A Method of Operative Control of Instrumental Errors in Recording of the Reflectance Magnetic Circular Dichroism Spectra

Yu. V. Markin; Маркин Ю. В.; Z. E. Kun’kova; Кунькова З. Э.

doi:10.31857/S0032816223040031

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
Affiliations:
1. 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://freezetech.ru/0032-8162/article/view/670323
DOI: https://doi.org/10.31857/S0032816223040031
EDN: https://elibrary.ru/SUKMVE
ID: 670323

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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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