Microwave Characterization of Amorphous Fe₇₂Cu₁V₄Si₁₅B₈ Ribbons: De-Embedding Analysis

This study presents a combined theoretical, simulation-based, and experimental approach for high-frequency characterization of amorphous ferromagnetic materials using microwave techniques. A custom de-embedding algorithm was applied to remove systematic errors introduced by the conductive lines of the test fixture, with supporting electromagnetic simulations performed in CST Studio Suite and measurements on Fe72Cu1V4Si15B8 ribbons using a Vector Network Analyzer (VNA). In addition to the giant magnetoimpedance (GMI) effect of approximately 228% under high magnetic excitation, a negative magnetoresistance was observed around 1500 MHz.