Of late, d⁰ ferromagnetic oxide materials have been studied as potential material for spintronics application. We investigate the crystal structure, magnetic, optical, and dielectric properties of Ag-doped TiO₂ compounds. XRD study reveals polycrystalline rutile form of TiO₂ with tetragonal-type structure. SEM micrographs show spherical particles of size 2–3 µm. All the compounds exhibit ferromagnetism with Curie temperature beyond 400 K and with a typical coercivity value in the range 130–550 Oe. The bifurcation of ZFC and FC M–T curves points out magnetic irreversibility. All Ag-doped TiO₂ compounds exhibited p-type conductivity as per the Hall effect study. Optical absorbance data indicate the widening of the band gap up to 6% of Ag doping followed by a decrease for higher doping and these materials exhibit transmittance in the range of 20–30%. The compounds exhibit zero dielectric loss and appreciable dielectric constant and their AC conductivity increases with Ag doping.

最近，d ⁰铁磁氧化物材料已被研究作为自旋电子学应用的潜在材料。我们研究了 Ag 掺杂的 TiO ₂化合物的晶体结构、磁性、光学和介电特性。XRD 研究揭示了具有四方型结构的 TiO _{2 的}多晶金红石形式。SEM 显微照片显示大小为 2–3 µm 的球形颗粒。所有化合物都表现出铁磁性，居里温度超过 400 K，典型矫顽力值在 130-550 Oe 范围内。ZFC 和 FC M - T曲线的分叉表明了磁不可逆性。全Ag掺杂TiO ₂根据霍尔效应研究，化合物表现出 p 型导电性。光吸收数据表明带隙加宽到 6% 的 Ag 掺杂，然后随着掺杂量的增加而减少，这些材料的透射率在 20-30% 的范围内。这些化合物表现出零介电损耗和可观的介电常数，并且它们的 AC 电导率随着 Ag 掺杂而增加。