Reversible Thermal Hysteresis in Heating‐Cooling Cycles of Magnetic Susceptibility: A Fine Particle Effect of Magnetite

• Published in: Geophysical research letters Vol. 50; no. 6
• Main Authors: Zhang, Qi, Appel, Erwin
• Format: Journal Article
• Language: English
• Published: Washington John Wiley & Sons, Inc 28.03.2023; Wiley
• Subjects: Basalt; Clusters; Configurations; Cooling; Cycles; Dipole interactions; Grain boundaries; Haematite; Heating; Heating and cooling; Hematite; Hysteresis; Magnetic moments; Magnetic permeability; Magnetic properties; Magnetic susceptibility; Magnetite; Mineralogy; Nanoparticles; Particle size; Residual stress; Shape; Thermal relaxation

Thermomagnetic curves of magnetic susceptibility (κ) are key to characterizing magnetic properties. We report hump‐shaped κ‐T curves of magnetite‐bearing basalt during heating‐cooling cycles to ∼340°C, with a large thermal hysteresis and similar starting and ending values, even in multiple repeated...