Magnetic properties and energy dispersion of metallic antiferromagnets (K. Kang)
Автор: European Theoretical Spectroscopy Facility - ETSF
Загружено: 2022-10-10
Просмотров: 75
he first demonstration of electrical switching in metallic antiferromagnets in 2016 [1] has drawn our attention, and it has become new candidate material for future magnetic memory devices [2]. However, the majority of underlying physics for their unique properties is still under the veil. This work with first-principles methods investigates the ground-state magnetic interactions and quasiparticle energy dispersion relations to explain the magnetic structure and predict the magnetic properties of metallic antiferromagnets. Quantification of exchange interactions and magnetocrystalline anisotropy enables the calculation of the magnon dispersion of metallic antiferromagnets, leading to the estimation of their Néel temperature and the switching speed. In addition, we found the importance of magnetic dipole-dipole interaction in magnetocrystalline anisotropy energy. Comparison with experimental works provides a comprehensive understanding of the unique magnetic properties of metallic antiferromagnets.
The Illinois Materials Research Science and Engineering Center is supported by the National Science Foundation MRSEC program under NSF Award Number DMR-1720633.
[1] P. Wadleyet al. Science351, 587 (2016)
[2] S. A. Siddiqui et al. J. Appl. Phys. 128, 040904 (2020)
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