Detection of a single magnetic nanoparticle: metrological and biomedical applications
- When?
- Thursday 31 May 2012, 13:00 to 14:00
- Where?
- 02ATI02 - ATI seminar room
- Open to:
- Staff, Students
- Speaker:
- Olga Kazakova, NPL
‘Bulk’ properties of magnetic nanoparticles have been intensively studied for decades. Recently, individual particles have been examined using various methods, including various magnetoresistive detectors, dc nano-SQUID and Hall magnetometry. Here we present our recent results on detection of single magnetic particles with the moment down to 104 μB as well as studies of their magnetic properties using nano-Hall, nano-SQUID and domain wall sensors. The main advantages of semiconductor Hall sensors are their non-invasive nature and high magnetic field sensitivity at room temperature. On the other hand, nano-SQUIDs provide unprecedented magnetic sensitivity at low temperatures and are ideal for metrological applications.
Presented magnetic devices, enabling detection of small moments (potentially down to a few electron spins), are of considerable significance both for nanomagnetic metrology and high sensitivity biological and environmental detectors.
