Regensburg 2022 – scientific programme

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MA: Fachverband Magnetismus

MA 23: Magnetic Domain Walls

MA 23.4: Talk

Wednesday, September 7, 2022, 10:15–10:30, H48

Electrostatic shaping of magnetic transition regions in La0.7Sr0.3MnO3 — •Qianqian Lan¹, Michael Schnedler¹, Lars Freter¹, Lei Jin¹, Xian-Kui Wei¹, Thibaud Denneulin¹, András Kovács¹, Philipp Ebert¹, Xiaoyan Zhong², and Rafal E. Dunin-Borkowski¹ — ¹Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (ER-C 1) and Peter Grünberg Institut (PGI-5), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany — ²Department of Materials Science and Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, People's Republic of China

Ferroelectric domain walls with no rotation of polarization but a change of magnitude of polarization were reported theoretically and experimentally. However, magnetic domain walls with a similar configuration have not been observed experimentally yet to our knowledge. Here, we report an experimental example of a magnetic transition region in La0.7Sr0.3MnO3 films where the magnitude of magnetization gradually changes without rotation even well below Tc. The magnetic and electrostatic characterization reveals that a charge redistribution governs the shape, magnitude, and extent of the corresponding magnetic transition region. The charge redistribution is caused by the equilibrium between carrier diffusion and drift in the electrostatic field at an interface with sharp Mn compositional change in LSMO. Thus, our results demonstrate a case of the electrostatic shaping of magnetic transition regions, which can be expected to be a general property of complex oxide materials.