Explanation
Also known as electron spin resonance. Under the simultaneous action of a constant (DC) magnetic field and a high frequency (microwave) magnetic field perpendicular to the paramagnetism material containing unpaired electrons, when the constant magnetic field intensity H and the angular frequency of the high frequency magnetic field ω The strong absorption of high-frequency electromagnetic fields by this substance when certain conditions are met. The principle can be explained by classical phenomenological theory or quantum mechanics theory.
Classification
Fundamental of Material Science -> Analysis and testing technology of materials