Spin–lattice coupling in iron-pnictide superconductors: a model for possible continuous phase transition

Authors

• Chinedu E Ekuma ¹
• Ephriam O Chukwuocha ²
• Michael C Onyeaju ²

1. Department of Physics, Computational Material Physics Group, University of Port Harcourt;Department of Physics and Astronomy, Louisiana State University
2. Department of Physics, Computational Material Physics Group, University of Port Harcourt

Abstract

AbstractA systematic study of the dependence of the local magnetic moment, M, on the Fe-Pn layer separation has been carried out. Within the Ehrenfest classification of orders of phase transition, we propose a continuous (>2) phase transition for studying the dependence of M on the Fe-Pn layer separation. Our model is tested with available experimental data.

Keywords

• 74.70.Kn
• 82.35.Jk
• Continuous phase transition
• Ehrenfest theory
• Euler
• N
• Ginzburg
• Magnetic moment
• Lagrange equation
• Fe
• Landau theory
• 64.60.av
• Pnictide superconductors
• 74.20.De
• 74.40