scholarly journals Thickness Dependence of the Dzyaloshinskii-Moriya Interaction in Co2FeAl Ultrathin Films: Effects of Annealing Temperature and Heavy-Metal Material

2018 ◽  
Vol 9 (4) ◽  
Author(s):  
M. Belmeguenai ◽  
Y. Roussigné ◽  
H. Bouloussa ◽  
S. M. Chérif ◽  
A. Stashkevich ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Ultrathin Films ◽  
Annealing Temperature ◽  
Thickness Dependence ◽  
Metal Material ◽  
Moriya Interaction

scholarly journals Dzyaloshinskii–Moriya interaction in noncentrosymmetric superlattices

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Woo Seung Ham ◽  
Abdul-Muizz Pradipto ◽  
Kay Yakushiji ◽  
Kwangsu Kim ◽  
Sonny H. Rhim ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Degrees Of Freedom ◽  
Orbit Coupling ◽  
Inversion Symmetry ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Band Formation ◽  
Research Activities ◽  
Moriya Interaction

AbstractDzyaloshinskii–Moriya interaction (DMI) is considered as one of the most important energies for specific chiral textures such as magnetic skyrmions. The keys of generating DMI are the absence of structural inversion symmetry and exchange energy with spin–orbit coupling. Therefore, a vast majority of research activities about DMI are mainly limited to heavy metal/ferromagnet bilayer systems, only focusing on their interfaces. Here, we report an asymmetric band formation in a superlattices (SL) which arises from inversion symmetry breaking in stacking order of atomic layers, implying the role of bulk-like contribution. Such bulk DMI is more than 300% larger than simple sum of interfacial contribution. Moreover, the asymmetric band is largely affected by strong spin–orbit coupling, showing crucial role of a heavy metal even in the non-interfacial origin of DMI. Our work provides more degrees of freedom to design chiral magnets for spintronics applications.

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

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Taehyun Kim ◽  
In Ho Cha ◽  
Yong Jin Kim ◽  
Gyu Won Kim ◽  
Andrey Stashkevich ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Exchange Coupling ◽  
Spin Orbit Coupling ◽  
Conduction Electrons ◽  
Indirect Exchange ◽  
Metal Atoms ◽  
Technological Potential ◽  
Interfacial Modification ◽  
Coupling Phenomena ◽  
Moriya Interaction

AbstractThe 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.

scholarly journals Giant Dzyaloshinskii-Moriya interaction in Rashba superlattices

2020 ◽  
Author(s):  
Woo-Seung Ham ◽  
Abdul-Muizz Pradipto ◽  
Kay Yakushiji ◽  
Kwangsu Kim ◽  
Sonny Rhim ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Material Design ◽  
Orbit Coupling ◽  
Inversion Symmetry ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Band Formation ◽  
Stacking Order ◽  
Magnetic Skyrmions ◽  
Moriya Interaction

Abstract Dzyaloshinskii-Moriya interaction (DMI) is considered as one of the most important energy for specific chiral texture such as magnetic skyrmions. The key of generating DMI is absence of structural inversion symmetry and exchange energy with spin-orbit coupling. Therefore, a vast majority of researches about DMI is mainly limited to heavy metal/ferromagnet bilayer systems, only focusing on their interfaces. Here, we report that asymmetric band formation in an artificial superlattice arises from inversion symmetry breaking in stacking order of atomic layers, resulting in bulk DMI. Such bulk DMI is more than 300% larger than simple sum of interfacial contribution. Moreover, the asymmetric band is largely affected by strong spin-orbit coupling, showing crucial role of a heavy metal even in the non-interfacial origin of DMI. Such Rashba superlattices can be a new class of material design for spintronics applications.

Thickness-dependence of optical constants for Ta2O5 ultrathin films

2012 ◽  
Vol 108 (4) ◽  
pp. 975-979 ◽  
Author(s):  
Dong-Xu Zhang ◽  
Yu-Xiang Zheng ◽  
Qing-Yuan Cai ◽  
Wei Lin ◽  
Kang-Ning Wu ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Optical Constants ◽  
Thickness Dependence

scholarly journals Thickness dependence of electronic structures in VO2 ultrathin films: Suppression of the cooperative Mott-Peierls transition

2020 ◽  
Vol 102 (11) ◽  
Author(s):  
D. Shiga ◽  
B. E. Yang ◽  
N. Hasegawa ◽  
T. Kanda ◽  
R. Tokunaga ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Electronic Structures ◽  
Thickness Dependence ◽  
Peierls Transition

scholarly journals Ferromagnetic layer thickness dependence of the Dzyaloshinskii-Moriya interaction and spin-orbit torques in Pt\Co\AlOx

AIP Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 065317 ◽  
Author(s):  
R. Lo Conte ◽  
G. V. Karnad ◽  
E. Martinez ◽  
K. Lee ◽  
N.-H. Kim ◽  
...  
Keyword(s):  
Layer Thickness ◽  
Ferromagnetic Layer ◽  
Thickness Dependence ◽  
Spin Orbit ◽  
Moriya Interaction

Brillouin light scattering investigation of the thickness dependence of Dzyaloshinskii-Moriya interaction inCo0.5Fe0.5ultrathin films

2016 ◽  
Vol 93 (17) ◽  
Author(s):  
M. Belmeguenai ◽  
M. S. Gabor ◽  
Y. Roussigné ◽  
A. Stashkevich ◽  
S. M. Chérif ◽  
...  
Keyword(s):  
Light Scattering ◽  
Thickness Dependence ◽  
Brillouin Light Scattering ◽  
Moriya Interaction

scholarly journals Temperature dependence of the Dzyaloshinskii-Moriya interaction in ultrathin films

2020 ◽  
Vol 101 (5) ◽  
Author(s):  
Yifan Zhou ◽  
Rhodri Mansell ◽  
Sergio Valencia ◽  
Florian Kronast ◽  
Sebastiaan van Dijken
Keyword(s):  
Temperature Dependence ◽  
Ultrathin Films ◽  
Moriya Interaction
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