A thermodynamic model for the simultaneous charge/spin order transition in LaCu3Fe4O12.

LaCu(3)Fe(4)O(12) undergoes a phase transition at 393 K from an antiferromagnetic insulating state at low temperatures to a paramagnetic metallic state above the critical temperature. We build a basic model for the electronic structure of this material that allows us to extract the mechanism that governs the transition and calculate the stability of the different phases. It also allows us to speculate on the effect of pressure on this material to build a T-p phase diagram.

Magnetoresistance effect in (La, Sr)MnO3 bicrystalline films.

The angular dependence of the magnetoresistance effect has been measured on bicrystalline La(0.75)Sr(0.25)MnO(3) films.

Anisotropic magnetoresistance in manganites: experiment and theory.

We present measurements of the anisotropic magnetoresistance (AMR) of La(0.75)Sr(0.25)MnO(3) films deposited on (001) SrTiO(3) substrates, and a model that describes the experimental results.

The effect of Coulomb interaction at ferromagnetic-paramagnetic metallic perovskite junctions.

We study the effect of Coulomb interactions in transition metal oxide junctions. In this paper we analyze charge transfer at the interface of a three layer ferromagnetic-paramagnetic-ferromagnetic metallic oxide system. We choose a charge model considering a few atomic planes within each layer and obtain results for the magnetic coupling between the ferromagnetic layers.

Pressure-induced insulator-metal transition in LaMnO(3): a slave-boson approach.

The recent observation of a pressure-induced insulator to metal (I-M) transition in pure LaMnO3 [I. Loa, Phys. Rev.