The vibrating sample magnetometer significantly underestimates the magnetization of liquid magnetic fluids due to the delayed movement of magnetic aggregates, making it unsuitable for such measurements unless the sample is polymerized.
Use caution with VSM for magnetic fluids due to underestimation; leaves open standardization of magnetization measurements in liquids.
The magnetization curves of magnetic fluid samples were measured using a vibrating sample magnetometer (VSM) and the differential run method. For standard magnetic fluids, the VSM gives significantly underestimated values of magnetization. In the case of a solid sample of a magnetic fluid based on epoxy resin, there is a complete coincidence of the magnetization curves obtained by the two measurement methods. The last experiment was performed with a styrene-based sample. It was initially measured with the use of the VSM in a liquid state. Then the sample was polymerized (without being removed from the magnetometer) and repeated measurements were performed. The magnetization curve of the liquid sample was noticeably lower than that of the polymerized sample.
No takes yet. Share an insight, caveat, or question.
A. V. Lebedev (2022) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: