| Structural and magnetic properties of the nanowires and nanoparticles of Ba-hexaferrites |
| Paper ID : 1123-UFGNSM-FULL |
| Authors: |
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Hossein Agharezaei1, mahmood moradi1, saeid behaein *2, Mohammad Rostami3 1Physics Department, College of Sciences, Shiraz University, Shiraz, Iran 2a Physics Department, College of Sciences, Shiraz University, Shiraz, Iran 3Department of Physics, Estahban Higher Education Center, Estahban, Iran |
| Abstract: |
| The nanoparticles and nanowires of barium hexaferrite have been produced, and the structural and magnetic properties of the samples were investigated. The nanoparticles have been synthesized by the sol gel auto-combustion method and the nanowires have been fabricated by dip coating in alumina template. The required templates are fabricated by anodizing process. Initially, the piece of the pure aluminum sheet (99.999%) was cleaned in three steps. Then, two-step anodization process is applied, first 40V mild and second 130V hard anodization in oxalic acid 0.3M. The average diameter of the produced templates is about 35nm, and the poor widening method in phosphoric acid 0.5M was used to increase holes diameter to about 65 nm. Fe/Ba ratio was changed from 10 to 12 in precursor and the calcination temperature was changed from 500 to 900 ºC in order to achieve the M-type Ba-hexaferrite phase and the optimized magnetic properties of barium ferrite in the nanowires. The X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) were used to investigate the structural properties of the samples. The formation of the nanowires was approved by the field emission scanning electron microscope (FESEM), and it is found the average diameter size for the nanowire is about 60 nm. The vibrating sample magnetometer (VSM) was employed to consider the magnetic properties of the nanowires and nanoparticles. According to the results of our experiments, it seems that the nanowires could be appropriate candidates in order to be used in high density and perpendicular recording media. |
| Keywords: |
| Anodize, Barium hexaferrite, nanowires, magnetic properties |
| Status : Paper Accepted (Oral Presentation) |
