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  Interfacial control of ferromagnetism in ultrathin SrRuO3 films sandwiched between ferroelectric BaTiO3 layers

Gu, Y., Song, C., Zhang, Q., Li, F., Tan, H., Xu, K., et al. (2020). Interfacial control of ferromagnetism in ultrathin SrRuO3 films sandwiched between ferroelectric BaTiO3 layers. ACS Applied Materials and Interfaces, 12(5), 6707-6715. doi:10.1021/acsami.9b20941.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0008-D5E3-7 Version Permalink: https://hdl.handle.net/21.11116/0000-0009-4F49-E
Genre: Journal Article

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 Creators:
Gu, Youdi1, Author
Song, Cheng1, Author
Zhang, Qinghua1, Author
Li, Fan1, Author
Tan, Hengxin2, Author
Xu, Kun1, Author
Li, Jia1, Author
Saleem, Muhammad S1, Author
Fayaz, Muhammad U1, Author
Peng, Jingjing1, Author
Hu, Fengxia1, Author
Gu, Lin1, Author
Liu, Wei1, Author
Zhang, Zhidong1, Author
Pan, Feng1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society, Weinberg 2, 06120 Halle, DE, ou_3287476              

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 Abstract: Interfaces between materials provide an intellectually rich arena for fundamental scientific discovery and device design. However, the frustration of magnetization and conductivity of perovskite oxide films under reduced dimensionality is detrimental to their device performance, preventing their active low-dimensional application. Herein, by inserting the ultrathin 4d ferromagnetic SrRuO3 layer between ferroelectric BaTiO3 layers to form a sandwich heterostructure, we observe enhanced physical properties in ultrathin SrRuO3 films, including longitudinal conductivity, Curie temperature, and saturated magnetic moment. Especially, the saturated magnetization can be enhanced to ∼3.12 μB/Ru in ultrathin BaTiO3/SrRuO3/BaTiO3 trilayers, which is beyond the theoretical limit of bulk value (2 μB/Ru). This observation is attributed to the synergistic ferroelectric proximity effect (SFPE) at upper and lower BaTiO3/SrRuO3 heterointerfaces, as revealed by the high-resolution lattice structure analysis. This SFPE in dual-ferroelectric interface cooperatively induces ferroelectric-like lattice distortions in RuO6 oxygen octahedra and subsequent spin-state crossover in SrRuO3, which in turn accounts for the observed enhanced magnetization. Besides the fundamental significance of interface-induced spin–lattice coupling, our findings also provide a viable route to the electrical control of magnetic ordering, taking a step toward low-power applications in all-oxide spintronics.

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 Dates: 2020-01-132020-02-05
 Publication Status: Issued
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 Identifiers: BibTex Citekey: P13866
DOI: 10.1021/acsami.9b20941
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Title: ACS Applied Materials and Interfaces
  Other : ACS Applied Materials & Interfaces
  Abbreviation : ACS Appl. Mater. Interfaces
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 12 (5) Sequence Number: - Start / End Page: 6707 - 6715 Identifier: ISSN: 1944-8244
CoNE: https://pure.mpg.de/cone/journals/resource/1944-8244