Magnetization relaxation in magnetically and sterically anisotropic nanocomposites
We propose static and stroboscopic polarized SANS measurements on magnetically and sterically anisotropic Janus nanoparticles. The aim of the experiment is to investigate the influence of shape anisotropy and exchange bias (induced by interaction of the FePt and MnO subunits of the hetero-dimers) on both the surface spin canting of the FePt domain and the magnetization relaxation of the particles subject to an oscillating magnetic field. The stroboscopic and static polarized SANS techniques are well exploited at the D22 instrument. As a result, we expect to gain precise information on the spin structure and magnetization dynamics in such anisotropic nanocomposites. This will be very valuable for future investigations on the coupling of different physical properties in Janus particles containing magnetic and polar subunits. The understanding of such fundamental nanomagnetic properties promises to contribute to the development of emerging multifunctional nanomaterials for future applications.
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DISCH Sabrina; PANTHOFER Martin; TREMEL Wolfgang and WIEDENMANN Albrecht. (2012). Magnetization relaxation in magnetically and sterically anisotropic nanocomposites. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-42-338
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