| At present, researchers pay great attention to alloy nanometer materials, because these materials have more outstanding performance than simple substance metal nanometer materials. In this paper Sm-Co alloy nanotubes were electrodeposited in an anodic aluminum oxide (AAO) template using VERSASTAT-3electrochemical workstation. The crystal structure, morphology and content of the alloy nanotubes were studied by X-ray diffractometer (XRD), field emission scanning electron microscope (FESEM) analysis, transmission electron microscope (TEM) analysis and energy dispersive spectrometry (EDS), respectively. The magnetic properties were analyzed by vibrating sample magnetometer (VSM) analysis.In this experiment, well-ordered AAO templates were successfully fabricated by twice oxidizing pure aluminum foils in a solution of oxalic acid. The morphology was characterized by scanning electron microscope (SEM) analysis. The results show the pore diameter of AAO template is about42nm when the thru holes time is120minutes, while the pore diameter is about95nm when the thru holes time is300minutes.When the deposition voltage was-1.0V, the Sm-Co nanotubes were electrodeposited into the pores of AAO template by DC electrolysis in100mL electrolyte consisting of1.0g SmCl3,1.0g CoCl2,1.0g NH4Cl,0.1g H3BO3, respectively. EDS analysis indicates that the atomic percentage of Sm and Co in the nanotubes is8.21%and5.09%, respectively. The corresponding selected-area electron diffraction (SAED) patterns of a single Sm-Co nanotube show that the nanotube is the amorphous state. It accords with the result of XRD. VSM analysis indicates the Sm-Co alloy nanotubes possess good magnetic property. After the sample was annealed at600℃for2h, the magnetic property of the nanotubes was found to be greatly improved. The coercive force, remanent magnetism and magnetic energy product all have improvement. Through the XRD analysis, we find the reason is amorphous Sm-Co alloy has partly turned into crystalline state SmCo5. |
PDF Full Text Request