Surface superconducting states in a polycrystalline MgB2 sample
Menachem I. Tsindlekht, Grigory I. Leviev, Valery M. Genkin, Israel Felner, Pavlo Mikheenko, J. Stuart Abell
Abstract
We report results of dc magnetic and ac linear low-frequency study of a polycrystalline MgB2 sample. AC susceptibility measurements at low frequencies, performed under dc fields parallel to the sample surface, provide a clear evidence for surface superconducting states in MgB2.
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