Fabrication Polystyrene spheres (PS) as etching masks on thin films

1. Co/Pt Nanodots with Perpendicular Magnetic AnisotropyChia-Ling Chien, Johns Hopkins University, DMR 0403849 MFM Images Co/Pt nanodots with either up or down domains SEM Micrographs Co/Pt nanodots with sizes 100 nm to 600 nm Enhanced Coercivity up to 5 times larger Magnetic thin films with perpendicular magnetic anisotropy (PMA) have special attributes for scientific explorations and technological applications. We have developed a nanosphere lithography for making nanodots with PMA with sizes as small as 100 nm. Fabrication Polystyrene spheres (PS) as etching masks on thin films F. Q. Zhu, Z. Shang, D. Monet, and C. L. Chien, “Large enhancement of coercivity of magnetic Co/Pt nanodots with perpendicular anisotropy,” J. Appl. Phys. 101, 09J101 (2007).

2. The Smallest Beethoven’s Music Ever Written (by E. Schmidt)Chia-Ling Chien, Johns Hopkins University, DMR 0403849 2 µm 50 µm Beethoven’s 5th Symphony, opening bars Same music written by E. Schmidt using FIB Erik. Schmidt, an intern from Mt. Hebron High School, used the focused ion beam (FIB) to “write” the smallest Beethoven’s music ever written during July 2007. The FIB pattern (above right) of the opening bar of Beethoven’s 5th symphony is only 2 µm in width. The melody of the entire first movement of the 5th symphony could be written using FIB over the cross section of one Beethoven’s hair.