TY - JOUR
T1 - Two-barrier stability that allows low-power operation in current-induced domain-wall motion
AU - Kim, Kab Jin
AU - Hiramatsu, Ryo
AU - Koyama, Tomohiro
AU - Ueda, Kohei
AU - Yoshimura, Yoko
AU - Chiba, Daichi
AU - Kobayashi, Kensuke
AU - Nakatani, Yoshinobu
AU - Fukami, Shunsuke
AU - Yamanouchi, Michihiko
AU - Ohno, Hideo
AU - Kohno, Hiroshi
AU - Tatara, Gen
AU - Ono, Teruo
N1 - Funding Information:
This work was partly supported by a Grant-in-Aid for Scientific Research (S) from the Japan Society for the Promotion of Science (JSPS), by the Collaborative Research Program of the Institute for Chemical Research, Kyoto University, and by JSPS through its ‘Funding program for world-leading innovative R & D on science and technology’ (FIRST program).
PY - 2013
Y1 - 2013
N2 - Energy barriers in magnetization reversal dynamics have long been of interest because the barrier height determines the thermal stability of devices as well as the threshold force triggering their dynamics. Especially in memory and logic applications, there is a dilemma between the thermal stability of bit data and the operation power of devices, because larger energy barriers for higher thermal stability inevitably lead to larger magnetic fields (or currents) for operation. Here we show that this is not the case for current-induced magnetic domain-wall motion induced by adiabatic spin-transfer torque. By quantifying domain-wall depinning energy barriers by magnetic field and current, we find that there exist two different pinning barriers, extrinsic and intrinsic energy barriers, which govern the thermal stability and threshold current, respectively. This unique two-barrier system allows low-power operation with high thermal stability, which is impossible in conventional single-barrier systems.
AB - Energy barriers in magnetization reversal dynamics have long been of interest because the barrier height determines the thermal stability of devices as well as the threshold force triggering their dynamics. Especially in memory and logic applications, there is a dilemma between the thermal stability of bit data and the operation power of devices, because larger energy barriers for higher thermal stability inevitably lead to larger magnetic fields (or currents) for operation. Here we show that this is not the case for current-induced magnetic domain-wall motion induced by adiabatic spin-transfer torque. By quantifying domain-wall depinning energy barriers by magnetic field and current, we find that there exist two different pinning barriers, extrinsic and intrinsic energy barriers, which govern the thermal stability and threshold current, respectively. This unique two-barrier system allows low-power operation with high thermal stability, which is impossible in conventional single-barrier systems.
UR - http://www.scopus.com/inward/record.url?scp=84879655431&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84879655431&partnerID=8YFLogxK
U2 - 10.1038/ncomms3011
DO - 10.1038/ncomms3011
M3 - Article
C2 - 23771026
AN - SCOPUS:84879655431
VL - 4
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 2011
ER -