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20 August 2020 Electrical control of the magnetic order in antiferromagnets interfaced with heavy metals
Pedram Khalili
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Proceedings Volume 11470, Spintronics XIII; 114703L (2020) https://doi.org/10.1117/12.2568172
Event: SPIE Nanoscience + Engineering, 2020, Online Only
Abstract
Antiferromagnets are magnetically ordered materials without a macroscopic magnetization. As a result, they are of interest in the development of memory devices where data cannot be erased by external magnetic fields. However, the absence of a macroscopic moment also makes it difficult to electrically control their magnetic order (Néel vector). Here we show that pillars of antiferromagnetic PtMn, which are grown on heavy metal layers of Pt and Ta, can be reversibly switched between different magnetic states by electric currents [1]. The devices are based on materials that are typically used in the magnetic memory industry, and we observe switching with very low current densities. Furthermore, by varying the amplitude of the writing current, multi-level memory characteristics can be achieved.
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Pedram Khalili "Electrical control of the magnetic order in antiferromagnets interfaced with heavy metals", Proc. SPIE 11470, Spintronics XIII, 114703L (20 August 2020); https://doi.org/10.1117/12.2568172
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KEYWORDS
Magnetism
Switching
Metals
Anisotropy
Picosecond phenomena
Energy efficiency
Oxides
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