg, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-04ER46127

OSTI ID:: 1346010

Journal Information:: Scientific Reports, Vol. 7; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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