| Zugriffsnummer | 33441 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Regarding the Néel relaxation time constant in magnetorelaxometry |
| Autor(in); Institution |
Leliaert, J.; Department of Electrical Energy, Systems and Automation, Ghent University, Gent, BELGIUM; Department of Solid State Sciences, Ghent University, Gent, BELGIUM
Coene, A.; Department of Electrical Energy, Systems and Automation, Ghent University, Gent, BELGIUM
Crevecoeur, G.; Department of Electrical Energy, Systems and Automation, Ghent University, Gent, BELGIUM
Vansteenkiste, A.; Department of Solid State Sciences, Ghent University, Gent, BELGIUM
Eberbeck, Dietmar; 8.2, Biosignale, PTB-Berlin
Wiekhorst, Frank; 8.2, Biosignale, PTB-Berlin
Van Waeyenberge, B.; Department of Solid State Sciences, Ghent University, Gent, BELGIUM
Dupré, L; Department of Electrical Energy, Systems and Automation, Ghent University, Gent, BELGIUM
|
| Quelle/Jahr | Journal of Applied Physics: 116 (2014), 163914-1 - 163914-5 |
| ISSN | 0021-8979 (PRINT) ; 1089-7550 (ONLINE) |
| DOI | |
| URL | |
| Verlag | AIP |
| Zusammenfassung | Magnetorelaxometry (MRX) is a sensitive measurement technique frequently employed inbiomedical applications for imaging magnetic nanoparticles (MNP). In this article, we employ a first principles model to investigate the effects of different iron oxide MNP sample properties on the Néel relaxation time constant τN in magnetorelaxometry. Using this model, we determined that dipolar interactions start to have an impact on the MRX signal from Fe concentrations of 100 mmol/l and result in a smaller τN. Additionally, the micromagnetic damping constant, closely related to τN, was found to be between 0.0005 and 0.002 by comparison to an MRX measurement of iron oxide particles. This is significantly lower compared to the bulk value of 0.07 for this material. |
Zitierung
Leliaert, J., Coene, A., Crevecoeur, G., Vansteenkiste, A., Eberbeck, D., Wiekhorst, F., Van Waeyenberge, B., & Dupré, L. (2014). Regarding the Néel relaxation time constant in magnetorelaxometry. Journal of Applied Physics, 116, 163914-1–163914-5. https://doi.org/10.1063/1.4900916