Flexomagnetism of thin Cr<sub>2</sub>O<sub>3</sub> films
ORAL
Abstract
Cr2O3 is the only known uniaxial antiferromagnetic material that is also magnetoelectric at room temperature. This renders Cr2O3 a technologically relevant playground for the realisation of different device ideas for prospective antiferromagnetic spintronics. We discovered the presence of flexomagnetic effects in Cr2O3, which come about due to the impact of a strain gradient on the thermodynamic properties, namely on the Neel temperature. By combining magnetotransport and Nitrogen Vacancy magnetometry characterizations, we experimentally determine the presence of the gradient of the Neel temperature in a 50-nm-thick Cr2O3 thin film and quantify that the magnetic moment, generated by this new effect, can be as high as 15 μB/nm2. Furthermore, due to good oxide-oxide heteroepitaxy and respective compressive strain, the Neel temperature in Cr2O3 thin films can be enhanced persistently up to 100 °C, which is 60 °C higher than the bulk transition temperature. The emergent flexomagnetism-driven ferromagnetic order parameter in antiferromagnetic thin films offers more flexibility in the design of spintronic and magnonic devices and can be of relevance for other antiferromagnetic materials.
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Publication:P. Makushko, T. Kosub, O. V. Pylypovskyi et al., Nature Communications (2022), in press.
Presenters
Oleksandr V Pylypovskyi
Helmholtz Zentrum Dresden-Rossendorf
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research
Authors
Oleksandr V Pylypovskyi
Helmholtz Zentrum Dresden-Rossendorf
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research
Pavlo Makushko
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research
Tobias Kosub
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research
Natascha Hedrich
University of Basel
JIang Li
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research
Alexej Pashkin
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research
Stanislav Avdoshenko
Institute for Solid State Research, Leibniz Institute for Solid State and Materials Research Dresden
Rene Hübner
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research
Fabian Ganss
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research
Daniel Wolf
IFW Dresden, Germany
Institute for Solid State Research, IFW Dresdenm Dresden, Germany
Leibniz Institute for Solid State and Materials Research, IFW Dresden
Axel Lubk
Institute for Solid State Research, IFW Dresdenm Dresden, Germany
Leibniz Institute for Solid State and Materials Research, IFW Dresden
Maciej Oskar Liedke
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Radiation Physics
Maik Butterling
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Radiation Physics
Andreas Wagner
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Radiation Physics
Kai Wagner
University of Basel
Brendan Shields
University of Basel
Paul Lehmann
University of Basel
Ihor Veremchuk
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research
