High rotatable magnetic anisotropy in MnBi thin films

Myagkov, V. G.; Быкова, Л. Е.; Yakovchuk, V. Yu.; Мацынин, А. А.; Великанов, Д. А.; Patrin, G. S.; Yurkin, G. Yu.; Бондаренко, Г. Н.

doi:10.1134/s0021364017100095

Cited by 8 publications

(2 citation statements)

References 36 publications

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“…Although highly oriented or epitaxial thin films have been mainly studied for the magnetic anisotropy, recent developments have revealed that “randomly‐oriented polycrystalline” films made of the large κ system (due to the strong magneto‐crystalline anisotropy of K > 10 5 –10 6 J m −3 ) show the omni‐directional domain arrangement in any spatial direction (Figure 1c). [ 6–8 ] The electrical responses such as anomalous Hall and Nernst effects are empirically known to be proportional to the magnetization in conventional FMs. [ 9 ] Therefore, the larger the magnetization is, the larger the response becomes.…”

Section: Introductionmentioning

confidence: 99%

Omnidirectional Control of Large Electrical Output in a Topological Antiferromagnet

Higo

Kondou

et al. 2021

Adv Funct Materials

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Control of magnetization direction is essential for the wide application of ferromagnets; it defines the signal size of memory and sensor. However, the magnetization itself causes a dilemma. While its size matters to obtain strong responses upon its reversal, the large magnetization concomitantly suppresses the range of its directional control because of the demagnetizing field. On the other hand, realization of the desired magnetic anisotropy requires careful engineering of crystalline and interfacial effects to overcome the demagnetization barrier. Thus, it would be ideal if one could find alternative magnets that carry no magnetization but strong responses. The discovery of a topological metallic state in the antiferromagnet Mn3Sn is significant; they host a large Berry curvature in momentum space, enabling the observation of disproportionately large transverse responses such as anomalous Hall and Nernst effects, the key functionalities for replacing ferromagnets in the magnetic devices. Here, the experimental realization of omnidirectional control of the large responses in an antiferromagnet is reported. In particular, it is demonstrated that the absence of shape anisotropy enables the omnidirectional control, and lifts the shape constraint in designing the magnetic devices. This work lays the technological foundation for developing simple‐structured high‐performance devices including multi‐level memory and heat flux sensor.

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Section: Introductionmentioning

confidence: 99%

Omnidirectional Control of Large Electrical Output in a Topological Antiferromagnet

Higo

Kondou

et al. 2021

Adv Funct Materials

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“…Magnetic easy axis of MnBi alloy with Pd 1/2 and Rh remains the same as bulk MnBi and lies out-of-plane direction, while the magnetic-easy-axis of MnBi alloy with Li, O, Pd and Pt lie in-plane. Pd can rotate the magnetic-easy-axis 40 from in-plane to out-of-plane depending upon the percentage of Pd that would be incorporated in MnBi. We anticipate this comprehensive study of MnBi alloy spurs more theoretical and experimental study.…”

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confidence: 99%