Portal de Periódicos da CAPES

Magnetization reversal of individual nanowires with controlled defects

2002; American Institute of Physics; Volume: 91; Issue: 10 Linguagem: Inglês

10.1063/1.1452253

1520-8850

Andrei Sokolov, Renat Sabirianov, Wolfgang Wernsdorfer, Bernard Doudin,

Surface and Thin Film Phenomena

Low temperature magnetization reversal measurements were performed on individual permalloy nanowires of diameters between 30 and 60 nm. During the electrochemical growth of the wire, a defect was induced by a short pulse in the deposition potential modifying locally the microstructure and composition. Magnetic measurements performed with micro-superconducting quantum interference devices were performed. The angular dependence of switching field revealed significant deviations from classical predictions. For specific angles, magnetization curves indicate a reversal occurring in two steps.