title: Tailoring Staircase-like Hysteresis Loops in Electrodeposited Trisegmented Magnetic Nanowires: a Strategy toward Minimization of Interwire Interactions.
abstract: A new strategy to minimize magnetic interactions between nanowires (NWs) dispersed in a fluid is proposed. Such a strategy consists of preparing trisegmented NWs containing two antiparallel ferromagnetic segments with dissimilar coercivity separated by a nonmagnetic spacer. The trisegmented NWs exhibit a staircase-like hysteresis loop with tunable shape that depends on the relative length of the soft- and hard-magnetic segments and the respective values of saturation magnetization. Such NWs are prepared by electrodepositing CoPt/Cu/Ni in a polycarbonate (PC) membrane. The antiparallel alignment is set by applying suitable magnetic fields while the NWs are still embedded in the PC membrane. Analytic calculations are used to demonstrate that the interaction magnetic energy from fully compensated trisegmented NWs with antiparallel alignment is reduced compared to a single-component NW with the same length or the trisegmented NWs with the two ferromagnetic counterparts parallel to each other. The proposed approach is appealing for the use of magnetic NWs in certain biological or catalytic applications where the aggregation of NWs is detrimental for optimized performance.
authors.affiliation: Departament de Fı́sica, Universitat Autònoma de Barcelona , Bellaterra, E-08193 Barcelona, Catalonia, Spain.
authors.forename: Jin
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Departament de Fı́sica, Universitat Autònoma de Barcelona , Bellaterra, E-08193 Barcelona, Catalonia, Spain.
authors.forename: Sebastià
authors.initials: S
authors.lastname: Agramunt-Puig
authors.affiliation: Departament de Fı́sica, Universitat Autònoma de Barcelona , Bellaterra, E-08193 Barcelona, Catalonia, Spain.
authors.forename: Núria
authors.initials: N
authors.lastname: Del-Valle
authors.affiliation: Departament de Fı́sica, Universitat Autònoma de Barcelona , Bellaterra, E-08193 Barcelona, Catalonia, Spain.
authors.forename: Carles
authors.initials: C
authors.lastname: Navau
authors.affiliation: Departament de Fı́sica, Universitat Autònoma de Barcelona , Bellaterra, E-08193 Barcelona, Catalonia, Spain.
authors.forename: Maria D
authors.initials: MD
authors.lastname: Baró
authors.affiliation: LENS, MIND-IN2UB, Departament d'Electrònica, Universitat de Barcelona , Martí i Franquès 1, E-08028 Barcelona, Spain.
authors.forename: Sònia
authors.initials: S
authors.lastname: Estradé
authors.affiliation: LENS, MIND-IN2UB, Departament d'Electrònica, Universitat de Barcelona , Martí i Franquès 1, E-08028 Barcelona, Spain.
authors.forename: Francesca
authors.initials: F
authors.lastname: Peiró
authors.affiliation: Institute of Robotics & Intelligent Systems (IRIS), ETH Zürich , CH-8092 Zurich, Switzerland.
authors.forename: Salvador
authors.initials: S
authors.lastname: Pané
authors.affiliation: Institute of Robotics & Intelligent Systems (IRIS), ETH Zürich , CH-8092 Zurich, Switzerland.
authors.forename: Bradley J
authors.initials: BJ
authors.lastname: Nelson
authors.affiliation: Departament de Fı́sica, Universitat Autònoma de Barcelona , Bellaterra, E-08193 Barcelona, Catalonia, Spain.
authors.forename: Alvaro
authors.initials: A
authors.lastname: Sanchez
authors.affiliation: Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology , Campus UAB, Bellaterra, 08193 Barcelona, Spain.|Institució Catalana de Recerca i Estudis Avançats (ICREA) , Barcelona, Catalonia, Spain.
authors.forename: Josep
authors.initials: J
authors.lastname: Nogués
authors.affiliation: Departament de Fı́sica, Universitat Autònoma de Barcelona , Bellaterra, E-08193 Barcelona, Catalonia, Spain.
authors.forename: Eva
authors.initials: E
authors.lastname: Pellicer
authors.affiliation: Departament de Fı́sica, Universitat Autònoma de Barcelona , Bellaterra, E-08193 Barcelona, Catalonia, Spain.|Institució Catalana de Recerca i Estudis Avançats (ICREA) , Barcelona, Catalonia, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Sort
keywords: magnetic interactions; nanomagnetism; segmented nanowires; staircase hysteresis loops; template-assisted electrodeposition