The Alternative Gradient Field Magnetometer (AGFM) is a device allowing magnetic measurements on thin film samples.The principle is based on the detection of the oscillation amplitude of a sample fixed on a quartz probe which vibrates in a small alternative gradient field.
- The device has a good sensitivity and can measure samples with a total magnetization as small as 10-6 emu.
- Due to the high resonance frequency (typically some Hz’s hundreds) the acquisition time is short (some minutes).
- The measurements can be done with a field parallel or perpendicular to the film plane.
- T = 300 K; maximum Field = 1.3 T.