Soft X-Ray Circular Polarizer Using Magnetic Circular Dichroism at the Fe L{sub 3} line

Journal Article · Thu May 01 04:00:00 EDT 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.119932· OSTI ID:773642

Kortright, J B ^[1]; Kim, S K; Warwick, T; Smith, N V

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1. LBNL Library

Linearly polarized soft x-rays are converted to elliptical polarization at the Fe L{sub 3} line (707 eV) using magnetic circular dichroism (MCD) on transmission through thin Fe films. A linear polarizer measured the transmitted polarization at different incidence angles to vary as expected from a model for in-plane magnetization, and also to exhibit a weak MCD effect at normal incidence interpreted to originate from perpendicular interface anisotropy. An MCD signal from a downstream Fe film was produced by switching the helicity of x-rays transmitted through an upstream circular polarizer. Practical considerations for optimizing the production of circular polarization are discussed, and synchrotron radiation applications using these circular polarizing filters are suggested.

• Research Organization: Lawrence Berkeley National Lab., CA (US); Advanced Light Source (US)
• Sponsoring Organization: USDOE Director, Office of Energy Research (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 773642
• Report Number(s): LBNL--40311; LBNL/ALS--726
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 11 Vol. 71; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ADVANCED LIGHT SOURCE
ADVANCED LIGHT SOURCE ALS
ANISOTROPY
HELICITY
INCIDENCE ANGLE
IRON
MAGNETIC CIRCULAR DICHROISM
MAGNETIZATION
POLARIZATION
SOFT X RADIATION