Combined neutron and synchrotron studies of magnetic films |
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Authors: | Sunil K Sinha S Roy M R Fitzsimmons S Park M Dorn O Petracic I V Roshchin Zhi Pan Li X Batlle R Morales A Misra X Zhang K Chesnel J B Kortright Ivan K Schuller |
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Institution: | 1. Department of Physics, University of California at San Diego, 92093, La Jolla, CA, USA 2. Los Alamos National Laboratory, 87545, Los Alamos, NM, USA 3. Angewandte Physik, Universit?t Duisburg-Essent, 47048, Duisburg, Germany 4. Department de Fisica Fonamental, Universitat de Barcelona, 08028, Barcelona, Catalonia, Spain 5. Departamento de Fisica, Universidad de Oviedo, c/Calvo Sotel s/n, 33007, Oviedo, Spain 6. Lawrence Berkeley National Laboratory, 94720, Berkeley, CA, USA
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Abstract: | We discuss specular reflectivity and off-specular scattering of neutrons and X-rays from magnetic films. Both these techniques
are capable of providing information about the morphology of the chemical and magnetic roughness and the magnetic domain structure.
The use of neutrons with polarization analysis enables the spatial distribution of different vector components of the magnetization
to be determined, and the use of resonant magnetic X-ray scattering enables magnetization in a compound system to be determined
element-selectively. Thus both these methods provide powerful and complementary new probes for studying magnetism at the nanoscopic
level in a variety of systems such as those exhibiting exchange bias, giant magnetoresistance, spin injection, etc. We shall
illustrate with an example of both techniques applied to an exchange bias system consisting of a single crystal of antiferromagnetic
FeF2 capped with a ferromagnetic Co film, and discuss what has been learned about how exchange bias works in such a system. |
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Keywords: | Neutron reflectometry X-ray reflectometry magnetic films |
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