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- W2318454637 abstract "We show that ferromagnetic/paramagnetic La${}_{0.75}$Sr${}_{0.25}$MnO${}_{3}$/LaNiO${}_{3}$ multilayers present an unexpected magnetic exchange-bias effect (EBE), observed in field-cooled magnetization loops. The exchange-bias field and the enhancement of the coercivity vanish around 50 K. We demonstrate that the oxidation state of the Ni and Mn cations changes from Mn${}^{3+}$-Ni${}^{3+}$ to Mn${}^{4+}$-Ni${}^{2+}$ in the layers close to the interface probed by x-ray absorption spectroscopy measurements. The variation of the valence states is accompanied by a change in the magnetic behavior of the cations at the La${}_{0.75}$Sr${}_{0.25}$MnO${}_{3}$/LaNiO${}_{3}$ interface, possibly giving rise to the formation of magnetic or magnetically frustrated regions that may pin the ferromagnetic La${}_{0.75}$Sr${}_{0.25}$MnO${}_{3}$ layers and explain the EBE." @default.
- W2318454637 created "2016-06-24" @default.
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- W2318454637 date "2012-03-26" @default.
- W2318454637 modified "2023-10-16" @default.
- W2318454637 title "Exchange-bias effect at La<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mrow><mml:mn>0.75</mml:mn></mml:mrow></mml:msub></mml:math>Sr<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mrow><mml:mn>0.25</mml:mn></mml:mrow></mml:msub></mml:math>MnO<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>/LaNiO<mml:…" @default.
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- W2318454637 doi "https://doi.org/10.1103/physrevb.85.094427" @default.
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