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| FIG 1. Schematic diagram of the broadband ferromagnetic resonance (FMR) spectrometer: |
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| The spectrometer operates between 1 GHz and 7 GHz. The use of a strip transmission line for excitation gives the system its broad band capability. The magnetic sample is mounted in the strip-line device in such a way that the microwave magnetic field is in the plane of the sample. The magnet can be rotated so that the applied static field can be changed from in-plane to out-of-plane configuration and angle dependent measurements can be taken. The signal from the diode detector is detected through the lock-in amplifier. A typical resonance spectrum is represented in Figure 2. |
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| FIG 2 A typical FMR derivative curve. The sample used was a permalloy film, 100 nm thick, and the applied static field was in the plane of the film. The microwave frequency was 3.5 GHz |
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