Kim, Kab-Jin Ryu, Jisu Gim, Gi-Hong Lee, Jae-Chul Shin, Kyung-Ho Lee, Hyun-Woo Choe, Sug-Bong 2024-01-20T16:01:43Z 2024-01-20T16:01:43Z 2021-09-05 2011-11-18 0031-9007 https://pubs.kist.re.kr/handle/201004/129801 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. English AMER PHYSICAL SOC WALL VISCOSITY REVERSAL Electric Current Effect on the Energy Barrier of Magnetic DomainWall Depinning: Origin of the Quadratic Contribution Article 10.1103/PhysRevLett.107.217205 1 PHYSICAL REVIEW LETTERS, v.107, no.21 PHYSICAL REVIEW LETTERS 107 21 scie scopus 000297156200018 2-s2.0-81555196396 Physics, Multidisciplinary Physics Article WALL VISCOSITY REVERSAL