Ferromagnetism is the result of long range correlation amongst electron spins.
Attributing all velocity, attenuation, and frequency dependence to electrical properties alone will also result in incorrect estimation of soil density and water content when magnetic properties are different from free space. The grain size distribution, domain size distribution, amount and presence of titanium, and other factors may also be important. The most important kinds of magnetic properties are those called ferromagnetism, ferrimagnetism and superparamagnetism. Copyright 1998-2000 Gary R. Olhoeft. All rights reserved.