Journal Article

PUBDB-2026-02608

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Unconventional non-monotonic oscillations of magnetic damping in a ferromagnet/non-magnet heterostructure

Panda, D.Extern* ; Chirag, K. ; Gloskovskii, A.DESY* ; Sarkar, I. (Corresponding author)Extern*

2026
RSC Publ. Cambridge

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Please use a persistent id in citations: doi:10.1039/D5NR05016B

Abstract: Thickness dependent quantum effects on magnetization dynamics in thin films are of paramount interest in low dimensional physics. Theoretical predictions suggest quantization driven thickness dependent oscillations in magnetic damping of ferromagnetic (FM) films. Here we demonstrate non-monotonic oscillatory variation of magnetic damping with a change in the thickness of the FM layer in a ferromagnet/non-magnet heterostructure of CoFe/Ta thin films. The thickness of the ferromagnetic CoFe layer is found to change by about two monolayers between successive high and low values of magnetic damping. The oscillation in the magnetic damping values is found to decay with the increase in the thickness of the FM layer. Furthermore, using dichroic hard X-ray photoemission, spin sensitive electronic structure measurements are performed on these thin films. The results show periodic enhancement and reduction of the spin scattering phase space with the change in the ferromagnetic layer thickness. This reveals the correlation between the periodic variation of magnetic damping and the spin-dependent electronic scattering in magnetic thin films.

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)
2. Experimentebetreuung PETRA III (FS-PET-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. INDIA-DESY - INDIA-DESY Collaboration (2020_Join2-INDIA-DESY) (2020_Join2-INDIA-DESY)

Experiment(s):

1. PETRA Beamline P22 (PETRA III)

Appears in the scientific report 2026

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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