Quantification of magnetization of nanostructures via three complementary methods
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| Název: | Quantification of magnetization of nanostructures via three complementary methods |
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| Autoři: | Xianhui Ye, Hangbo Su, Jiaqi Su, András Kovács, Marco Beleggia, Rafal E. Dunin-Borkowski, Zi-An Li |
| Zdroj: | Applied Physics Letters. 126 |
| Informace o vydavateli: | AIP Publishing, 2025. |
| Rok vydání: | 2025 |
| Popis: | The quantitative measurement of magnetization in magnetic nanostructures plays a crucial role in advancing both fundamental understanding and applied research. Off-axis electron holography in a transmission electron microscope enables the retrieval of magnetic phase shifts induced by magnetic induction fields, thereby allowing precise quantification of magnetization. Using magnetite (Fe3O4) nanoparticles as a model system, we use off-axis electron holography to demonstrate three complementary methods for quantifying the magnetic properties of nanoparticles. These methods are the simple geometric approximation, the magnetic phase gradient integration, and the model-based iterative reconstruction, each providing unique capability, ranging from the rapid estimation of in-plane magnetic induction to highly detailed spatially resolved magnetization maps. We analyze the strengths, the limitations, and the applicability of each approach, emphasizing the potential of integrating these methods for a comprehensive analysis of the magnetization of nanomaterials. |
| Druh dokumentu: | Article |
| Jazyk: | English |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/5.0266886 |
| Přístupové číslo: | edsair.doi...........62d134f0d6f69b14b4ec32a3b28af76e |
| Databáze: | OpenAIRE |
Nájsť tento článok vo Web of Science | Abstrakt: | The quantitative measurement of magnetization in magnetic nanostructures plays a crucial role in advancing both fundamental understanding and applied research. Off-axis electron holography in a transmission electron microscope enables the retrieval of magnetic phase shifts induced by magnetic induction fields, thereby allowing precise quantification of magnetization. Using magnetite (Fe3O4) nanoparticles as a model system, we use off-axis electron holography to demonstrate three complementary methods for quantifying the magnetic properties of nanoparticles. These methods are the simple geometric approximation, the magnetic phase gradient integration, and the model-based iterative reconstruction, each providing unique capability, ranging from the rapid estimation of in-plane magnetic induction to highly detailed spatially resolved magnetization maps. We analyze the strengths, the limitations, and the applicability of each approach, emphasizing the potential of integrating these methods for a comprehensive analysis of the magnetization of nanomaterials. |
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| ISSN: | 10773118 00036951 |
| DOI: | 10.1063/5.0266886 |