Ruderman–Kittel–Kasuya–Yosida-type interfacial Dzyaloshinskii–Moriya interaction in heavy metal/ferromagnet heterostructures

The manipulation of magnetization with interfacial modification using various spin-orbit coupling phenomena has been recently revisited due to its scientific and technological potential for next-generation memory devices. Herein, we experimentally and theoretically demonstrate the interfacial Dzyalo...

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Bibliographic Details
Published in:Nature communications 2021-06, Vol.12 (1), p.3280-3280, Article 3280
Main Authors: Kim, Taehyun, Cha, In Ho, Kim, Yong Jin, Kim, Gyu Won, Stashkevich, Andrey, Roussigné, Yves, Belmeguenai, Mohamed, Chérif, Salim M., Samardak, Alexander S., Kim, Young Keun
Format: Article
Language:English
Subjects:
147/137
147/143
639/301/119/2793
639/766/119/1001
639/766/119/544
Anisotropy
Conduction electrons
Conductors
Exchanging
Ferromagnetism
Heavy metals
Heterostructures
Humanities and Social Sciences
Interlayers
Magnesium oxide
Memory devices
multidisciplinary
Oscillations
Propagation
Science
Science (multidisciplinary)
Spectrum analysis
Spin-orbit interactions
Symmetry
Thickness
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Summary:The manipulation of magnetization with interfacial modification using various spin-orbit coupling phenomena has been recently revisited due to its scientific and technological potential for next-generation memory devices. Herein, we experimentally and theoretically demonstrate the interfacial Dzyaloshinskii–Moriya interaction characteristics penetrating through a MgO dielectric layer inserted between the Pt and CoFeSiB. The inserted MgO layer seems to function as a chiral exchange interaction mediator of the interfacial Dzyaloshinskii–Moriya interaction from the heavy metal atoms to ferromagnet ones. The potential physical mechanism of the anti-symmetric exchange is based on the tunneling-like behavior of conduction electrons through the semi-conductor-like ultrathin MgO. Such behavior can be correlated with the oscillations of the indirect exchange coupling of the Ruderman–Kittel–Kasuya–Yosida type. From the theoretical demonstration, we could provide approximate estimation and show qualitative trends peculiar to the system under investigation. The mechanism of the interfacial Dzyaloshinskii-Moriya interaction in heavy metal-ferromagnet heterostructures is debated. Here, the authors show the oscillating behaviour of the interaction as a function of the MgO spacer layer thickness, supporting the interlayer exchange coupling mechanism of the Ruderman-Kittel-Kasuya-Yosida type.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-021-23586-y