Is magnetic chiral dichroism feasible with electron vortices?

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• 作者：P. Schattschneider ; S. L枚ffler ; M. St枚ger-Pollach ; J. Verbeeck
• 关键词：Orbital angular momentum ; Electron vortices ; EMCD ; Inelastic scattering
• 刊名：Ultramicroscopy
• 出版年：January, 2014
• 年：2014
• 卷：136
• 期：Complete
• 页码：81-85
• 全文大小：2784 K

文摘

We discuss the feasibility of detecting magnetic transitions with focused electron vortex probes, suggested by selection rules for the magnetic quantum number. We theoretically estimate the dichroic signal strength in the L_2,3 edge of ferromagnetic d metals. It is shown that under realistic conditions, the dichroic signal is undetectable for nanoparticles larger than . This is confirmed by a key experiment with nanometer-sized vortices.