Journal Article

PUBDB-2025-01286

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png X-ray standing wave method to study magnetism in crystals with site selectivity

Kaminski, M. (Corresponding author)Extern*DESY* ; Pokhriyal, P.Extern*DESY* ; Schulz-Ritter, H.DESY* ; Francoual, S.DESY* ; Laurence, B. ; Tolkiehn, M.DESY*

2026
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/tkb6-6qbx  doi:10.3204/PUBDB-2025-01286

Abstract: We report a new method for studying magnetism at the atomic level with site selectivity. It is based on thecombination of the site-selective diffraction-based x-ray standing wave (XSW) technique and x-ray magneticcircular dichroism (XMCD), which provides the magnetic sensitivity. The use of the standing wave resultingfrom an interference between the incoming and the Bragg reflected electromagnetic waves ensures that the phaseinformation is not lost and thus brings information about the magnetism at a given site directly. In the paper, weprovide the theoretical foundations of such a method based on the dynamical theory of x-ray diffraction andtime-dependent perturbation theory. By means of computer simulations, the principle of the method is thuspresented in a rather accessible way. Finally, we demonstrate the results of a proof-of-principle experiment onsingle-crystalline yttrium-iron-garnet (YIG, Y$_3$Fe$_5$O$_{12}$). We show data exhibiting a clear variation in the XMCDsignal caused by the standing wave. A comparison with theoretical functions illustrates that the established theoryreliably describes the phenomena involved and allows to extract useful information about the magnetic momentsin YIG.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-D (FS-PETRA-D)
3. PETRA-S (FS-PETRA-S)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20210835 (I-20210835) (I-20210835)
4. FS-Proposal: I-20220252 (I-20220252) (I-20220252)

Experiment(s):

1. PETRA Beamline P09 (PETRA III)
2. PETRA Beamline P24 (PETRA III)

Appears in the scientific report 2026

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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