Magnetic antidot to dot crossover in Co and Py nanopatterned thin films

作者：Castan Guerrero C^*; Herrero Albillos J; Bartolome J; Bartolome F; Rodriguez L A; Magen C; Kronast F; Gawronski P; Chubykalo Fesenko O; Merazzo K J; Vavassori P; Strichovanec P; Sese J; Garcia L M

来源：Physical Review B, 2014, 89(14): 144405.

DOI：10.1103/PhysRevB.89.144405

The crossover from antidot to dot magnetic behavior on arrays patterned in a ferromagnetic thin film has been achieved by modifying only the geometry. A series of antidot arrays has been fabricated on cobalt with fixed diameter d and by reducing the period of the array p from p %26gt;%26gt; d top %26lt; d. A dramatic change in the coercivity dependence with p, correlated with a significant modification in the magnetic domain structure observed by x-ray photoemission electron microscopy, evidences the crossover. An intermediate regime has been found between the superdomain structure present in antidot arrays and the array of astroid-state noncorrelated dots. The study has been reproduced for a different ferromagnetic material, permalloy, and supported by micromagnetic simulations.

• 出版日期2014-4-4