Anomaly in the Temperature Dependence of the Coercive Force of an Ensemble of Ferromagnetic CrO2 Nanoparticles under Conditions of Percolation Conductivity

Аннотация

The temperature dependence of coercive force H_c(T) of pressed powders of ferromagnetic half metal CrO₂ is compared to the temperature dependence of the maximum field of positive tunneling magnetoresistance H_p(T). It is established that the multidomain alters the nature of the reverse magnetization of transport channels and violates relation H_p ≈ H_c at low temperatures (4.2–70 K).