Scaling of quadratic and linear magneto-optic Kerr effect spectra with L2(1) ordering of Co2MnSi Heusler compound

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F20%3A10245213" target="_blank" >RIV/61989100:27640/20:10245213 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27740/20:10245213 RIV/00216208:11320/20:10414407

Výsledek na webu

<a href="https://aip.scitation.org/doi/10.1063/5.0008427" target="_blank" >https://aip.scitation.org/doi/10.1063/5.0008427</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0008427" target="_blank" >10.1063/5.0008427</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Scaling of quadratic and linear magneto-optic Kerr effect spectra with L2(1) ordering of Co2MnSi Heusler compound

Popis výsledku v původním jazyce

Spectral ellipsometry is a useful technique allowing fast, nondestructive, and contactless characterization of thin films and constituent materials. In this Letter, we show that both the linear magneto-optic Kerr effect (LinMOKE, proportional to the magnetization M) and the quadratic MOKE (QMOKE, proportional to M 2) can be a useful extension of spectral ellipsometry and are able to sense the crystallographic ordering of Heusler compounds. This is demonstrated for the Heusler compound Co2MnSi, which has a crystallographic transition from a B2 to an L2(1) structure with increasing annealing temperature T-a. We investigated a set of Co2MnSi thin films deposited on MgO(001) substrates and annealed from 300 to 500 degrees C. The amplitude of LinMOKE and QMOKE spectra, detected in the extended visible spectral range of 0.8-5.5eV, scales linearly with T-a, and this effect is pronounced at the resonant peaks of the QMOKE spectra below 2.0eV. Furthermore, the spectra of the magneto-optic (MO) parameters, which fully describe the MO response of Co2MnSi up to the second order in M, are obtained depending on T-a. Finally, the spectra are compared with ab initio calculations of a purely L2(1)-ordered Co2MnSi Heusler compound.

Název v anglickém jazyce

Scaling of quadratic and linear magneto-optic Kerr effect spectra with L2(1) ordering of Co2MnSi Heusler compound

Popis výsledku anglicky

Spectral ellipsometry is a useful technique allowing fast, nondestructive, and contactless characterization of thin films and constituent materials. In this Letter, we show that both the linear magneto-optic Kerr effect (LinMOKE, proportional to the magnetization M) and the quadratic MOKE (QMOKE, proportional to M 2) can be a useful extension of spectral ellipsometry and are able to sense the crystallographic ordering of Heusler compounds. This is demonstrated for the Heusler compound Co2MnSi, which has a crystallographic transition from a B2 to an L2(1) structure with increasing annealing temperature T-a. We investigated a set of Co2MnSi thin films deposited on MgO(001) substrates and annealed from 300 to 500 degrees C. The amplitude of LinMOKE and QMOKE spectra, detected in the extended visible spectral range of 0.8-5.5eV, scales linearly with T-a, and this effect is pronounced at the resonant peaks of the QMOKE spectra below 2.0eV. Furthermore, the spectra of the magneto-optic (MO) parameters, which fully describe the MO response of Co2MnSi up to the second order in M, are obtained depending on T-a. Finally, the spectra are compared with ab initio calculations of a purely L2(1)-ordered Co2MnSi Heusler compound.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

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

2020

Kód důvěrnosti údajů

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

Název periodika

Applied Physics Letters

ISSN

0003-6951

e-ISSN

—

Svazek periodika

116

Číslo periodika v rámci svazku

26

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

—

Kód UT WoS článku

000546414200001

EID výsledku v databázi Scopus

2-s2.0-85087546307