Journal Article

PUBDB-2025-02434

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Impact of interface engineering on domain wall motion in Ta/CoFeB/MgO multilayers with perpendicular magnetic anisotropy

Sharma, A.Extern* ; Raj, R.Extern* ; Rawat, K.Extern* ; Reddy, V. R.Extern* ; Gupta, M.Extern* ; Gloskovskii, A.DESY* ; Rawat, R.Extern* ; Gupta, A.Extern* ; Brajpuriya, R. K.Extern* ; Kaushik, V.Extern* ; Pathak, S. (Corresponding author)Extern*

2025
Elsevier Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.apsusc.2025.163469

Abstract: The study investigates the impact of interface engineering on the behaviour of magnetic domain walls (DWs) in perpendicularly magnetized Ta/CoFeB/MgO ultrathin films, for next-generation high-density non-volatile energy efficient memory applications that utilize DW motion. Since perpendicular magnetic anisotropy (PMA) is an interfacial property, the CoFeB interfaces were modified through thermal annealing in the temperature range of 100 to 250 °C. It is observed that the multilayer demonstrates PMA up to a temperature of 200 °C. Chemical analysis reveals that after annealing, there is diffusion of boron towards MgO leading to the formation of boron oxide along with the reduction of Co-O bonds, which leads to the suppression of PMA along with an increase in coercivity. Furthermore, we examined the velocity of DW driven by an external field within the creep regime through the method of symmetric bubble expansion. Interfacial atomic movement across interfaces induces intermixing, leading to alloy formation. This structural modification enhances the pinning centres, as reflected in the increased roughness of the DWs. This intermixing also led to a significant increase in the creep constant, highlighting the role of interface in controlling DW dynamics.

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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. FS-Proposal: I-20231332 (I-20231332) (I-20231332)
4. 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 2025

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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