Technology for Polarization Measurement

Evaluation of New Magnetic Materials

The first recording of the human voice on a magnetic medium was over 115 years ago. Since then many technologies and materials for the recording of audio, video, computer memory and a host of other applications have been developed. The rapid characterization of new materials for this purpose is critical to ongoing research and the magneto optic Kerr effect, or MOKE, has long been recognized as the preferred method for this characterization.

In a MOKE system, a light beam is reflected off the surface of a magnetic film. The magnetization of the film causes an anisotropy in the alignment of the surface atoms and molecules that change the polarization state of the light reflected from the surface. The sensitive detection of these polarization changes is the goal of Hinds Instruments’ PEM-based approach to this field. In particular, a MOKE hysteresis looper allows the user to scan the magnetic field around the sample while the polarization changes (and thus structural changes on the surface) are measured. With this technology, the coercivity of a new magnetic film can be determined in minutes. The PEM offers the most sensitive way to detect these changes.

HysteresisLoops

Hinds offers several ways for the magnetics researcher to acquire this critical measurement tool. If you would prefer to build your own instrument, we can sell you the optical components required. We also offer the Exicor® HLT, a turnkey system that allows you to be up and running quickly to start taking precision measurements.

SUGGESTED PRODUCTS:

- MOKE Kit

- Exicor® Domain Hysteresis Loop Tracer

 

FURTHER READING:

R. Atkinson, G. Didrichsen, W.R. Hendren, I.W. Salter and R.J. Pollard, "Dynamic in situ optical and magneto-optical monitoring of the growth of Co/Au multilayers", Phys.Rev. B, 62, 18, 12 294-12 302 (2000).

R. Atkinson, "Dynamic in situ optical and magneto-optical monitoring of the growth of Co/Au multilayers", J. Phys.: Condens. Matter. 12, 7735-7745 (2000).

Bennemann K.H., (Ed), Nonlinear Optics in Metals, Clarendon Press, Oxford, (1998).

R. Atkinson, G. Didrichsen, W.R. Hendren, I.W. Salter and R.J. Pollard, "Dynamic in situ optical and magneto-optical monitoring of the growth of Co-Pd multilayers" J. Phys.: Condens. Matter. 13, 691-705 (2001).

Magneto-Optic Kerr Effect
Magnetism in a New Light

 
Contact Us to see how Hinds Instruments works with our customers to solve complex metrology problems.