Synthesis and magnetism of modulated FeCo-based nanowires

International Conference on Recent Trends in Physics 2016

Palmero, Ester M.^1 ; Bran, Cristina^1 ; Del Real, Rafael P.^1 ; Vázquez, Manuel^1

Institute of Materials Science of Madrid, CSIC, Madrid

28049, Spain^1

关键词: Coercivity and remanences;    Domain-wall pinning;    Electrochemical techniques;    Hard magnetic property;    High density magnetic storage;    Magnetic nanowires;    Magnetization reversal process;    Vortex domain wall;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/755/1/012001/pdf
DOI  :  10.1088/1742-6596/755/1/012001

来源: IOP

【 摘 要 】

FeCo based nanowire arrays have been proposed for different applications as high-density magnetic storage or sprintronics. Depending on the application different magnetic properties are required and the electrochemical techniques are low-cost routes to tailor them, by tuning the nanowires composition and geometry. In this work two different types of nanowires are studied: multisegmented nanowires and nanowires with modulated diameter. The magnetic properties of multisegmented [FeCoCu(y)/Cu(x)]10nanowire arrays have been studied considering different Cu layer thicknesses (x) and FeCoCu segment lengths (y). The obtained results show that the hard magnetic properties of these nanowire arrays present a higher coercivity and remanence comparing to the continuous nanowires, for thicker Cu layers and shorter FeCoCu segments. On the other hand, for the nanowires with modulated diameter it has been stated that the magnetization reversal process takes place by a vortex domain wall and with the tailored modulations along the nanowire it is possible to induce the domain wall pinning. This opens the possibility of controlling the domain wall motion along magnetic nanowires.