51. Analytical balance-based Faraday magnetometer
- Author
-
Roberto De Santis, Thomas Herrmannsdörfer, Marc Uhlarz, and Alberto Riminucci
- Subjects
010302 applied physics ,Physics ,Magnetic composite ,business.industry ,Magnetometer ,General Physics and Astronomy ,Nanotechnology ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,law.invention ,Magnetic field ,SQUID ,Optics ,law ,Magnet ,magnetism ,biophysics ,0103 physical sciences ,magnetometer ,Sensitivity (control systems) ,0210 nano-technology ,business ,Faraday cage ,Analytical balance - Abstract
We introduce a Faraday magnetometer based on an analytical balance in which we were able to apply magnetic fields up to 0.14 T. We calibrated it with a 1 mm Ni sphere previously characterized in a superconducting quantum interference device (SQUID) magnetometer. The proposed magnetometer reached a theoretical sensitivity of 3 × 10−8A m2. We demonstrated its operation on magnetic composite scaffolds made of poly(ε-caprolactone)/iron-doped hydroxyapatite. To confirm the validity of the method, we measured the same scaffold properties in a SQUID magnetometer. The agreement between the two measurements was within 5% at 0.127 T and 12% at 24 mT. With the addition, for a small cost, of a permanent magnet and computer controlled linear translators, we were thus able to assemble a Faraday magnetometer based on an analytical balance, which is a virtually ubiquitous instrument. This will make simple but effective magnetometry easily accessible to most laboratories, in particular, to life sciences ones, which are increasingly interested in magnetic materials.
- Published
- 2017