Superconducting Magnets—Applications to the Mössbauer Effect
The possibility of utilizing superconductivity—the vanishing of electrical resistance which occurs in many metals at sufficiently low temperatures—to produce magnetic fields was realized by Kamerlingh Onnes shortly after his initial discovery of the phenomenon in 1911, Until recent times all such efforts were defeated by the inability of superconducting materials to carry high currents in the presence of large magnetic fields. It was not until about 1957 that G. Yntema built the first practical superconducting solenoid by wrapping niobium wire around an iron core to produce a field of 8 kOe, and it is only in the last three years that superconducting magnets have been developed to a stage such that for many purposes they excel conventional magnets. The new era in superconducting technology [1,2] resulted from the discovery by B. Matthias of high-field Nb—Zr alloys and the intermetallic compound Nb3Sn .
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