Magnetism in cobalt-doped Cu[sub 2]O thin films without and with Al, V, or Zn codopants.

Thin films of 5% Co doped Cu[SUB2]O were grown on single-crystal (001) MgO substrates by pulsed-laser deposition, without and with 0.5% codoping with Al, V, or Zn. Structural, electrical, and magnetic properties were studied. The films showed phase-pure character under the chosen optimum growth conditions. Spin-glass-like behavior was observed in Co-doped films without codoping. A clear ferromagnetic signal at room temperature was found only in the case of Co:Cu[SUB2]O films codoped with Al. [ABSTRACT FROM AUTHOR]