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 - 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 -