Samples are placed inside a glass tube with this property in an Evans balance, and materials exhibiting this phenomenon appear to decrease in weight when placed on a Gouy balance.
Samples are placed inside a glass tube with this property in an Evans balance, and materials exhibiting this phenomenon appear to decrease in weight when placed on a Gouy balance. Landau names a type of this phenomenon present in free electron gases, and atoms with closed shells are described by the Langevin theory of this phenomenon. Stationary materials exhibiting this phenomenon are not subject to Earnshaw's theorem, and materials with this property possess (*) negative magnetic susceptibility. Pyrolytic carbon, bismuth, and diamonds all strongly exhibit this phenomenon, the "perfect" form of which is produced by a superconductor in the Meissner effect. For 10 points, name this phenomenon in which materials exposed to an applied magnetic field produce an opposing magnetic field. 
Samples are placed inside a glass tube with this property in an Evans balance, and materials exhibiting this phenomenon appear to decrease in weight when placed on a Gouy balance.
diamagnetism