Separating altermagnetic and ferromagnetic effects in X-ray magnetic dichroism of rutile NiF2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00141247" target="_blank" >RIV/00216224:14310/25:00141247 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.nature.com/articles/s41535-025-00753-8" target="_blank" >https://www.nature.com/articles/s41535-025-00753-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41535-025-00753-8" target="_blank" >10.1038/s41535-025-00753-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Separating altermagnetic and ferromagnetic effects in X-ray magnetic dichroism of rutile NiF2

Popis výsledku v původním jazyce

We present numerical simulations of X-ray magnetic circular dichroism (XMCD) at the L2,3 edge of Ni in the weakly ferromagnetic altermagnet NiF2. Our results predict a significant XMCD signal for light propagating perpendicular to the magnetic moments, which are approximately aligned along the [010] easy-axis direction. The analysis shows that the altermagnetic and ferromagnetic contributions to the XMCD signal can be uniquely distinguished by their dependence on an applied magnetic field. By varying the angle of the field relative to the easy axis, the in-plane orientation of both the Néel vector and the net magnetization can be systematically controlled. We further demonstrate that the XMCD signal, even under fields as strong as 40 T and for any in-plane orientation, can be accurately described as a linear combination of two spectral components, with geometrical prefactors determined by the field’s magnitude and direction. This insight enables experimental validation of the distinctive relationship between the Néel vector orientation and the X-ray Hall vector in the rutile structure. Quantitative simulations supporting these findings are provided.

Název v anglickém jazyce

Separating altermagnetic and ferromagnetic effects in X-ray magnetic dichroism of rutile NiF2

Popis výsledku anglicky

We present numerical simulations of X-ray magnetic circular dichroism (XMCD) at the L2,3 edge of Ni in the weakly ferromagnetic altermagnet NiF2. Our results predict a significant XMCD signal for light propagating perpendicular to the magnetic moments, which are approximately aligned along the [010] easy-axis direction. The analysis shows that the altermagnetic and ferromagnetic contributions to the XMCD signal can be uniquely distinguished by their dependence on an applied magnetic field. By varying the angle of the field relative to the easy axis, the in-plane orientation of both the Néel vector and the net magnetization can be systematically controlled. We further demonstrate that the XMCD signal, even under fields as strong as 40 T and for any in-plane orientation, can be accurately described as a linear combination of two spectral components, with geometrical prefactors determined by the field’s magnitude and direction. This insight enables experimental validation of the distinctive relationship between the Néel vector orientation and the X-ray Hall vector in the rutile structure. Quantitative simulations supporting these findings are provided.

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

<a href="/cs/project/EH22_008%2F0004572" target="_blank" >EH22_008/0004572: Kvantové materiály pro aplikace v udržitelných technologiích</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

npj Quantum Materials

ISSN

2397-4648

e-ISSN

2397-4648

Svazek periodika

10

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

6

Strana od-do

1-6

Kód UT WoS článku

001489587000001

EID výsledku v databázi Scopus

2-s2.0-105005469225