Effects of Carbon Content on Magnetic and Microwave Properties of Iron Gallium Carbon Thin Films

Effects of Carbon Content on Magnetic and Microwave Properties of Iron Gallium Carbon Thin Films

Authors : X Liang, C Dong, NX Sun

Bulletin of the American Physical Society | Retrieved from Google Scholar

Publication date : 2019

Journal : APS March Meeting Abstracts

Volume : 2019

Pages : R41. 014

Description :

A systematic investigation of the soft magnetism, delta E effect, magnetostriction, and microwave properties has been carried out on iron gallium carbon (Fe-Ga-C) thin films over a wide carbon content range. The phase transformation of the Fe-Ga-C films from bcc polycrystalline to amorphous phase leads to excellent magnetic softness with a low coercivity of less than 1 Oe, high 4pMs, narrow ferromagnetic resonance (FMR) linewidth at 10 GHz of 20 30 Oe and ultra-low Gilbert damping constant of 0.0027. A record high piezomagnetic coefficient of 9.71 ppm/Oe, high saturation magnetostriction constant of 81.2 ppm, and large delta E effect of -120 GPa at 500 nm are also achieved. The soft magnetism, large delta E effect and piezomagnetic coefficient combined with ultra-low Gilbert damping constant make Fe-Ga-C thin film an attractive alloy for magnetoelectric and other voltage tunable RF/microwave device applications.