Imaging magnetic responses of nanomagnets by XPEEM |
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| Authors: | O. Sandig,J. Herrero-Albillos,F.M. Rö mer,N. Friedenberger,J. Kurde,T. Noll,M. Farle,F. Kronast |
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| Affiliation: | 1. Helmholtz Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489 Berlin, Germany;2. Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany;3. Universität Duisburg-Essen, Lotharstr.1, 47048 Duisburg, Germany;4. Centro Universitario de la Defensa, Ctra. de Huesca s/n, E-50090 Zaragoza, Spain;5. Instituto de Ciencia de Materiales de Aragón and Departamento de Física de la Materia Condensada, CSIC - Universidad de Zaragoza, Pedro Cerbuna 12, E-50009 Zaragoza, Spain |
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| Abstract: | 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 (χAC) as a function of temperature. The latter is ideally suited to visualize local variations of the Curie temperature (TC) in nano- and microstructures. |
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| Keywords: | XPEEM Magnetic nanostructures Microscopy Magnetic susceptibility |
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