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Download Imaging of local magnetic structure by polarized neutron holography
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Transcript
Imaging of local magnetic structure by polarized neutron holography A. Szakál Wigner Research Centre for Physics, Budapest, Hungary E-mail: [email protected] Atomic resolution holography is an emerging technique for investigation of the structure of materials on atomic scale. Using this method questions concerning the local arrangement of nuclei around a specific nucleus can be answered but discovering the local spin arrangement around a specific (e.g. impurity) nucleus is still a challenging problem. Neutrons possess magnetic moment and therefore they are candidates for holographic mapping of local magnetic structure but until the present time no model calculation has been done to describe the expected magnetic hologram. A model of a magnetic hologram is hereby presented taking into account the magnetic interaction between neutrons and magnetic atoms. Particular features of the hologram are discussed and a method to reconstruct the components of the magnetic moments in the sample is provided. The proposed method opens the way to image the local magnetic field inside the sample on atomic scale.
