Soft magnetic films for head core materials mainly electrodeposited CoNiFe based films developed by us were introduced. Electrodeposited CoNiFe thin film has high saturation magnetic flux density (Bs) and low coercivity. Magnetic properties except for Bs and corrosion properties of these films were depended on very small amount of inclusion such as S and H elements. The increase in resistivity (ρ) on the base of this high Bs CoNiFe thin film was developed by controlling very small amount of C inclusion. Finally, application of the film to new type of magnetic recording head was reported.
Thiol derivatized (6S,7R,10R)-4-amino-2,2, 7-trimethyl-10-isopropyl-1-azaspiro [5.5J undecane-1-yloxyl was synthesized to modify the surface of a gold electrode with its self-assembled monolayer. This modified electrode showed symmetrical reversible redox wave at +0.62 V vs. Ag / AgCl, which originates from the electron transfer between the self-assembled monolayer and electrode. The modified electrode exhibited an enantioselective catalytic oxidation for chiral secondary alcohols ; (S)-(−)-1-phenylethanol was oxidized into the ketone more efficiently than (R)-(+)-l-phenylethanol.
Deposition and dissolution mechanism of lithium on the aluminum substrate has been investigated by electrochemical impedance spectroscopy (EIS) and x-ray photoelectron spectroscopy (XPS). Every impedance diagram obtained during deposition and dissolution periods consists of two loops. The diameter of the high-frequency loop is almost constant regardless of the amount of deposition or dissolution, while the magnitude of the low-frequency loop decreases with increasing deposition period, and increases with increasing dissolution period. XPS results showed a surface film, which consists of an outer LiF layer and an inner LiOH-Li2O layer, forms on the Li-Al alloy. Thickness of the LiOH-Li2O layer increases with dissolution period. The mathematical analysis of a model mechanism suggests that the high-frequency loop of the impedance diagram may correspond to both the charge-transfer resistance and the resistance of the LiF layer. The low-frequency loop may comprise the diffusion process of Li+ in the LiOH-Li2O layer, the coverage relaxation of the adsorbed species Liads and Li+ ads, and the alloying process of Li-Al.