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

0437604 - FZÚ 2015 RIV US eng J - Journal Article
Rusz, Ján - Lidbaum, H. - Rubino, S. - Hjörvarsson, B. - Oppeneer, P.M. - Eriksson, O. - Leifer, K.
Influence of plural scattering on the quantitative determination of spin and orbital moments in electron magnetic chiral dichroism measurements.
Physical Review. B. Roč. 83, č. 13 (2011), "132402-1"-"132402-4". ISSN 1098-0121
Institutional research plan: CEZ:AV0Z10100521
Keywords : EMCD experiments
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.691, year: 2011

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.
Permanent Link: http://hdl.handle.net/11104/0241125