TY - JOUR
T1 - Fast Magnetic Domain-Wall Motion in a Ring-Shaped Nanowire Driven by a Voltage
AU - Hu, Jia Mian
AU - Yang, Tiannan
AU - Momeni, Kasra
AU - Cheng, Xiaoxing
AU - Chen, Lei
AU - Lei, Shiming
AU - Zhang, Shujun
AU - Trolier-Mckinstry, Susan
AU - Gopalan, Venkatraman
AU - Carman, Gregory P.
AU - Nan, Ce Wen
AU - Chen, Long Qing
N1 - Funding Information:
The work is supported by National Science Foundation (NSF) with Grant Nos. of DMR-1235092 (J.-M.H.), DMR-1410714 (T.Y.), and by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award FG02-07ER46417 (X.C. and L.-Q.C). S.L. and V.G. acknowledge the financial support from the NSFMRSEC Center for Nanoscale Science through the grant number DMR-1420620. S.T-M. acknowledges financial support from the National Science Foundation, as part of the Center for Dielectrics and Piezoelectrics under Grant No. IIP-1361571. G.P.C. acknowledges support from the National Science Foundation through the Cooperative Agreement Award EEC-1160504 for Solicitation NSF 11-537 (TANMS). The work at Tsinghua University is supported by the NSF of China (Grant Nos. 51332001 and 11234005) and Tsinghua University (Grant No. 2014z01006). The computer simulations were performed on the LION and Cyberstar Computing Systems at the Pennsylvania State University supported in part by NSF Major Research Instrumentation Program through grant OCI-0821527 and in part by the Materials Simulation Center.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/4/13
Y1 - 2016/4/13
N2 - Magnetic domain-wall motion driven by a voltage dissipates much less heat than by a current, but none of the existing reports have achieved speeds exceeding 100 m/s. Here phase-field and finite-element simulations were combined to study the dynamics of strain-mediated voltage-driven magnetic domain-wall motion in curved nanowires. Using a ring-shaped, rough-edged magnetic nanowire on top of a piezoelectric disk, we demonstrate a fast voltage-driven magnetic domain-wall motion with average velocity up to 550 m/s, which is comparable to current-driven wall velocity. An analytical theory is derived to describe the strain dependence of average magnetic domain-wall velocity. Moreover, one 180°domain-wall cycle around the ring dissipates an ultrasmall amount of heat, as small as 0.2 fJ, approximately 3 orders of magnitude smaller than those in current-driven cases. These findings suggest a new route toward developing high-speed, low-power-dissipation domain-wall spintronics.
AB - Magnetic domain-wall motion driven by a voltage dissipates much less heat than by a current, but none of the existing reports have achieved speeds exceeding 100 m/s. Here phase-field and finite-element simulations were combined to study the dynamics of strain-mediated voltage-driven magnetic domain-wall motion in curved nanowires. Using a ring-shaped, rough-edged magnetic nanowire on top of a piezoelectric disk, we demonstrate a fast voltage-driven magnetic domain-wall motion with average velocity up to 550 m/s, which is comparable to current-driven wall velocity. An analytical theory is derived to describe the strain dependence of average magnetic domain-wall velocity. Moreover, one 180°domain-wall cycle around the ring dissipates an ultrasmall amount of heat, as small as 0.2 fJ, approximately 3 orders of magnitude smaller than those in current-driven cases. These findings suggest a new route toward developing high-speed, low-power-dissipation domain-wall spintronics.
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U2 - 10.1021/acs.nanolett.5b05046
DO - 10.1021/acs.nanolett.5b05046
M3 - Article
AN - SCOPUS:84964955476
SN - 1530-6984
VL - 16
SP - 2341
EP - 2348
JO - Nano letters
JF - Nano letters
IS - 4
ER -