Self-assembly as a tool to study microscale curvature and strain-dependent magnetic properties

Autor: Balram Singh, Jorge. A. Otálora, Tong H. Kang, Ivan Soldatov, Dmitriy D. Karnaushenko, Christian Becker, Rudolf Schäfer, Daniil Karnaushenko, Volker Neu, Oliver G. Schmidt
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: npj Flexible Electronics, Vol 6, Iss 1, Pp 1-9 (2022)
Druh dokumentu: article
ISSN: 2397-4621
DOI: 10.1038/s41528-022-00210-7
Popis: Abstract The extension of 2D ferromagnetic structures into 3D curved geometry enables to tune its magnetic properties such as uniaxial magnetic anisotropy. Tuning the anisotropy with strain and curvature has become a promising ingredient in modern electronics, such as flexible and stretchable magnetoelectronic devices, impedance-based field sensors, and strain gauges, however, has been limited to extended thin films and to only moderate bending. By applying a self-assembly rolling technique using a polymeric platform, we provide a template that allows homogeneous and controlled bending of a functional layer adhered to it, irrespective of its shape and size. This is an intriguing possibility to tailor the sign and magnitude of the surface strain of integrated, micron-sized devices. In this article, the impact of strain and curvature on the magnetic ground state and anisotropy is quantified for thin-film Permalloy micro-scale structures, fabricated on the surface of the tubular architectures, using solely electrical measurements.
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