Eur. Phys. J. B 7, 509-512 (1999)
https://doi.org/10.1007/s100510050639

Coexistence of antiferromagnetic and ferromagnetic phase for ferromagnetic Kondo lattice model

¹ National Creative Research Initiative Center for Superconductivity, Pohang University of Science and Technology, Pohang 790-784, Korea
² Department of Physics, Sogang University, Seoul 121-742, Korea
³ Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea

Received: 1 September 1998
Revised: 30 October 1998
Accepted: 27 November 1998
Published online: 15 February 1999

Abstract

To study the proposed phase separations in doped manganites, we performed Monte-Carlo calculations for the ferromagnetic Kondo lattice model with strong Hund's coupling between conduction electrons and localized spins. For the practical calculations, we adopted a one dimensional lattice and treated the spins of the localized electrons semi-classically. A direct evidence of the phase separation is observed from a snapshot of the spatial dependence of localized spins. No indication of the canted or spiral phases is found in the results of simulations. Further, the calculated results of the spin structure factor in the phase separation region are well compared with recent experiments.