Electrochemical Deposition of FeCo and FeCoV Alloys

Abstract

High-quality FeCo and FeCoV thin films with Fe concentrations between 32 and 52 atom% were electrodeposited from a sulfamate solution. The grain size of the films was about 200 nm. The thickness of the films was up to several hundred micrometers. The magnetic properties of these films are characteristic of bulk FeCo alloys. The addition of small amounts of vanadium eliminated film cracking but slightly decreased the magnetic permeability.

Stress in electrodeposited CoFe alloy films

“…Add vanadium salts (VOSO 4 ) to improve the maximum platable CoFe thickness without film cracking [8].…”

“…The difficulty in making crack-free films in thickness over 2-4 mm has been one of the key challenges for the implementation [5][6][7][8][9][10][11][12]. The other challenge was their poor corrosion resistance.…”

The effect of magnetic fields on the electrodeposition of CoFe alloys

“…Numerous investigations have been carried out related to the electrodeposition of the iron group alloys, most of them concerned with the NiFe alloy system [1,6,7] but CoNiFe [5,[8][9][10] and CoFe [9,[11][12][13][14] have also been investigated.…”

“…the highest B s of 2.45 T and relatively low coercivity of about 2 Oe [15]. The influence of plating parameters such as the electrolyte composition [2,9,[11][12][13][14], current density [2,13], bulk pH value [2], etc. on the deposited CoFe layer properties (morphology, structure, magnetic properties) have been investigated.…”

An inspection of force reduction in high force electromagnetic tweezers made of FeCo-V foil by laser cutting

“…With photolithographic technology and electro-deposition, small magnetic structures can be realized. 16,18 However, the material performance reported for thin electroplated layers [19][20][21] is usually below the values given for bulk material. 22 Moreover, the practical performance is also deteriorated because of the thickness effect.…”