{"title":"A Method of Operative Control of Instrumental Errors in Recording of the Reflectance Magnetic Circular Dichroism Spectra","authors":"Yu. V. Markin, Z. E. Kun’kova","doi":"10.1134/S0020441223040036","DOIUrl":null,"url":null,"abstract":"<p>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” (<i>V</i><sub>=</sub>) and doubled (<i>V</i><sub>2<i>f</i></sub>) frequency <i>f</i> of the retardation modulation in crossed polarizers in the process of scanning over a spectrum. In these measurements, the constancy of the <i>V</i><sub>2<i>f</i></sub>/<i>V</i><sub>=</sub> 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.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":null,"pages":null},"PeriodicalIF":0.4000,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Instruments and Experimental Techniques","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0020441223040036","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
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.
我们介绍了一种在线控制反射光中磁性圆二色光谱数据可靠性的技术，该技术基于在光正常入射到样品上的情况下，使用光弹性调制器对光波进行相位调制的方法来测量极性磁光克尔效应。所介绍的技术包括在光谱扫描过程中，测量交叉偏振器中延迟调制的 "零"（V=）频率 f 和倍频（V2f）频率 f 的信号幅度。在这些测量中，整个光谱范围内 V2f/V= 比率的恒定性证实了光谱数据的可靠性。分析了可能导致记录的光谱形状失真的仪器误差。以测量 MnAs 薄膜的磁性圆二色光谱为例，说明了该技术的可操作性和效率。
期刊介绍：
Instruments and Experimental Techniques is an international peer reviewed journal that publishes reviews describing advanced methods for physical measurements and techniques and original articles that present techniques for physical measurements, principles of operation, design, methods of application, and analysis of the operation of physical instruments used in all fields of experimental physics and when conducting measurements using physical methods and instruments in astronomy, natural sciences, chemistry, biology, medicine, and ecology.
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