Magneto-elastic phase transition in a linear chain within the double and super-exchange model
Por:
Suárez J.R., Vallejo E., Navarro O., Avignon M.
Publicada:
1 may 2010
Resumen:
In this work a magneto-elastic phase transition in a linear chain was obtained due the interplay between magnetism and lattice distortion in a double and super-exchange model. We consider a linear chain consisting of classical localized spins interacting with itinerant electrons. Due to the double exchange interaction, localized spins align ferromagnetically. This ferromagnetic tendency is expected to be frustrated by the anti-ferromagnetic super-exchange interaction between neighbor localized spins. Additionally, the lattice parameter is allowed to have small changes, which contributes harmonically to the energy of the system. The phase diagram is obtained as a function of the electron density and the super-exchange interaction using a Monte Carlo minimization. At low super-exchange interaction energy phase transition between electron-full ferromagnetic distorted and electron-empty antiferromagnetic undistorted phases occurs. In this case all electrons and lattice distortions were fou
Filiaciones:
Suárez J.R.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Vallejo E.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Navarro O.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Avignon M.:
Institut Néel, Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier, BP 166, 38042 Grenoble Cedex 9, France
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