2007/12/01 by P. Piekarz, P Piekarz, K. Parlinski +3
Engineering · Materials Science · Physics and Astronomy · #Bauxite Residue and Utilization #Charge (physics) #Charge ordering #Landau theory #Magnetic Properties and Synthesis of Ferrites #Magnetite #Monoclinic crystal system #Phase (matter) #Phase transition #Softening #Symmetry (geometry) #X-ray Diffraction in Crystallography #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.1088/1742-6596/92/1/012164
published as Journal of Physics: Conference Series 92 (2007) 012164 · 4 pages, 1 figure
openalex publication_date 2007/12/01 · arxiv created 2008/01/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
The Verwey phase transition in magnetite is analyzed on the basis of the Landau theory. The free energy functional is expanded in a series of components belonging to the primary and secondary order parameters. A low-temperature phase with the monoclinic P2/c symmetry is a result of condensation of two order parameters X 3 and Δ 5 . The temperature dependence of the shear elastic constant C 44 is derived and the mechanism of its softening is discussed.