Abstract

Mn ion implantation into single-crystal BaTiO 3 (K). SrTiO 3 , or KTaO 3 (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 BaTiO 3 , 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 BaTiO 3 . The same basic trends were observed for both SrTiO 3 and KTaO 3 , with the exception that at high Mn concentrations (∼5 atom %) the SrTiO3 was no longer ferromagnetic.

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