Direct observation of the Dzyaloshinskii-Moriya interaction in a Pt/Co/Ni film

Autor:	Di, Kai, Zhang, Vanessa Li, Lim, Hock Siah, Ng, Ser Choon, Kuok, Meng Hau, Yu, Jiawei, Yoon, Jungbum, Qiu, Xuepeng, Yang, Hyunsoo
Rok vydání:	2014
Předmět:	Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. Lett. 114, 047201 (2015)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.114.047201
Popis:	The interfacial Dzyaloshinskii-Moriya interaction (DMI) in an in-plane anisotropic Pt(4nm)/Co(1.6nm)/Ni(1.6nm) film has been directly observed by Brillouin spectroscopy. It is manifested in the asymmetry of the measured magnon dispersion relation, from which the DMI constant has been evaluated. Linewidth measurements reveal that the lifetime of the magnons is asymmetric with respect to their counter-propagating directions. The lifetime asymmetry is dependent on the magnon frequency, being more pronounced the higher the frequency. Analytical calculations of the magnon dispersion relation and linewidth agree well with experiments. Comment: 15 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1409.8570 Zobrazit plný text záznamu View this record from Arxiv