Stanton, T*; Vopsaroiu, M; Thompson, S M* (2008) A portable instrument for non-contact giant magnetoresistance measurements utilizing the magnetorefractive effect and infrared fibres. Meas. Sci. Technol., 19 (12). 125701

Full text not available from this repository.

Abstract

A portable, low-cost instrument is presented capable of non-contact giant magnetoresistance (GMR) measurements through correlation with the magnetorefractive effect. Each component has been optimized for signal-to-noise ratio, portability and economy. The final design incorporates a pulsable thin-film infrared emitter which floods the surface of the sample providing reflected radiation focused by a lens into an infrared transmitting fibre. This shields the signal and transports it to a lithium tantalate pyroelectric detector. The measurements are performed at 5 Hz, allowing phase sensitive discrimination to reduce noise levels. The instrument is tested on a CoFe/Cu GMR multilayer and its response demonstrated to compare very favourably with larger more expensive instruments providing new opportunities for the remote sensing of GMR.

Item Type:	Article
Subjects:	Advanced Materials Advanced Materials > Magnetic Measurements
Last Modified:	02 Feb 2018 13:15
URI:	http://eprintspublications.npl.co.uk/id/eprint/4246

Actions (login required)

View Item