Abstract
The structural and magnetic properties of Fe-Pt films on Si(100) with a 40 nm Al buffer layer were investigated by metallurgical microscope, atomic force microscope (AFM), scanning electron microscope(SEM), energy dispersive X-ray fluorescence (EDXRF), vibrating sample magnetometer (VSM), and magneto-optical Kerr effect (MOKE). The Al buffer layer was deposited onto the Si(100) substrate by sputter deposition method, after which we electrodeposited thin FexPt1-x films onto the top. At the beginning of this research, we made a series of tests about how to get a flat thin FexPt1-x film by electrodeposition. It took a lot of time for us to finger out. The constitute of the electrolyte (30 ml) were 0.1 M FeSO4(aq), x M H2PtCl6(aq), and 0.5 M H3BO3(aq). The pH values of the electrolyte did not change before and after electrodeposition, this implies that the production of H2 was less significant during the electrodeposition in our research. A systematical study was made to investigate the influences of the depositing current (I), depositing time (t), and total charge (Qt) on the composition, nucleation, and magnetism of the thin iron-platinum film. The physical mechanism is discussed in this thesis. This research is helpful for us to understand the physical properties of the electrodeposited Fe-Pt/ 40 nm Al/Si(100) system.
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