Sandig, O.; Herrero-Albillos, J.; Römer, F.M.; Friedenberger, N.; Kurde, J.; Noll, T.; Farle, M.; Kronast, F.: Imaging magnetic responses of nanomagnets by XPEEM. Journal of Electron Spectroscopy and Related Phenomena 185 (2012), p. 365-370
The Spin-resolved Photoelectron Emission Microscope (SPEEM) is a permanently installed set-up at Helmholtz-Zentrum Berlin (HZB). Due to its specific contrast it is mainly used for magnetic imaging and micro-spectroscopy with quantitative analysis. A crucial point in magnetic imaging is the application of magnetic fields. Many experiments require observation of magnetic responses or the preparation of a certain magnetic state during the measurement. We present a dedicated magnetic sample holder combining magnetic field during imaging with additional temperature control. This set-up enables SPEEM to measure magnetization curves of individual Fe nanocubes (18 nm)3 in size. If additionally alternating magnetic fields are applied we can image the local magnetic AC susceptibility (AC) as a function of temperature. The latter is ideally suited to visualize local variations of the Curie temperature (TC) in nanoand microstructures.