Magnetic and Structural Studies in Co- and Mn-implanted SrTiO₃ Single Crystals

Abstract

Micro Raman and static magnetization data on manganese or cobalt-implanted (at 3 or 5 at.%) strontium titanate (Mn,Co):SrTiO₃ single crystals are presented. Micro Raman results reveal a cubic perovskite structure at 300 K with no evidence of any secondary phase. All samples show ferromagnetism both at 300 K and at 10 K. Moreover, micro Raman spectra at low temperature reveal the presence of polar ordering, which allow to consider the investigated materials as possible host matrices for multiferroic phenomena. Obtained results are discussed in connection to supplementary outcomes derived by content, optical absorption and electron paramagnetic resonance (EPR) measurements.

Acknowledgments

This research was supported by the grant KJB100100703 of the GA of the AS CR, project MSM 6840770021, and by the RBR grant 06-02-17320 and by the Italian Grant-Fondazione Cariplo entitled “Diluted magnetic oxides thin films: Towards transparent spintronics.”

Notes

^†Deceased.