X‐ray magnetic circular dichroism with tunable polarization helicity | Zendy

Varga L. | Zendy; Giles C. | Zendy; Zheng Y. L. | Zendy; Pizzini S. | Zendy; De Bergevin F. | Zendy; Fontaine A. | Zendy; Malgrange C. | Zendy

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X‐ray magnetic circular dichroism with tunable polarization helicity

Author(s) -

Varga L.,

Giles C.,

Zheng Y. L.,

Pizzini S.,

De Bergevin F.,

Fontaine A.,

Malgrange C.

Publication year - 1999

Publication title -

journal of synchrotron radiation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.172

H-Index - 99

ISSN - 1600-5775

DOI - 10.1107/s0909049599011267

Subject(s) - helicity , magnetic circular dichroism , polarization (electrochemistry) , optics , circular polarization , magnetic field , physics , x ray magnetic circular dichroism , diffraction , spectral line , materials science , nuclear magnetic resonance , chemistry , quantum mechanics , microstrip , particle physics , astronomy

X‐ray magnetic circular dichroism spectra have previously been obtained by switching the polarization helicity with a diamond quarter‐wave plate (QWP) and keeping the applied magnetic field on the sample as an independent variable [Giles, Malgrange, Goulon, de Bergevin, Vettier, Fontaine, Dartyge & Pizzini (1994). Nucl. Instrum. Methods , A 349 , 622–625]. These results were obtained by subtracting an undesirable non‐magnetic residual spectrum. Experiments reported here show that this residual spectrum mainly originates from a slight lateral displacement of the forward‐diffracted beam in the QWP. A quantitative analysis of the phenomenon is in good agreement with predictions from X‐ray dynamical theory.

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