Electric current effect on energy barrier of magnetic domainwall depinning: Origin of quadratic contribution
SCIE
SCOPUS
- Title
- Electric current effect on energy barrier of magnetic domainwall depinning: Origin of quadratic contribution
- Authors
- Kim, KJ; Ryu, J; Gim, GH; Lee, JC; Shin, KH; Lee, HW; Choe, SB
- Date Issued
- 2011-11-18
- Publisher
- AMER PHYSICAL SOC
- Abstract
- The energy barrier of a magnetic domain wall trapped at a defect is measured experimentally. When the domain wall is pushed by an electric current and/or a magnetic field, the depinning time from the barrier exhibits perfect exponential distribution, indicating that a single energy barrier governs the depinning. The electric current is found to generate linear and quadratic contributions to the energy barrier, which are attributed to the nonadiabatic and adiabatic spin-transfer torques, respectively. The adiabatic spin-transfer torque reduces the energy barrier and, consequently, causes depinning at lower current densities, promising a way toward low-power current-controlled magnetic applications.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12478
- DOI
- 10.1103/PHYSREVLETT.107.217205
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 107, no. 21, page. 217205, 2011-11-18
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