Band Filling Control of the Dzyaloshinskii-Moriya Interaction in Weakly Ferromagnetic Insulators

Beutier, G.; Collins, S.P.; Димитрова, О. В.; Дмитриенко, В. Е.; Katsnelson, M. I.; Kvashnin, Yaroslav; Lichtenstein, A. I.; Мазуренко, В. В.; Nisbet, Gareth; Овчинникова, Е. Н.; Pincini, D.

doi:10.1103/physrevlett.119.167201

Cited by 49 publications

(30 citation statements)

References 62 publications

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“…The application of the sum rules for the spin (µ s ) 33 and orbital (µ l ) 34 magnetic moment to the integrated XMCD signal shown in Fig. 4 leads to a value of the orbital-to-spin ratio l/s = 2µ l /µ s = 0.5 (1) which is also confirmed by Co L-edge multiplet simulations (l/s ≈ 0.6) as described in § V C 2. This value confirms the one derived from our NXMS measurements within the experimental uncertainty, thus further consolidating our findings.…”

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confidence: 72%

Role of the orbital moment in a series of isostructural weak ferromagnets

et al. 2018

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The orbital contribution to the magnetic moment of the transition metal ion in the isostructural weak ferromagnets ACO3 (A=Mn,Co,Ni) and FeBO3 was investigated by a combination of first-principles calculations, non-resonant x-ray magnetic scattering and x-ray magnetic circular dichroism. A non-trivial evolution of the orbital moment as a function of the 3d orbitals filling is revealed, with a particularly large value found in the Co member of the family. Here, the coupling between magnetic and lattice degrees of freedom produced by the spin-orbit interaction results in a large single-ion anisotropy and a peculiar magnetic-moment-induced electron cloud distortion, evidenced by the appearance of a subtle scattering amplitude at space group-forbidden reflections and significant magnetostrictive effects. Our results, which complement a previous investigation on the sign of the Dzyaloshinskii−Moriya interaction across the series, highlight the importance of spinorbit coupling in the physics of weak ferromagnets and prove the ability of modern first-principles calculations to predict the properties of materials where the Dzyaloshinskii−Moriya interaction is a fundamental ingredient of the magnetic Hamiltonian.

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Section: The Peculiar Case Of Coco3supporting

confidence: 72%

Role of the orbital moment in a series of isostructural weak ferromagnets

et al. 2018

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“…Tuning of the magnetic interactions can be achieved via various mechanisms. For example, the DM interaction can be engineered at interfaces between ferromagnet and heavy metal 63 , or graphene 64 and controlled by 3d-band filling in weakly FM insulators 65 . Adjustment of the magnetic anisotropy or/and Heisenberg exchange is also important for the enhancement of the skyrmion stability without changing the skyrmion size.…”

Section: Discussionmentioning

confidence: 99%

Toward room-temperature nanoscale skyrmions in ultrathin films

et al. 2020

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Breaking the dilemma between small size and room-temperature stability is a necessary prerequisite for skyrmion-based information technology. Here we demonstrate by means of rate theory and an atomistic spin Hamiltonian that the stability of isolated skyrmions in ultrathin ferromagnetic films can be enhanced by the concerted variation of magnetic interactions while keeping the skyrmion size unchanged. We predict film systems where the lifetime of sub-10 nm skyrmions can reach years at ambient conditions. The long lifetime of such small skyrmions is due to exceptionally large Arrhenius pre-exponential factor and the stabilizing effect of the energy barrier is insignificant at room temperature. A dramatic increase in the pre-exponential factor is achieved thanks to the softening of magnon modes of the skyrmion, thereby increasing the entropy of the skyrmion with respect to the transition state for collapse. Increasing the number of skyrmion deformation modes should be a guiding principle for the realization of nanoscale, room-temperature stable skyrmions.

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“…Then, the coefficient D can be determined by D = (E 1 +E 4 -E 2 -E 3 )/(4S 2 ) [41]. There are a large number of literatures calculate the coefficients of the DM interaction using VASP [42][43][44]. Although the coefficients are very small, these works confirm the accuracy of the VASP results.…”

Section: Resultsmentioning

confidence: 66%

Tunable Magnetic Anisotropy and Dzyaloshinskii-Moriya Interaction in an Ultrathin van der Waals Fe3GeTe2/In2Se3 Heterostructure

Chen

Sun

et al. 2020

Front. Phys.

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The promise of future spintronic devices with nanoscale dimension, high-density, and low-energy consumption motivates the search for van der Waals heterostructure that stabilize topologically protected whirling spin textures such as magnetic skyrmions and domain walls. To translate these compelling features into practical devices, a key challenge lies in achieving effective manipulation of the magnetic anisotropy energy and the Dzyaloshinskii-Moriya (DM) interaction, the two key parameters that determine skyrmions. Through the first-principles calculation, we demonstrate that the polarization-induced broken inversion symmetry in the two-dimensional Fe 3 GeTe 2 /In 2 Se 3 multiferroic heterostructure does cause an interfacial DM interaction. The strong spin-orbit coupling triggers the magnetic anisotropy of the Fe 3 GeTe 2 /In 2 Se 3 heterostructure. The magnetic anisotropy and the DM interaction in Fe 3 GeTe 2 can be well-controlled by the ferroelectric polarization of In 2 Se 3. This work paves the way toward the spintronic devices based on van der Waals heterostructures.

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Band Filling Control of the Dzyaloshinskii-Moriya Interaction in Weakly Ferromagnetic Insulators

Cited by 49 publications

References 62 publications

Role of the orbital moment in a series of isostructural weak ferromagnets

Role of the orbital moment in a series of isostructural weak ferromagnets

Toward room-temperature nanoscale skyrmions in ultrathin films

Tunable Magnetic Anisotropy and Dzyaloshinskii-Moriya Interaction in an Ultrathin van der Waals Fe3GeTe2/In2Se3 Heterostructure

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