scholarly journals Domain wall diode based on functionally graded Dzyaloshinskii–Moriya interaction

2020 ◽  
Vol 116 (22) ◽  
pp. 222406
Author(s):  
Kostiantyn V. Yershov ◽  
Volodymyr P. Kravchuk ◽  
Denis D. Sheka ◽  
Jeroen van den Brink ◽  
Avadh Saxena
Keyword(s):  
Domain Wall ◽  
Functionally Graded ◽  
Moriya Interaction

scholarly journals Reducing Dzyaloshinskii-Moriya interaction and field-free spin-orbit torque switching in synthetic antiferromagnets

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ruyi Chen ◽  
Qirui Cui ◽  
Liyang Liao ◽  
Yingmei Zhu ◽  
Ruiqi Zhang ◽  
...  
Keyword(s):  
Domain Wall ◽  
Tunnel Junctions ◽  
Low Power Consumption ◽  
Stray Field ◽  
Magnetic Memory ◽  
Spin Orbit ◽  
Theoretic Analysis ◽  
Spintronic Devices ◽  
Deterministic Switching ◽  
Moriya Interaction

AbstractPerpendicularly magnetized synthetic antiferromagnets (SAF), possessing low net magnetization and high thermal stability as well as easy reading and writing characteristics, have been intensively explored to replace the ferromagnetic free layers of magnetic tunnel junctions as the kernel of spintronic devices. So far, utilizing spin-orbit torque (SOT) to realize deterministic switching of perpendicular SAF have been reported while a large external magnetic field is typically needed to break the symmetry, making it impractical for applications. Here, combining theoretic analysis and experimental results, we report that the effective modulation of Dzyaloshinskii-Moriya interaction by the interfacial crystallinity between ferromagnets and adjacent heavy metals plays an important role in domain wall configurations. By adjusting the domain wall configuration between Bloch type and Néel type, we successfully demonstrate the field-free SOT-induced magnetization switching in [Co/Pd]/Ru/[Co/Pd] SAF devices constructed with a simple wedged structure. Our work provides a practical route for utilization of perpendicularly SAF in SOT devices and paves the way for magnetic memory devices with high density, low stray field, and low power consumption.

scholarly journals Electric field control of magnetic domain wall motion via modulation of the Dzyaloshinskii-Moriya interaction

2018 ◽  
Vol 4 (12) ◽  
pp. eaav0265 ◽  
Author(s):  
Tomohiro Koyama ◽  
Yoshinobu Nakatani ◽  
Jun’ichi Ieda ◽  
Daichi Chiba
Keyword(s):  
Domain Wall ◽  
Electric Field ◽  
Magnetic Domain ◽  
Domain Wall Motion ◽  
Asymmetric Structure ◽  
Velocity Change ◽  
Spintronic Devices ◽  
Electrical Manipulation ◽  
Substantial Change ◽  
Moriya Interaction

We show that the electric field (EF) can control the domain wall (DW) velocity in a Pt/Co/Pd asymmetric structure. With the application of a gate voltage, a substantial change in DW velocity up to 50 m/s is observed, which is much greater than that observed in previous studies. Moreover, modulation of a DW velocity exceeding 100 m/s is demonstrated in this study. An EF-induced change in the interfacial Dzyaloshinskii-Moriya interaction (DMI) up to several percent is found to be the origin of the velocity modulation. The DMI-mediated velocity change shown here is a fundamentally different mechanism from that caused by EF-induced anisotropy modulation. Our results will pave the way for the electrical manipulation of spin structures and dynamics via DMI control, which can enhance the performance of spintronic devices.

scholarly journals Unidirectional Magnon-Driven Domain Wall Motion Due to the Interfacial Dzyaloshinskii-Moriya Interaction

2019 ◽  
Vol 122 (14) ◽  
Author(s):  
Kyoung-Whan Kim ◽  
Seo-Won Lee ◽  
Jung-Hwan Moon ◽  
Gyungchoon Go ◽  
Aurélien Manchon ◽  
...  
Keyword(s):  
Domain Wall ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Moriya Interaction

Bending Behavior of Functionally Graded Piezoelectric Laminated Actuators under Electric Fields

2007 ◽  
Vol 336-338 ◽  
pp. 2619-2623
Author(s):  
Yasuhide Shindo ◽  
Fumio Narita
Keyword(s):  
Domain Wall ◽  
Electric Fields ◽  
Piezoelectric Actuator ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Functionally Graded ◽  
Experimental Results ◽  
Nonlinear Bending ◽  
Bending Behavior ◽  
Functionally Graded Piezoelectric

We present numerical and experimental results on the nonlinear bending behavior due to domain wall motion in functionally graded piezoelectric actuator under alternating current (ac) electric fields. A nonlinear finite element method is employed to analyze the dynamic response of functionally graded piezoelectric actuator. A phenomenological model of domain wall motion is used in computation, and the effects of ac electric field amplitude and frequency, number of layers, and property gradation on the deflection of the cantilever actuators are examined. Experimental results, which verify the model, are presented using a functionally graded bimorph. The numerical results agree very well with the experimental values.

scholarly journals Quantitative accordance of Dzyaloshinskii-Moriya interaction between domain-wall and spin-wave dynamics

2019 ◽  
Vol 100 (22) ◽  
Author(s):  
Dae-Yun Kim ◽  
Nam-Hui Kim ◽  
Yong-Keun Park ◽  
Min-Ho Park ◽  
Joo-Sung Kim ◽  
...  
Keyword(s):  
Domain Wall ◽  
Spin Wave ◽  
Wave Dynamics ◽  
Moriya Interaction

Asymmetric Domain-Wall Depinning Induced by Dzyaloshinskii–Moriya Interaction

2015 ◽  
Vol 51 (11) ◽  
pp. 1-3 ◽  
Author(s):  
F. C. Ummelen ◽  
D.-S. Han ◽  
J.-S. Kim ◽  
H. J. M. Swagten ◽  
B. Koopmans
Keyword(s):  
Domain Wall ◽  
Moriya Interaction

Asymmetric domain-wall depinning induced by Dzyaloshinskii Moriya interaction

2015 ◽  
Author(s):  
F. Ummelen ◽  
D. Han ◽  
J. Kim ◽  
H. Swagten ◽  
B. Koopmans
Keyword(s):  
Domain Wall ◽  
Moriya Interaction

scholarly journals Soliton-like magnetic domain wall motion induced by the interfacial Dzyaloshinskii–Moriya interaction

2015 ◽  
Vol 12 (2) ◽  
pp. 157-161 ◽  
Author(s):  
Yoko Yoshimura ◽  
Kab-Jin Kim ◽  
Takuya Taniguchi ◽  
Takayuki Tono ◽  
Kohei Ueda ◽  
...  
Keyword(s):  
Domain Wall ◽  
Wall Motion ◽  
Magnetic Domain ◽  
Domain Wall Motion ◽  
Magnetic Domain Wall ◽  
Moriya Interaction

scholarly journals Very large domain wall velocities in Pt/Co/GdOx and Pt/Co/Gd trilayers with Dzyaloshinskii-Moriya interaction

2016 ◽  
Vol 113 (6) ◽  
pp. 67001 ◽  
Author(s):  
Thai Ha Pham ◽  
J. Vogel ◽  
J. Sampaio ◽  
M. Vaňatka ◽  
J.-C. Rojas-Sánchez ◽  
...  
Keyword(s):  
Domain Wall ◽  
Large Domain ◽  
Moriya Interaction
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