Thermomechanics of ferri-antiferromagnetic phase transition in finitely-strained rocks towards paleomagnetism

0578926 - ÚT 2025 RIV NL eng J - Journal Article
Roubíček, Tomáš
Thermomechanics of ferri-antiferromagnetic phase transition in finitely-strained rocks towards paleomagnetism.
Physica B-Condensed Matter. Roč. 674, February (2024), č. článku 415549. ISSN 0921-4526. E-ISSN 1873-2135
R&D Projects: GA ČR GA23-06220S
Institutional support: RVO:61388998
Keywords : deforming magnetic rock modelling * landau magnetic phase transition * large strains in Eulerian formulation * jeffreys viscoelastic rheology * rock-magma phase transition
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 2.8, year: 2022
Method of publishing: Open access
https://www.sciencedirect.com/science/article/pii/S092145262300916X?via%3Dihub

The thermodynamic model of visco-elastic deformable magnetic materials at finite strains is formulated in a fully Eulerian way in rates with the aim to describe thermoremanent paleomagnetism in crustal rocks. The Landau theory applied to a ferro-to-para-magnetic phase transition, the gradient theory for magnetization (leading to exchange energy) with general mechanically dependent coefficient, hysteresis in magnetization evolution by Gilbert equation involving objective corotational time derivative of magnetization, and demagnetizing field are considered in the model. The Jeffreys viscoelastic rheology is used with temperature-dependent creep to model solidification or melting transition. The model complies with energy conservation and the Clausius-Duhem entropy inequality.
Permanent Link: https://hdl.handle.net/11104/0352740