Microscopic Origin of Interfacial Dzyaloshinskii-Moriya Interaction [article]

Sanghoon Kim, Kohei Ueda, Gyungchoon Go, Peong-Hwa Jang, Kyung-Jin Lee, Abderrezak Belabbes, Aurelien Manchon, Motohiro Suzuki, Yoshinori Kotani, Tetsuya Nakamura, Kohji Nakamura, Tomohiro Koyama (+5 others)
2017 arXiv   pre-print
Chiral spin textures at the interface between ferromagnetic and heavy nonmagnetic metals, such as Neel-type domain walls and skyrmions, have been studied intensively because of their great potential for future nanomagnetic devices. The Dyzaloshinskii-Moriya interaction (DMI) is an essential phenomenon for the formation of such chiral spin textures. In spite of recent theoretical progress aiming at understanding the microscopic origin of the DMI, an experimental investigation unravelling the
more » ... ics at stake is still required. Here, we experimentally demonstrate the close correlation of the DMI with the anisotropy of the orbital magnetic moment and with the magnetic dipole moment of the ferromagnetic metal. The density functional theory and the tight-binding model calculations reveal that asymmetric electron occupation in orbitals gives rise to this correlation.
arXiv:1704.02900v1 fatcat:m4lsku64mjhbpkqmnmlgiwuj5y