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By exploring the simple periodic heat-flux principle of the photoacoustic cell we propose and demonstrate experimentally the usefulness of the photoacoustic cell for studying the ferromagnetic resonance. An interesting feature of this technique is that it offers special advantages over conventional spectroscopic methods used in ferromagnetic resonance because of the simplicity of measurements. An application is made for the case of an iron thin foil.

A simple low-temperature photoacoustic cell operating at the liquid N2 temperature is described. An application is made for monitoring the thermal agitation of a spin system close to its order–disorder critical temperature.

No abstract