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Strong Coupling of Antiferromagnetic Resonance with Subterahertz Cavity Fields

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Jean-Philippe Ansermet, Haiming Yu, Marcin Bialek
2021

Abstract

Strong coupling of electromagnetic cavity fields with antiferromagnetic spin waves in hematite (alpha-Fe2O3) is achieved above room temperature. A cube of hematite is placed in a metallic tube and the transmission is measured, using a continuous-wave terahertz spectrometer. The spectra, collected as a function of the temperature, reveal the formation of magnetic polaritons.

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https://infoscience.epfl.ch/entities/publication/4c322766-f45a-4445-9d6a-71d7107d595a

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Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured with a thermometer. Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for definition. The most common scales are the Celsius scale with the unit symbol °C (formerly called centigrade), the Fahrenheit scale (°F), and the Kelvin scale (K), the latter being used predominantly for scientific purposes.

Thermodynamic temperature

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