Sub-10-nm quantification of spin and orbital magnetic moment across the metamagnetic phase transition in FeRh using EMCD

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F26%3A0201394" target="_blank" >RIV/00216305:26620/26:0201394 - isvavai.cz</a>

Result on the web

<a href="https://journals.aps.org/prmaterials/abstract/10.1103/m3vy-18hn" target="_blank" >https://journals.aps.org/prmaterials/abstract/10.1103/m3vy-18hn</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/m3vy-18hn" target="_blank" >10.1103/m3vy-18hn</a>

Result language

angličtina

Original language name

Sub-10-nm quantification of spin and orbital magnetic moment across the metamagnetic phase transition in FeRh using EMCD

Original language description

Electron magnetic circular dichroism (EMCD) in transmission electron microscopy (TEM) enables elementspecific measurement of spin and orbital magnetic moments, analogous to x-ray magnetic circular dichroism (XMCD). While the EMCD technique offers unmatched spatial resolution, its quantitative accuracy remains under scrutiny, particularly in beam-splitter geometries with convergent probes. Here, we systematically evaluate the limits of quantitative EMCD analysis using the first-order magnetostructural transition in the functional phase-change material FeRh as a tunable magnetic reference. Unlike previous EMCD studies primarily focused on elemental ferromagnets such as Fe, we demonstrate its applicability to a correlated material exhibiting coupled structural and magnetic order. We demonstrate that the extracted orbital-to-spin moment ratio (mL/mS) remains within the same order of magnitude as XMCD benchmarks, despite a systematic reduction in absolute value, for TEM probes down to approximately 6 nm, thereby establishing the validity range for reliable quantification. For nanometer-sized probes with higher convergence angles, we observe an enhanced mL/mS, which we attribute to a combination of instrumental factors and sensitivity to nanoscale heterogeneity within the probed volume. Our results confirm that EMCD provides quantitative agreement with macroscale techniques under suitable conditions, while uniquely enabling spatially confined measurements of local magnetic moments in functional magnetic materials, and allowing the study of interfacial, defect-mediated, or phase-separated magnetism that is inaccessible to photon-based methods.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

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

Project

<a href="/en/project/LM2023051" target="_blank" >LM2023051: Research infrastructure CzechNanoLab</a><br>

Continuities

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

Publication year

2026

Confidentiality

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

Name of the periodical

Physical Review Materials

ISSN

2475-9953

e-ISSN

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Volume of the periodical

10

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

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UT code for WoS article

001681182300002

EID of the result in the Scopus database

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