title: Novel chiral magnetic domain wall structure in Fe/Ni/Cu(001) films.
abstract: Using spin-polarized low energy electron microscopy, we discovered a new type of domain wall structure in perpendicularly magnetized Fe/Ni bilayers grown epitaxially on Cu(100). Specifically, we observed unexpected Néel-type walls with fixed chirality in the magnetic stripe phase. Furthermore, we find that the chirality of the domain walls is determined by the film growth order with the chirality being right handed in Fe/Ni bilayers and left handed in Ni/Fe bilayers, suggesting that the underlying mechanism is the Dzyaloshinskii-Moriya interaction at the film interfaces. Our observations may open a new route to control chiral spin structures using interfacial engineering in transition metal heterostructures.
authors.affiliation: Department of Physics, State Key Laboratory of Surface Physics, Center for Spintronic Devices and Applications, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: G
authors.initials: G
authors.lastname: Chen
authors.forename: J
authors.initials: J
authors.lastname: Zhu
authors.forename: A
authors.initials: A
authors.lastname: Quesada
authors.forename: J
authors.initials: J
authors.lastname: Li
authors.forename: A T
authors.initials: AT
authors.lastname: N'Diaye
authors.forename: Y
authors.initials: Y
authors.lastname: Huo
authors.forename: T P
authors.initials: TP
authors.lastname: Ma
authors.forename: Y
authors.initials: Y
authors.lastname: Chen
authors.forename: H Y
authors.initials: HY
authors.lastname: Kwon
authors.forename: C
authors.initials: C
authors.lastname: Won
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Qiu
authors.forename: A K
authors.initials: AK
authors.lastname: Schmid
authors.forename: Y Z
authors.initials: YZ
authors.lastname: Wu