Paramagnetism of Sn, Co Codoped ZnO Crystals Thick Films Synthesized by Hydrothermal Method

摘要

The Sn Co-doped ZnO crystals thick films were synthesized by hydrothermal method, 6 mol/LKOH as mineralizer, the ratio of the molar of 0.02:0.5:1 add SnO_2, CoCl_2 and ZnO as a precursor, filling factor of 70%, temperature 430°C, the seed crystal ([0002]direction) is pure ZnO crystal prepared by conventional hydrothermal methed. ZnO crystals thick films was prepared on the seed crystal. Thick film was dark green, EDS measurements shows that Co and Zn elements content is 7.47:92.53. Electrical measurements shows that thick film is n-type conductive layer, with the carrier concentration 1.15× 10~(20) cm~(-3), and resistivity of 1.94× 10~(-3) Ω·cm, mobility of 27.8 c~2/V · s. The SQUID measurements shows that Zn_(1-x)Co_xO crystal thick film exhibited paramagnetic.