Quadratic magnetooptic spectroscopy setup based on photoelastic light modulation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F18%3A10240002" target="_blank" >RIV/61989100:27640/18:10240002 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27740/18:10240002 RIV/00216208:11320/18:10387807

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1569441017303693?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1569441017303693?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.photonics.2018.05.007" target="_blank" >10.1016/j.photonics.2018.05.007</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Quadratic magnetooptic spectroscopy setup based on photoelastic light modulation

Popis výsledku v původním jazyce

In most of the cases the magnetooptic Kerr effect (MOKE) techniques rely solely on the effects linear in magnetization (M). Nevertheless, a higher-order term being proportional to M-2 and called quadratic MOKE (QMOKE) can additionally contribute to experimental data. Handling and understanding the underlying origin of QMOKE could be the key to utilize this effect for investigation of antiferromagnetic materials in the future due to their vanishing first order MOKE contribution. Also, better understanding of QMOKE and hence better understanding of magnetooptic (MO) effects in general is very valuable, as the MO effect is very much employed in research of ferro- and ferrimagnetic materials. Therefore, we present our QMOKE and longitudinal MOKE spectroscopy setup with a spectral range of 0.8-5.5 eV. The setup is based on light modulation through a photoelastic modulator and detection of second-harmonic intensity by a lock-in amplifier. To measure the Kerr ellipticity an achromatic compensator is used within the setup, whereas without it Kerr rotation is measured. The separation of QMOKE spectra directly from the measured data is based on measurements with multiple magnetization directions. So far the QMOKE separation algorithm is developed and tested for but not limited to cubic (001) oriented samples. The QMOKE spectra yielded by our setup arise from two quadratic MO parameters G(s) and 2G(44), being elements of quadratic MO tensor G, which describes perturbation of the permittivity tensor in the second order in M.

Název v anglickém jazyce

Quadratic magnetooptic spectroscopy setup based on photoelastic light modulation

Popis výsledku anglicky

In most of the cases the magnetooptic Kerr effect (MOKE) techniques rely solely on the effects linear in magnetization (M). Nevertheless, a higher-order term being proportional to M-2 and called quadratic MOKE (QMOKE) can additionally contribute to experimental data. Handling and understanding the underlying origin of QMOKE could be the key to utilize this effect for investigation of antiferromagnetic materials in the future due to their vanishing first order MOKE contribution. Also, better understanding of QMOKE and hence better understanding of magnetooptic (MO) effects in general is very valuable, as the MO effect is very much employed in research of ferro- and ferrimagnetic materials. Therefore, we present our QMOKE and longitudinal MOKE spectroscopy setup with a spectral range of 0.8-5.5 eV. The setup is based on light modulation through a photoelastic modulator and detection of second-harmonic intensity by a lock-in amplifier. To measure the Kerr ellipticity an achromatic compensator is used within the setup, whereas without it Kerr rotation is measured. The separation of QMOKE spectra directly from the measured data is based on measurements with multiple magnetization directions. So far the QMOKE separation algorithm is developed and tested for but not limited to cubic (001) oriented samples. The QMOKE spectra yielded by our setup arise from two quadratic MO parameters G(s) and 2G(44), being elements of quadratic MO tensor G, which describes perturbation of the permittivity tensor in the second order in M.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Photonics and Nanostructures - Fundamentals and Applications

ISSN

1569-4410

e-ISSN

—

Svazek periodika

31

Číslo periodika v rámci svazku

Kveten

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

60-65

Kód UT WoS článku

000445716900008

EID výsledku v databázi Scopus

2-s2.0-85047795539