Yun, Sang-Jun Yoo, Sang-Cheol Choe, Sug-Bong Min, Byoung-Chul 2024-01-20T08:33:21Z 2024-01-20T08:33:21Z 2021-09-02 2014-11 0374-4884 https://pubs.kist.re.kr/handle/201004/126212 The spin torque (ST) efficiency and energy barrier of domain wall (DW) depinning are investigated by analyzing the telegraph noise in nanostructured ferromagnetic Pt/Co/Pt films. The telegraph noise is generated by applying both a magnetic field and an electric current, whose forces on the DW oppose each other. Cumulating the DW depinning probability experimentally revealed that the DW depinning was governed by a single energy barrier, whose height was estimated to be about 1.0 x 10(-19) J. The ST efficiency at the pinning site is estimated to be -4.6 x 10(-14) T center dot m(2)/A. The present analysis technique provides an alternative way to determine the ST efficiency in the short-current-pulse-driven DW motion at a single energy barrier. English KOREAN PHYSICAL SOC Determination of the energy barrier and spin torque efficiency based on telegraph noise Article 10.3938/jkps.65.1607 1 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.65, no.10, pp.1607 - 1610 JOURNAL OF THE KOREAN PHYSICAL SOCIETY 65 10 1607 1610 scie scopus kci ART001931712 000346047000024 2-s2.0-84914671491 Physics, Multidisciplinary Physics Article DOMAIN-WALL Domain wall Depinning Energy barrier Telegraph noise Current pulse