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arXiv · 0910.1290

Influence of plural scattering on the quantitative determination of spin and orbital moments in electron magnetic circular dichroism measurements

Jan Rusz·Hans Lidbaum·Stefano Rubino·Bjorgvin Hjorvarsson·Peter M. Oppeneer·Olle Eriksson·Klaus Leifer
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Abstract

Recent quantitative measurements of the orbital to spin magnetic moment ratio $m_L/m_S$ in electron magnetic circular dichroism (EMCD) experiments have given a $m_L/m_S$ ratio that is larger than commonly accepted values. We demonstrate here that plural scattering may noticeably influence the $m_L/m_S$ ratio. An equation is derived which describes its influence as a function of the spectral integrals of the plasmon scattering region and zero-loss peak. The influence of the electron-plasmon scattering can be removed when electron energy-loss spectra of the ionization edge are deconvoluted by the low-loss signal. For a bcc-Fe sample we obtain $m_L/m_S=0.04$ after plasmon removal. We conclude that the plural scattering should be considered when extracting quantitative information from EMCD measurements.

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Jan Rusz, Hans Lidbaum, Stefano Rubino, Bjorgvin Hjorvarsson, Peter M. Oppeneer, Olle Eriksson, Klaus Leifer. 2009-10-07. Influence of plural scattering on the quantitative determination of spin and orbital moments in electron magnetic circular dichroism measurements. https://arxiv.org/abs/0910.1290

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