Title :
Magnetic properties of large-area particle arrays fabricated using block copolymer lithography
Author :
Cheng, Joy Y. ; Ross, C.A. ; Thomas, E.L. ; Smith, Henry I. ; Lammertink, R.G.H. ; Vancso, G.J.
Author_Institution :
Dept. of Mater. Sci. & Eng., MIT, Cambridge, MA, USA
fDate :
9/1/2002 12:00:00 AM
Abstract :
50-nm period arrays of Co particles with widths of 35 nm and heights of 5-20 nm have been made using a self-assembled block copolymer lithography. The magnetic particles have in-plane anisotropy due to their shape, and show thermally activated reversal with an activation volume larger than their physical volume, which is attributed to magnetic interactions between the particles.
Keywords :
arrays; cobalt; ferromagnetic materials; ion beam lithography; magnetic anisotropy; magnetic particles; magnetisation reversal; nanostructured materials; nanotechnology; polymer blends; self-assembly; sputter etching; 35 nm; 5 to 20 nm; 50 nm; Co; Co particles; activation volume; in-plane anisotropy; large-area particle arrays; magnetic dot arrays; magnetic interactions; magnetic particles; magnetic properties; nanoscale magnetic particles; period arrays; physical volume; self-assembled block copolymer lithography; shape; thermally activated reversal; Cobalt; Etching; Lithography; Magnetic particles; Magnetic properties; Materials science and technology; Nanoparticles; Polymers; Self-assembly; Shape;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.801926
