Ferromagnetic resonance is an important topic in magnetism even in solid state physics. It is the basis of microwave ferrite physics. Microwave ferrite has important applications in radar and microwave communications. This microwave ferromagnetic resonance apparatus is an experimental instrument for measuring the ferromagnetic resonance curve of ferromagnetic samples. It can be used to measure the resonance spectral lines of YIG mono-crystal and poly-crystal samples, determine parameters such as g-factor/gyromagnetic ratio γ/resonance line wide ΔH/relaxation time τ, and analyze the characteristics of a microwave system.
Using this apparatus, the following experiments can be conducted:
1. Understand the principle and experimental conditions of microwave ferromagnetic resonance.
2. Recognize the characteristics of magnetic resonance through ferromagnetic resonance phenomenon.
3. Observe the ferromagnetic resonance signal of a YIG polycrystalline small ball sample on oscilloscope.
4. Determine the resonance magnetic field, g-factor, and gyromagnetic ratio of a mono-crystal sample.
5. Measure magnetic field versus output power of the resonant cavity using digital galvanometer.
6. Determine resonance magnetic field, resonance line width, and relaxation time of YIG polycrystalline sample.
7. Determine the relationship of resonance magnetic field with angle θ of an oriented YIG mono-crystal sample.
8. Determine the resonance magnetic field intensities H0/H0 of the easy/hard magnetized axes.
9. Calculate the anisotropy constant K1 and g-factor.