Effects of Topological Structures in Ribbons of Magnetic Amorphous Alloys

The strong magnetoelastic (ME) coupling in magnetic amorphous alloys (MAA) have been exploited for measuring a variety of physical parameters, such as mass, density, viscosity, humidity, or temperature. When a longitudinal magnetic field is applied, a ribbon of MAA also changes its length. If the magnetic field is then oscillated with variable frequency, a strong induced electromagnetic response (emf) can be detected in a pick-up coil when the oscillating frequency matches the mechanical resonance of the ribbon. In this talk, we will demonstrate how MAA ribbons can provide an elegant, yet relatively simple platform for studying the effects associate with topological structures in mechanical systems. We present experimental measurements of the effects of various hole structures on the vibrational modes of MAA ribbons and compare them with COMSOL numerical calculations.