Raman scattering and room temperature ferromagnetism in Co-doped SrTiO3 particles

► Co-doped SrTiO3 nanoparticles were prepared using Sol-Gel method. ► Xps shows the existence of oxygen vacancies in SrTiO3 and Co-SrTiO3. And Co doping results in more oxygen vacancies. ► Raman scattering and ferromagnetic property were investigated. ► Both of Ferromagnetism and crystal deformation have a same dependence on Fe concentration and annealing temperature. ► Crystal deformation and oxygen vacancies contribute to ferromagnetism in Co-doped SrTiO3 samples at the same time.