Magnetic two-dimensional electron gas at the manganite-buffered LaAlO3/SrTiO3 interface

H. R. Zhang, Y. Zhang, H. Zhang, J. Zhang, X. Shen, X. X. Guan, Yunzhong Chen, R. C. Yu, Nini Pryds, Y. S. Chen, B. G. Shen, J. R. Sun

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Fabrication of highly mobile spin-polarized two-dimensional electron gas (2DEG) is crucially important for both fundamental and applied research. Usually, spin polarization appears below 10 K for the 2DEG of LaAlO3/SrTiO3 interface, stemming from the magnetic ordering of Ti3+ ions with the mediation of itinerant electrons. Herein, we report a magnetic 2DEG at a La7/8Sr1/8MnO3-buffered LaAlO3/SrTiO3 interface, which simultaneously shows electrically tunable anomalous Hall effect and high conductivity. The spin-polarized temperature for the 2DEG is promoted to 30 K while the mobility remains high. The magnetism likely results from a gradient manganese interdiffusion into SrTiO3. The present work demonstrates the great potential of manganite-buffered LaAlO3/SrTiO3 interfaces for spintronic applications.
Original languageEnglish
Article number195167
JournalPhysical Review B
Issue number19
Number of pages7
Publication statusPublished - 2017


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