Surface superconductivity in a polycrystalline MgB 2
Abstract
We report results of a 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 clear evidence for surface superconducting states in a polycrystalline MgB2.
- Publication:
-
Physica C Superconductivity
- Pub Date:
- September 2007
- DOI:
- 10.1016/j.physc.2007.04.212
- Bibcode:
- 2007PhyC..460..576T
- Keywords:
-
- 74.25.Nf;
- 74.25.Op;
- 74.70.Ad;
- Response to electromagnetic fields;
- Mixed states critical fields and surface sheaths;
- Metals;
- alloys and binary compounds
