A Method of Operative Control of Instrumental Errors in Recording of the Reflectance Magnetic Circular Dichroism Spectra
- Authors: Markin Y.V.1, Kun’kova Z.E.1
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Affiliations:
- Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences (Fryazino Branch)
- Issue: No 6 (2023)
- Pages: 74-84
- Section: ОБЩАЯ ЭКСПЕРИМЕНТАЛЬНАЯ ТЕХНИКА
- URL: https://rjsvd.com/0032-8162/article/view/670323
- DOI: https://doi.org/10.31857/S0032816223040031
- EDN: https://elibrary.ru/SUKMVE
- ID: 670323
Cite item
Abstract
We describe a technique for online control of the reliability of the data of magnetic circular dichroism spectroscopy in reflected light, which is based on measuring the polar magneto-optical Kerr effect under normal incidence of light on a sample with a method of phase modulation of a light wave using a photoelastic modulator. The presented technique involves measuring the amplitudes of signals at the “zero” (V=) and doubled (V2f) frequency f of the retardation modulation in crossed polarizers in the process of scanning over a spectrum. In these measurements, the constancy of the V2f/V= ratio over the entire spectral range confirms the reliability of the spectroscopy data. The possible instrumental errors that lead to a distortion of the recorded spectrum shape were analyzed. The operability and efficiency of the technique is illustrated by an example of measuring the magnetic circular dichroism spectrum of a MnAs film.
About the authors
Yu. V. Markin
Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences (Fryazino Branch)
Email: markin@fireras.su
141190, Fryazino, Moscow oblast, Russia
Z. E. Kun’kova
Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences (Fryazino Branch)
Author for correspondence.
Email: markin@fireras.su
141190, Fryazino, Moscow oblast, Russia
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