Berlin 2024 – scientific programme

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MA: Fachverband Magnetismus

MA 46: Poster II

MA 46.24: Poster

Thursday, March 21, 2024, 15:00–18:00, Poster C

Electrically controlled magnetoeletric switching in a multiferroic — Sergey Artyukhin², Louis Ponet², Janek Wettstein¹, Alexey Shuvaev¹, Maxim Mostovoy³, Andrei Pimenov¹, Anna Pimenov¹, and •Maksim Ryzhkov¹ — ¹Institute of Solid State Physics, Vienna University of Technology, Vienna, Austria — ²Quantum Materials Theory, Istituto Italiano di Tecnologia, Genova, Italy — ³Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands

Electric control of magnetism and magnetic control of ferroelectricity can improve the energy efficiency of magnetic memory and data-processing devices. However, the necessary magnetoelectric switching is hard to achieve, and requires more than just a coupling between the spin and the charge degrees of freedom. Recently, we showed that an application and subsequent removal of a magnetic field reverses the electric polarization of the multiferroic GdMn₂O₅, thus requiring two cycles to bring the system back to the original configuration. During this unusual hysteresis loop, four states with different magnetic configurations are visited by the system, with one half of all spins undergoing unidirectional full-circle rotation in increments of about 90 degrees. Our findings established a paradigm of topologically protected switching phenomena in ferroic materials.

Here I will present further study on electrically controlled magnetoelectric switching in the multiferroic GdMn₂O₅. We show that the sign of the resulting polarization can be precisely manipulated based on the direction of the electric field.

Keywords: magnetolectrics; multriferroics