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
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.
PACS: 75.30.-m – Intrinsic properties of magnetically ordered materials / 75.30.Et – Exchange and superexchange interactions / 71.10.-w – Theories and models of many electron systems
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999