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

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Рұқсат ақылы немесе тек жазылушылар үшін

Аннотация

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.

Авторлар туралы

Yu. Markin

Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences (Fryazino Branch)

Email: markin@fireras.su
141190, Fryazino, Moscow oblast, Russia

Z. Kun’kova

Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences (Fryazino Branch)

Хат алмасуға жауапты Автор.
Email: markin@fireras.su
141190, Fryazino, Moscow oblast, Russia

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© Ю.В. Маркин, З.Э. Кунькова, 2023