Properties of Mn-implanted BaTiO3, SrTiO3, and KTaO3

Abstract

Mn ion implantation into single-crystal BaTiO3 (K), SrTiO3, or KTaO3(Ca) was investigated for its effects on the magnetic properties of these materials. Following annealing at 700°C, the Mn implantation was found to induce ferromagnetic behavior for most of the concentration range investigated. For BaTiO3, Mn implantation produced magnetic ordering temperatures near 300 K with coercivities ≤70 Oe. The magnetization/temperature plots showed a non-Brillouin-shaped curve. No secondary phases were detected by high resolution X-ray diffraction. The results are consistent with theoretical predictions for transition metal doping of BaTiO3. The same basic trends were observed for both SrTiO3 and KTaO3, with the exception that at high Mn concentrations (∼5 atom %) the SrTiO3 was no longer ferromagnetic.