Post by Professor Lake Shore on Jan 31, 2017 17:47:46 GMT -5
What field should I apply during a temperature scan type of experiment?
The field applied during a temperature-dependent experiment depends on the material properties you’re trying to study. For example, at higher temperatures when we’re looking for Curie point in an experiment, we usually apply a saturating field and then observe sample behavior as the temperature is increased. In the case of a low-temperature experiment, one should choose between cooling a sample with field applied or in zero field. Typically, the field applied during a low-temperature experiment is well below saturation since we try to observe the sample’s behavior when thermal agitation increases with the increase in temperature. An example of this is an experiment where measurements are used to determine blocking temperature (TB) for a sample. (For further reading, see this 2014 Journal of Nanomaterials article examining into the effect of magnesium (Mg) ion substitution on microstructure and magnetic properties of nickel cadmium (NiCd) ferrite nanoparticles; for this, zero-field-cooled/field-cooled (ZFC/FC) measurements were used to determine blocking temperature for the ferrite nanoparticle samples.)