Magnetic specular reflectivity, i.e., the difference in reflectivity for opposite helicities
of CP x-rays measured at resonance, probes the element-specific magnetization density profile.
The figure shows specular reflectivity (top) and magnetic specular reflectivity
(bottom) data measured on a [Gd/Fe]15 multilayer at the Gd L2 resonance (E=7929 eV) and T=300K. Top inset
shows the scattering geometry and bottom inset shows the derived magnetic structure of the Gd layers, including
charge and magnetic roughness. Although bulk Gd is paramagnetic at 300K, a 4.1(7)Å region near
the Gd/Fe interface remains fully magnetized due to its contact interaction with magnetized Fe at the
interface. [Phys. Rev. Lett. 87, 207201 (2001)]
Local Contact: Daniel Haskel (
haskel@aps.anl.gov)
|
 |
|
