Superconducting Mg–B films by pulsed-laser deposition in an in situ two-step process using multicomponent targets

Blank, Dave H. A.; Hilgenkamp, Hans; Brinkman, Alexander; Mijatovic, Dragana; Rijnders, Guus; Rogalla, Horst
July 2001
Applied Physics Letters;7/16/2001, Vol. 79 Issue 3
Academic Journal
Superconducting thin films have been prepared in an in situ two-step process, using the Mg–B plasma generated by pulsed-laser ablation. The target was composed of a mixture of Mg and MgB[sub 2] powders to compensate for the volatility of Mg and, therefore, to ensure a high Mg content in the film. The films were deposited at temperatures ranging from room temperature to 300 °C followed by a low-pressure in situ annealing procedure. Various substrates have been used and diverse ways to increase the Mg content into the film were applied. The films show a sharp transition in the resistance and have a zero resistance transition temperature of 22–24 K. © 2001 American Institute of Physics.


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