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

الموضوعات : Journal of Theoretical and Applied Physics

Chinedu E Ekuma ¹ , Ephriam O Chukwuocha ² , Michael C Onyeaju ³

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
3 - Department of Physics, Computational Material Physics Group, University of Port Harcourt

تاريخ التأكيد : 17 السبت , محرم, 1434 تاريخ الإصدار : 17 السبت , محرم, 1434

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

ملخص المقالة :

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.