Tuning Dzyaloshinskii-Moriya interactions in magnetic bilayers with a ferroelectric substrate

Zhang, B. H.; Hou, Yusheng; Wang, Z.; Wu, Ruqian

doi:10.1103/physrevb.103.054417

Cited by 9 publications

(3 citation statements)

References 43 publications

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“…Moreover, since skyrmions can be created and destroyed with electric fields, insulating materials including oxides are needed as well 2 . The modification of electronic states around Fermi level at the interface between oxide and FM materials and its influence on magnetic properties are nontrivial, so different combinations of layer materials are studied both experimentally and numerically by first principles calculations 3 – 7 . Antiferromagnetic oxides (AFO) belongs to this group and can be ideal candidates towards the fulfillment of these requirements.…”

Section: Introductionmentioning

confidence: 99%

Strong interfacial Dzyaloshinskii–Moriya induced in Co due to contact with NiO

Kowacz

Mazalski

Sveklo

et al. 2022

Sci Rep

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The magnetic properties of NiO/Co/Pt as a function of Co layer thickness were investigated by polar magneto-optical Kerr effect (PMOKE) (magnetometry and microscopy) and Brillouin Light Scattering (BLS) spectroscopy. PMOKE measurements revealed strong surface anisotropy (1.8 mJ/m2) favoring perpendicular magnetic anisotropy and asymmetric domain wall propagation explained by anticlockwise chirality. BLS measurements show that this chirality is induced by strong interfacial Dzyaloshinskii–Moriya interaction (+ 2.0 pJ/m). This is one of the highest values reported so far for Co layers surrounded by different layers. The observed chirality is opposite to what has been found in Co/oxide interfaces. These results and data published earlier, indicate that the strength of interfacial Dzyaloshinskii–Moriya interaction increases with the amount of stoichiometric NiO. Therefore, this work shows that NiO is the source of the interfacial Dzyaloshinskii–Moriya interaction.

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Section: Introductionmentioning

confidence: 99%

Strong interfacial Dzyaloshinskii–Moriya induced in Co due to contact with NiO

Kowacz

Mazalski

Sveklo

et al. 2022

Sci Rep

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show abstract

“…[ 220,221 ] Theoretical models, particularly those based on DFT, have been employed to explicate the phonon shift due to changes in magnetic order. [ 222–226 ] However, a significant discrepancy between the experimental (less than 1 cm −1 ) and calculated (more than ten cm −1 ) values warrants the development of a new theoretical model. [ 223 ]…”

Section: Inelastic Light Scattering Spectroscopy In 2d Magnetsmentioning

confidence: 99%

Magneto‐Optical Interactions in Layered Magnets

Wu,

Tan

2024

Adv Funct Materials

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The rapidly emerging field of 2D magnetic materials has garnered significant attention due to its fascinating physical properties and wide‐ranging potential applications. This review highlights the importance of magneto‐optical interactions as a crucial tool for both studying and modulating 2D magnets. It offers a comprehensive survey of current research concerning magneto‐optical interactions in 2D magnetic materials, encompassing the magneto‐optical Kerr effect, reflection magnetic circular dichroism, second‐harmonic generation, photoluminescence, inelastic light scattering, and time‐resolved spectroscopy. This review discusses how these techniques provide insights into the properties of 2D magnets, enabling exploration of magnetic phase transitions, lattice alterations, spin dynamics, as well as their responses to external fields. Moreover, it emphasizes the modulation of magnetic properties by photo‐stimulation and offers a brief outlook on this swiftly developing field.

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“…The Dzyaloshinskii–Moriya interaction (DMI), as one of the origins of chiral magnetism, is currently attracting huge attention in the research community focusing on DW devices or skyrmions. , By modulating the sign and size of the DMI (characterized by the parameter D (J/m 2 )), it is possible to achieve low-power and controllable chiral DW devices . Until now, several feasible methods of DMI control, i.e., chirality switching (CS), have been reported, such as ferroelectric (FE) proximity effect, − gate bias voltage control, , mechanical strain, and hydrogen chemisorption . Interesting simulation results based on CS such as driving DWs and skyrmion-based logic family are also proposed.…”

Section: Introductionmentioning

confidence: 99%

Ultralow Power and Shifting-Discretized Magnetic Racetrack Memory Device Driven by Chirality Switching and Spin Current

Lin

et al. 2023

ACS Appl. Mater. Interfaces

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Magnetic racetrack memory has significantly evolved and developed since its first experimental verification and is considered one of the most promising candidates for future high-density on-chip solid-state memory. However, both the lack of a fast and precise magnetic domain wall (DW) shifting mechanism and the required extremely high DW motion (DWM) driving current make the racetrack difficult to commercialize. Here, we propose a method for coherent DWM that is free from the above issues, which is driven by chirality switching (CS) and an ultralow spin−orbit−torque (SOT) current. The CS, as the driving force of DWM, is achieved by the sign change of the Dzyaloshinskii−Moriya interaction, which is further induced by a ferroelectric switching voltage. The SOT is used to break the symmetry when the magnetic moment is rotated in the Bloch direction. We numerically investigate the underlying principle and the effect of key parameters on the DWM by micromagnetic simulations. Under the CS mechanism, a fast (∼10 2 m/s), ultralow energy (∼5 attoJoule), and precisely discretized DWM can be achieved. Considering that skyrmions with topological protection and smaller size are also promising for future racetracks, we similarly evaluate the feasibility of applying such a CS mechanism to a skyrmion. However, we find that the CS causes it to "breathe" instead of moving. Our results demonstrate that the CS strategy is suitable for future DW racetrack memory with ultralow power consumption and discretized DWM.

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Tuning Dzyaloshinskii-Moriya interactions in magnetic bilayers with a ferroelectric substrate

Cited by 9 publications

References 43 publications

Strong interfacial Dzyaloshinskii–Moriya induced in Co due to contact with NiO

Strong interfacial Dzyaloshinskii–Moriya induced in Co due to contact with NiO

Magneto‐Optical Interactions in Layered Magnets

Ultralow Power and Shifting-Discretized Magnetic Racetrack Memory Device Driven by Chirality Switching and Spin Current

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