Tuning ferromagnetism at room temperature by visible light.
- Náfrádi B Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland; laszlo.forro@epfl.ch nafradi@yahoo.com.
- Szirmai P Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
- Spina M Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
- Pisoni A Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
- Mettan X Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
- Nemes NM GFMC, Departamento de Fisica de Materiales, Universidad Complutense de Madrid, 28040 Madrid, Spain.
- Forró L Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland; laszlo.forro@epfl.ch nafradi@yahoo.com.
- Horváth E Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
- 2020-03-11
Published in:
- Proceedings of the National Academy of Sciences of the United States of America. - 2020
English
Most digital information today is encoded in the magnetization of ferromagnetic domains. The demand for ever-increasing storage space fuels continuous research for energy-efficient manipulation of magnetism at smaller and smaller length scales. Writing a bit is usually achieved by rotating the magnetization of domains of the magnetic medium, which relies on effective magnetic fields. An alternative approach is to change the magnetic state directly by acting on the interaction between magnetic moments. Correlated oxides are ideal materials for this because the effects of a small external control parameter are amplified by the electronic correlations. Here, we present a radical method for reversible, light-induced tuning of ferromagnetism at room temperature using a halide perovskite/oxide perovskite heterostructure. We demonstrate that photoinduced charge carriers from the [Formula: see text] photovoltaic perovskite efficiently dope the thin [Formula: see text] film and decrease the magnetization of the ferromagnetic state, allowing rapid rewriting of the magnetic bit. This manipulation could be accomplished at room temperature; hence this opens avenues for magnetooptical memory devices.
- Language
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- English
- Open access status
- bronze
- Identifiers
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- DOI 10.1073/pnas.1915370117
- PMID 32152127
- Persistent URL
- https://sonar.ch/global/documents/97029
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