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Magnetic-field modulation experiments on colossal magnetoresistance samples: first results
1Department of Physics, University of California, Santa Cruz 95064, USA. bridges@cats.ucsc.edu
Abstract:
Recently we have observed a small change in the width, sigma, of the Mn-O pair distribution function when a IT magnetic field is applied. To improve our sensitivity to magnetic-field-induced changes, we have developed a magnetic field modulation technique. At each X-ray energy we collect two data points, one with field on and the other with field off: as a result we collect two scans simultaneously. The difference in these two traces provides a measure of the magnetic-field-induced change. The results for the modulation measurements will be compared to the earlier work using static magnetic fields.
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