| Zugriffsnummer | 33449 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | Magnetic bead detection using domain wall-based nanosensor |
| Autor(in); Institution |
Corte-León, Hector; National Physical Laboratory (NPL), TQEM, Teddington, UK; Royal Hollow University of London, Physics Department, Egham, UK
Krzysteczko, Patryk; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Schumacher, Hans Werner; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Manzin, Alessandra; Istituto Nazionale di Ricerca Metrologica (INRIM), Torino, ITALY
Cox, David; National Physical Laboratory (NPL), TQEM, Teddington, UK; Surrey University, Applied Technology Institute, Guildford, UK
Antonov, Vladimir; Royal Hollow University of London, Physics Department, Egham, UK
Kazakova, Olga; National Physical Laboratory (NPL), TQEM, Teddington, UK
|
| Quelle/Jahr | Journal of Applied Physics: 117 (2015), 17, 17E313-1 - 17E313-4 |
| ISSN | 0021-8979 |
| DOI | |
| Verlag | New York, NY: American Institute of Physics |
| Konferenzangaben | 59th Annual Conference on Magnetism and Magnetic Materials, Honolulu, 03-07, November, 2014, USA |
| Freie Schlagworte | Domain wall ; Nanoparticle detection |
| Zusammenfassung | We investigate the effect of a single magnetic bead (MB) on the domain wall (DW) pinning/depinning fields of a DW trapped at the corner of an L-shaped magnetic nanodevice. DW propagation across the device is investigated using magnetoresistance measurements. DW pinning/depinning fields are characterized in as-prepared devices and after placement of a 1 μm-sized MB (Dynabeads®MyOneTM) at the corner. The effect of the MB on the DW dynamics is seen as an increase in the depinning field for specific orientations of the device with respect to the external magnetic field. The shift of the depinning field, ΔBdep= 4.5–27.0 mT, is highly stable and reproducible, being significantly above the stochastic deviation which is about 0.5 mT. The shift in the deppinning field is inversely proportional to the device width and larger for small negative angles between the device and the external magnetic field. Thus, we demonstrate that DW-based devices can be successfully used for detection of single micron size MB. |
