Incorporation of sulfur into 2.4 T CoFe alloys during galvanostatic deposition has been studied. The results indicate that the main source of sulfur in magnetic deposit is saccharin used as an additive in the plating solution. The atomic percent of sulfur in deposit and the sulfur incorporation rate show strong dependence on saccharin concentration in the plating solution. This dependence has pronounced maximum at C sac Ϸ 0.12 g L −1 , while for C sac Ն 1.5 g L −1 the incorporation rate approaches constant value. A simple physical model is developed to describe the sulfur incorporation as a function of saccharin concentration having an excellent qualitative agreement with experimental data. The corrosion and magnetic properties of the electrodeposited 2.4 T CoFe alloys were found to be the strong function of the sulfur incorporation rate, and these results are discussed within the framework of the proposed sulfur incorporation model.The electrodeposition of magnetically soft, high magnetic moment alloys has been extensively used in the manufacturing of magnetic recording heads, microelectromechanical systems ͑MEMS͒ and nanoelectromechanical systems ͑NEMS͒. 1 The cost effectiveness and facility of implementation have resulted that electrodeposition is now being the main approach used in the fabrication of soft magnetic nanostructures in many emerging fields of nanotechnology. Current research in the electrodeposition of soft magnetic alloys is driven by the need for magnetic alloys with the highest possible magnetic moment 2 and reliable and easily controlled processes, which can deliver nanosize magnetic structures used as an integral part of devices with critical dimensions below 50 nm. 3,4 At this scale, the reliability and performance of magnetic devices becomes critically dependent on the properties of the electrodeposited alloys, their stability during different fabrication steps, and their compatibility with other materials used for magnetic device fabrication. These criteria require that the understanding of the phenomena determining the properties of magnetic alloys be further improved in order to define the optimum electrodeposition process to obtain the alloys with desired characteristics.The development of electrodeposited soft magnetic alloys has gone through several phases in the last three decades. In the very beginning, the alloy of choice was Ni 81 Fe 19 ͑Permalloy͒ with saturation magnetic flux density B s = 1 T. 5 Further development introduced Ni 45 Fe 55 with 70% higher B s values 6 and ternary CoFeNi alloys with lower Ni content and B s ranging between 1.6 and 2.2 T. 2,7-9 In recent years, the electrodeposited soft CoFe alloys with the highest magnetic moment on the Slater-Pauling curve of 2.4 T and composition in the range of Co 30-50 Fe 70-50 were demonstrated as well. 2,3,10 These alloys certainly represent one of the most promising materials for fabrication of the future magnetic recording heads, MEMS and NEMS devices, and the improvement of their properties is the subject of research eff...

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Measurements are reported of the solubility of thallous iodate in various salt solutions at 0", 25" and 40". The data are used to derive dissociation constants for the ion pairs TlCI, TIOH, TlCNS, TlSO4-, TlFe(CN)$-, CaOH+ and CaS04, and hence values for their heats and entropies of dissociation.

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