Thermally induced switching field distribution of a single CoPt dot in a large array
| Autor: | Engelen, J.B.C., Delalande, M., le Fèbre, A.J., Bolhuis, T., Shimatsu, T., Kikuchi, N., Abelmann, L., Lodder, J.C. |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Field (physics) Condensed matter physics Mechanical Engineering Bioengineering General Chemistry Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Laser Geomagnetic reversal law.invention Condensed Matter::Materials Science Magnetic anisotropy Hysteresis TSTNE-Magnet-AHE: Anomalous Hall Effect Interference (communication) Mechanics of Materials law Hall effect General Materials Science TST-SMI: Formerly in EWI-SMI TST-uSPAM: micro Scanning Probe Array Memory Electrical and Electronic Engineering Anisotropy |
| Zdroj: | Nanotechnology, 21(3), 035703-035709. IOP Publishing Ltd. |
| ISSN: | 1361-6528 0957-4484 |
| DOI: | 10.1088/0957-4484/21/3/035703 |
| Popis: | Magnetic dot arrays with perpendicular magnetic anisotropy were fabricated by patterning Co(80)Pt(20)-alloy continuous films by means of laser interference lithography. As commonly seen in large dot arrays, there is a large difference in the switching field between dots. Here we investigate the origin of this large switching field distribution, by using the anomalous Hall effect (AHE). The high sensitivity of the AHE permits us to measure the magnetic reversal of individual dots in an array of 80 dots with a diameter of 180 nm. By taking 1000 hysteresis loops we reveal the thermally induced switching field distribution SFD(T) of individual dots inside the array. The SFD(T) of the first and last switching dots were fitted to an Arrhenius model, and a clear difference in switching volume and magnetic anisotropy was observed between dots switching at low and high fields. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|