Abstract
We have successfully fabricatedc-axis-oriented MgB2 thin films by using a laser-assisted chemical vapor deposition (LACVD) technique.Mg and B sources were supplied by pulsed laser ablation and a mixture ofB2H6 gas inH2, respectively.The MgB2 thin filmsgrown on Al2O3(0001) substrates at 400 °C showed a superconducting transition temperature of 40.2 K with a sharptransition width of 0.2 K and a high critical current density of about107 A cm−2 at 20 K and zero field, suggesting that this low-temperature process would be apromising technique for electronic devices operating at high temperatures above20 K.
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