Changes of electrical conductivity in the vicinity of the curie temperature of basaltic rocks — theoretical model

Summary Samples of basalts, haematites and magnetites display either temporary or permanent (magnetite) weakening of the increase of the electrical conductivity with increasing temperature in the vicinity of their Curie temperature. Using the second quantization, this paper explains the observed pattern of the electrical conductivity adequately for magnetite and approximately for the other rocks by means of a quantum theory model of ferromagnetic minerals. This theory describes only the electron component of the electrical conductivity, which is responsible for the Curie temperature effect.Dedicated to RNDr. Jan Pícha, CSc., on his 60th Birthday