Silsbee effect

Similarly, if the current in the superconductor exceeds a critical current, the superconductivity is destroyed. This is known as the Silsbee effect. The size of the critical current is dependent on the nature and geometry of the particular sample. 

This second method of destroying superconductivity is known as the Silsbee effect. This hypothesis states that when the electric current flowing in a superconductor produces a magnetic field at the surface of the material that equals or exceeds the threshold field, the normal state is restored. The current corresponding to the threshold field is called the threshold current. For example, for a long wire of diameter d, the magnetic field produced at the surface of the wire by an electric current / is = Ijnd. The critical current in this case would be... 

Silsbee, R. H., 1969. Optical analogue of the Mossbauer effect, in Optical Properties of Solids, S. Nudelman and S. S. Mitra (Eds.), Plenum, New York, pp. 607-624. 

A comprehensive study of TESR in dilute Cu(Fe) alloys (5-lOppm Fe), was carried out by Ritter and Silsbee (1978) for temperatures 2Kfirst observation of TESR in a dilute magnetic alloy below its Kondo temperature. The authors analyzed the results in terms of coupled Bloch equations. The effective relaxation rate for the Cu(Fe) samples showed a clear minimum at approximately 2.5 K, with the rate increasing by about 40% to an apparent plateau at the lowest temperatures investigated. The effective g-value of the Cu(Fe) samples does not show any deviation of the observed g-value from that of pure Cu. The results indicate that the Cu(Fe) system is strongly bottlenecked. 

P.R. Blankenhor, M.R. Silsbee, B.D. Blankenhom, M. DiCola and K. Kessler, Temperature and moisture effects on selected properties of wood fiber-cement composites , Cem. Concr. Res. 29,1999, 737 741. 

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