Flat dots

1. Magnetization dynamics of single curved nanomagnetsHolger Schmidt, University of California-Santa Cruz, DMR 0806924 Dense nanomagnet arrays hold promise for near-term applications such as data storage, memory, biosensors and others. Curved magnets offer unique magnetic properties and can be fabricated rapidly and cheaply using self-assembly. We are investigating the dynamic material properties of such nanomagnets in collaboration with U Chemnitz (Germany). Specifically, flat and curved nanodots of 100nm size show dramatically different magnetization dynamics. As seen on the right, the curved dots show a qualitatively richer spin wave spectrum with multiple modes. Micromagnetic simulations explain these findings and show mode-dependent areas of oscillation across the nanoelement. Flat dots Curved nanocaps 4 2 3 2 1 1 1 2 1 2 3 4

2. Magnetization dynamics of single curved nanomagnetsHolger Schmidt, University of California-Santa Cruz, DMR 0806924 A Broader impact on multiple levels: A: Exchange visit of US graduate student R. Brandt to collaborating university in Chemnitz, Germany. B: Guest lecture on nano-magnetism to UCSC graduate class by Dr. Bruce Terris from industrial collaborator HGST, San Jose. C: Hands-on demonstration of nanofabrication capabilities (dual beam electron/ion beam microscope) to COSMOS summer high school students by UCSC staff member R. Hoelle. B C