Mar 20 – 23, 2023
Campus Garching
Europe/Berlin timezone

Control of the emergent inductance in helimagnet YMn6Sn6 via Tb substitution

Mar 23, 2023, 11:00 AM
MW 2 001 - Lecture hall (Fakultät für Maschinenwesen)

MW 2 001 - Lecture hall

Fakultät für Maschinenwesen

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Talk (25 + 5 min) Magnetism, Superconductivity, Topological Systems, Magnetic Thin Films an other electronic phenomena Bulk Magnetism 2


Jonathan White (Paul Scherrer Institute)


The ac current-driven motion of spiral spin textures was shown to give rise to emergent electric fields that provide functionality as an electrical inductor - the so-called emergent inductance phenomenon [1-2]. Most recently, the first such system to display this phenomenon beyond room temperature was identified to be the helical magnet YMn6Sn6 [3]. To deepen the microscopic understanding of emergent inductance and optimise the materials conditions for its realisation, we report the investigation of the effect of partial substitution of Y by Tb. By both small angle neutron scattering and inductance measurements, we reveal that the pinning effect due to Tb doping selectively and largely suppresses the negative component of emergent inductance. In contrast, the positive component is left largely in tact. We find that the latter component can be hosted by both spin helical order, and even a spin-collinear antiferromagnetic structure in the presence of pronounced spin fluctuations. From our observations we extract empirical rules for the selection of either positive or negative emergent inductance effects in short period magnets.
[1] N. Nagaosa, Jpn. J. Appl. Phys. 58, 12090 (2019).
[2] T. Yokouchi et al. Nature 586, 232 (2020).
[3] A. Kitaori et al. PNAS 118, e2105422118 (2021).
[4] A. Kitaori, J.S. White et al., submitted (2022).

Primary authors

Mr Aki Kitaori (University of Tokyo) Dr Deepak Singh (Paul Scherrer Institute) Jonathan White (Paul Scherrer Institute) Prof. Naoto Nagaosa (University of Tokyo & RIKEN CEMS) Prof. Naoya Kanazawa (University of Tokyo) Prof. Taka-hisa Arima (University of Tokyo) Dr Victor Ukleev (BESSY, HZB) Prof. Yoshinori Tokura (University of Tokyo & RIKEN CEMS) Mr Yuki Furukawa (University of Tokyo)

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