Speaker: Peter Fischer (LBNL, UCSC)
Program Description
The era of nanomagnetism, which aims to understanding and controlling magnetic properties and behavior on the nanoscale, is currently expanding into the mesoscale [1], which will harness complexity and novel functionalities, which are essential parameters to meet future challenges in terms of speed, size and energy efficiency of spin driven devices. Multimodal characterization techniques, such as tomographic magnetic imaging and investigations of spin dynamics down to fundamental magnetic length and time scales with elemental sensitivity in emerging multi-component materials will enable future scientific breakthroughs. I will review recent developments with full-field magnetic soft x-ray transmission microscopy [2] to study spin configurations in magnetic nanotubes [3], the stochastic behavior in vortices [4] and the local distribution of magnetic properties near domain walls [5].
This work was supported by the Director, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, of the U.S. Department of Energy under Contract No. DE-AC02-05-CH1123 and by the Leading Foreign Research Institute Recruitment Program (Grant No. 2012K1A4A3053565) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MEST).
References
[1] R. Service, Science 335 1167 (2012)
[2] P. Fischer, Materials Science & Engineeering R72 81-95 (2011)
[3] M.-Y. Im, et al., Nature Communications (2014) in print
[4] R. Streubel, Adv. Mater 26 316 (2014)
[5] M.J. Robertson, et al., J Appl Phys (2014) submitted.
