Laser ablation of Co:ZnO films deposited from Zn and Co metal targets on (0001) Al${}_2$O${}_3$ substrates

Abstract

We report on the synthesis of high-quality Co-doped ZnO thin films using the pulsed laser deposition technique on (0001)-Al${}_2$O${}_3$ substrates performed in an oxidizing atmosphere, using Zn and Co metallic targets. We firstly optimized the growth of ZnO in order to obtain the less strained film. Highly crystallized Co:ZnO thin films are obtained by an alternative deposition from Zn and Co metal targets. This procedure allows an homogenous repartition of the Co in the ZnO wurzite structure which is confirmed by the linear dependance of the out-of-plane lattice parameter as a function of the Co dopant. In the case of 5% Co doped, the film exhibits ferromagnetism with a Curie temperature close to the room temperature.

8 pages, 5 Figures, accepted in Applied Physics Letters

References in corpus (2)

• Formation of Co nanoclusters in epitaxial Ti_{0.96} Co_{0.04} O_2 thin films and their ferromagnetism
• Spectacular decrease of the melting magnetic field in the charge-ordered state of tensile Pr0.5Ca0.5MnO3 films

Cited by in corpus (14)

• Ferromagnetism in substituted zinc oxide
• Impurity-Ion pair induced high-temperature ferromagnetism in Co-doped ZnO
• Absence of room temperature ferromagnetism in bulk Mn-doped ZnO
• Chemical trend of exchange couplings in diluted magnetic II-VI semiconductors
• Dose dependence of ferromagnetism in Co-implanted ZnO
• Co distribution in ferromagnetic rutile Co-doped TiO${}_2$ thin films grown by laser ablation on silicon substrates
• Structural and magnetic properties of a series of low doped Zn${}_{1-x}$Co${}_x$O thin films deposited from Zn and Co metal targets on (0001) Al${}_2$O${}_3$ substrates
• Investigation of laser ablated ZnO thin films grown with Zn metal target: a structural study
• Low temperature hopping magnetotransport in paramagnetic single crystals of cobalt doped ZnO
• Antiferromagnetic interactions in single crystalline Zn1-xCoxO thin films
• Incorporation of cobalt into ZnO nanoclusters
• A first principles study of wurtzite-structure MnO
• Influence of the microstructure on the magnetism of Co-doped ZnO thin films
• Current-driven switching of magnetisation- theory and experiment