title: Domain wall pinning in FeCoCu bamboo-like nanowires.
abstract: The three dimensional nature of cylindrical magnetic nanowires has opened a new way to control the domain configuration as well as the magnetization reversal process. The pinning effect of the periodic diameter modulations on the domain wall propagation in FeCoCu individual nanowires is determined by Magnetic Force Microscopy, MFM. A main bistable magnetic configuration is firstly concluded from MFM images characterized by the spin reversal between two nearly single domain states with opposite axial magnetization. Complementary micromagnetic simulations confirm a vortex mediated magnetization reversal process. A non-standard variable field MFM imaging procedure allows us to observe metastable magnetic states where the propagating domain wall is pinned at certain positions with enlarged diameter. Moreover, it is demonstrated that it is possible to control the position of the pinned domain walls by an external magnetic field.
authors.affiliation: Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, 28049, Spain.
authors.forename: Eider
authors.initials: E
authors.lastname: Berganza
authors.affiliation: Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, 28049, Spain.
authors.forename: Cristina
authors.initials: C
authors.lastname: Bran
authors.affiliation: Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, 28049, Spain.
authors.forename: Miriam
authors.initials: M
authors.lastname: Jaafar
authors.affiliation: Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, 28049, Spain.
authors.forename: Manuel
authors.initials: M
authors.lastname: Vázquez
authors.affiliation: Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, 28049, Spain.
authors.forename: Agustina
authors.initials: A
authors.lastname: Asenjo