Large voltage tuning of Dzyalonshinskii-Moriya interaction: towards a chirality switch?

Claire Baraduc; Titiksha Srivastava; Marine Schott; Mohamed Belmeguenai; Yves Roussigné; Anne Bernand-Mantel; Laurent Ranno; Stefania Pizzini; S. M. Chérif; A. Stashkevich; Stéphane Auffret; Mair Chshiev; Hélène Béa

doi:10.1117/12.2323104

21 September 2018 Large voltage tuning of Dzyalonshinskii-Moriya interaction: towards a chirality switch?

Claire Baraduc, Titiksha Srivastava, Marine Schott, Mohamed Belmeguenai, Yves Roussigné, Anne Bernand-Mantel, Laurent Ranno, Stefania Pizzini, S. M. Chérif, A. Stashkevich, Stéphane Auffret, Mair Chshiev, Hélène Béa

Author Affiliations +

Proceedings Volume 10732, Spintronics XI; 1073232 (2018) https://doi.org/10.1117/12.2323104
Event: SPIE Nanoscience + Engineering, 2018, San Diego, California, United States

Abstract

Electric field can tune interfacial magnetism, thus paving the way towards new low power devices using gate voltage. In particular, its effect on skyrmions, which are promising to code information bits, is a critical issue. Here, we first address the effect of electric field on interfacial anisotropy in Pt/Co/AlOx ultrathin trilayers and the possibility to control skyrmion nucleation and annihilation with gate voltage. Then we report the effect of electric field on the interfacial interaction responsible for skyrmions, namely Dzyaloshinskii-Moriya Interaction (DMI). We demonstrate an unprecedented large electric field effect on DMI (β_DMI = 600 fJV^-1m^-1) in Ta/FeCoB/TaOx ultrathin trilayers through Brillouin Light Scattering spectroscopy. Additional Kerr effect observations lead us to propose that electric field could ultimately reverse the sign of DMI, resulting in chirality switch.

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Claire Baraduc, Titiksha Srivastava, Marine Schott, Mohamed Belmeguenai, Yves Roussigné, Anne Bernand-Mantel, Laurent Ranno, Stefania Pizzini, S. M. Chérif, A. Stashkevich, Stéphane Auffret, Mair Chshiev, and Hélène Béa "Large voltage tuning of Dzyalonshinskii-Moriya interaction: towards a chirality switch?", Proc. SPIE 10732, Spintronics XI, 1073232 (21 September 2018); https://doi.org/10.1117/12.2323104

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