Optical Monitoring of the Magnetization Switching of Single Synthetic-Antiferromagnetic Nanoplatelets with Perpendicular Magnetic Anisotropy

S. Adhikari, J. Li, Y. Wang, L. Ruijs, J. Liu, B. Koopmans, M. Orrit (Corresponding author), R. Lavrijsen (Corresponding author)

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

2 Citaten (Scopus)
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Samenvatting

Synthetic antiferromagnetic nanoplatelets (NPs) with a large perpendicular magnetic anisotropy (SAF-PMA NPs) have a large potential in future local mechanical torque-transfer applications for e.g., biomedicine. However, the mechanisms of magnetization switching of these structures at the nanoscale are not well understood. Here, we have used a simple and relatively fast single-particle optical technique that goes beyond the diffraction limit to measure photothermal magnetic circular dichroism (PT MCD). This allows us to study the magnetization switching as a function of applied magnetic field of single 122 nm diameter SAF-PMA NPs with a thickness of 15 nm. We extract and discuss the differences between the switching field distributions of large ensembles of NPs and of single NPs. In particular, single-particle PT MCD allows us to address the spatial and temporal heterogeneity of the magnetic switching fields of the NPs at the single-particle level. We expect this new insight to help understand better the dynamic torque transfer, e.g., in biomedical and microfluidic applications.

Originele taal-2Engels
Pagina's (van-tot)1512-1518
Aantal pagina's7
TijdschriftACS Photonics
Volume10
Nummer van het tijdschrift5
DOI's
StatusGepubliceerd - 17 mei 2023

Bibliografische nota

Funding Information:
This work was supported by The Netherlands Organisation for Scientific Research (NWO/OCW) as part of the Frontiers of Nanoscience (NanoFront) program and by the Open Technology Program (TTW-OTP, project no. 16008). S.A. acknowledges NWO for financial support from Spinoza prize (Orrit).

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