Composition and crystallinity in electrochemically deposited magnetostrictive galfenol (FeGa)

Abstract

Articles you may be interested inElectrodeposition and characterization of magnetostrictive galfenol (FeGa) thin films for use in microelectromechanical systems

Electrodeposited Fe–Ga Alloy Films for Directly Coupled Noncontact Torque Sensing

“…5b summarizes the dependence of Ga concentration on rotation rate, deposition potential, and electrolyte concentration. This bar chart shows that the composition can be controlled over the 15%Ga to 35%Ga range that has been shown to have useful magnetostriction constants [15]. It is also important to note that the Fe 1−x Ga x films made within the parameters studied here did not contain oxygen impurities within the limit of detection.…”

“…McGary and then later refined and characterized by Reddy and Estrine [15], [20]- [22]. In these works, uniform, high quality films were deposited onto rotating disk electrodes (RDE), and the importance of boundary layer control was shown.…”

Galfenol Thin Films and Nanowires

“…Estrine showed that sputter-deposited Cr/Cu adhesion layers were effective contacts for the deposition of Galfenol films (170 nm) onto glass coverslips [16]. Magnetostriction was measured as high as 140 ppm for these 17–21% Ga films.…”

Magnetostriction and volume magnetostriction of sputtered Tb20Fe24Co56 film

“…In recent years, magnetostriction properties of rare-earth-transition metal films have attracted much interest in sensitive, low-power spintronic devices and other magnetostriction microdevices [1][2][3][4][5][6][7][8][9][10][11][12]. Among giant magnetostrictive materials, FeGa is well known because of its low cost and easy manufacturing process [13][14][15]. Although FeGa has a high magnetostriction performance, the effective magnetostriction coefficient (λ eff ) of asdeposited FeGa film is less than 100 ppm [15,16].…”

“…Among giant magnetostrictive materials, FeGa is well known because of its low cost and easy manufacturing process [13][14][15]. Although FeGa has a high magnetostriction performance, the effective magnetostriction coefficient (λ eff ) of asdeposited FeGa film is less than 100 ppm [15,16]. In contrast, thin films of rare-earth-transition metal alloys, such as TbFe-based alloys, which have enormous magnetostrictive performance, are considered to be promising materials for magnetostrictive devices.…”