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Proceedings Paper

Polarized x-ray absorption spectroscopy for the study of superconductors and magnetic materials
Author(s): Mohan Ramanathan; Ercan E. Alp; Susan M. Mini; Said-Salem Sugui Jr.; A. Bommannavar
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Paper Abstract

Synchrotron radiation is a good source of polarized radiation in the x-ray regime. The radiation obtained from a bending magnet source is linearly polarized in the bending plane and has a varying degree of circular polarization away from the bending plane. This feature of synchrotron radiation can be taken advantage of with proper optics to selectively use the type of polarized radiation required for the experiment in question. Linear polarized radiation is used to study the anisotropic nature of electronic and atomic structure by x-ray absorption techniques from single crystal and oriented powder samples. We will give a specific example of the use of linearly polarized x-ray absorption spectroscopy measurements for the study of the magnetically oriented layered copper oxide superconductors. While such linear dichroism measurements help identify the symmetry of the empty electronic states, circular dichroism measurements in magnetic systems help in determining the spin contribution to the absorption process. We will discuss magnetic circular dichroism measurements of the ordered-disordered invar alloy Fe3Pt.

Paper Details

Date Published: 1 November 1991
PDF: 11 pages
Proc. SPIE 1548, Production and Analysis of Polarized X Rays, (1 November 1991); doi: 10.1117/12.50582
Show Author Affiliations
Mohan Ramanathan, Argonne National Lab. (United States)
Ercan E. Alp, Argonne National Lab. (United States)
Susan M. Mini, Argonne National Lab. (United States)
Said-Salem Sugui Jr., Argonne National Lab. (United States)
A. Bommannavar, Brooklyn College/CUNY (United States)

Published in SPIE Proceedings Vol. 1548:
Production and Analysis of Polarized X Rays
D. Peter Siddons, Editor(s)

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