Structure, magnetic and optical properties, and Hall effect of Co- and Fe-doped SnO 2 films

摘要: Magnetically doped ${\text{SnO}}_{2}$ is a promising dilute magnetic semiconductor and may also be applicable in variety of magneto-optical applications. Epitaxial films ${\text{Sn}}_{1\ensuremath{-}x}{\text{Co}}_{x}{\text{O}}_{2}$ $(x\ensuremath{\le}0.2)$ ${\text{Sn}}_{1\ensuremath{-}x}{\text{Fe}}_{x}{\text{O}}_{2}$ $(x\ensuremath{\le}0.4)$ were grown by pulsed-laser deposition on $R$-plane ${\text{Al}}_{2}{\text{O}}_{3}$ substrates. Structural, magnetic, magnetotransport measurements consistently point to source magnetism within the host lattice rather than from an impurity phase. The are strained their anisotropy consistent with presence substantial amounts magnetoelastic high-spin ${\text{Fe}}^{2+}$, or high- low-spin ${\text{Co}}^{2+}$. ${\text{Sn}}_{0.9}{\text{Co}}_{0.1}{\text{O}}_{2}$ have reasonably high Faraday rotation 570\ifmmode^\circ\else\textdegree\fi{}/cm, refractive index $n$ extinction coefficient $k$ at 1550 nm wavelength 1.957 0.0102, respectively.