2021
DOI: 10.1038/s41598-021-00478-1
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Band structure analysis of the magneto-optical effect in bcc Fe

Abstract: Magneto-optical effects are among the basic tools for characterization of magnetic materials. Although these effects are routinely calculated by the ab initio codes, there is very little knowledge about their origin in the electronic structure. Here, we analyze the magneto-optical effect in bcc Fe and show that it originates in avoided band-crossings due to the spin-orbit interaction. Therefore, only limited number of bands and k-points in the Brillouin zone contribute to the effect. Furthermore, these contrib… Show more

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“…Although it has been demonstrated that linear response theory (Kubo formula) well describes spectra of quadratic MO effects, their detailed origin and understanding within electronic band structure is elusive nowadays, as it is already complicated to detail the origin of linear MOKE in simple FM material [61]. It is a challenge to establish understanding of the origin of higher-order MO effects within electronic structure, key prerequisite to tune, optimize and finally better employ the effect (see section 2).…”
Section: Advances In Science and Technology To Meet Challengesmentioning
confidence: 99%
“…Although it has been demonstrated that linear response theory (Kubo formula) well describes spectra of quadratic MO effects, their detailed origin and understanding within electronic band structure is elusive nowadays, as it is already complicated to detail the origin of linear MOKE in simple FM material [61]. It is a challenge to establish understanding of the origin of higher-order MO effects within electronic structure, key prerequisite to tune, optimize and finally better employ the effect (see section 2).…”
Section: Advances In Science and Technology To Meet Challengesmentioning
confidence: 99%