Fabrication and Superconducting Property of MgB2/Mo Multilayer Films

The MgB2/Mo multilayer films were fabricated, which the MgB2 layers were grown by the hybrid physics-chemistry vapor deposited (HPCVD), the Mo films were prepared with magnetron sputtering (MS) technology. The surface morphology, crystal structure and superconducting properties of MgB2/Mo multilayer were investigated by scanning electron microscopy, X-ray diffraction, and four-point probe method. The results show that the multilayer can maintain good stability when the crystallization degree is further improved and the grain size increases with the subsequent deposition temperature of MgB2 films. The excellent properties are obtained in the upper MgB2 layer prepared at 730 degrees C, including the superconducting transition temperature (T-conset) and zero resistance temperature (T-c0) for 39.73-39.53 K and the remaining resistivity down to about 0.77 mu Omega.cm, which indicates that the films are in the clean limit.