Impurity effects on charge ordering (CO) as well as magnetic ground states in perovskite-
type manganites are investigated. We found that the CO state becomes short-ranged with a …

Comprehensive study on electronic and magnetic properties has been performed for doped
manganite near the phase boundary of the antiferromagnetic metallic (AFM) state, with …

We present an exact diagonalization study for perovskite manganites using an effective
Hamiltonian which includes a coupling between the spin and orbital degrees of freedom …

The spin and orbital phase diagram for perovskite manganites is investigated as a function
of temperature and hole concentration. The superexchange and double exchange …

A theory is developed to explain various types of electronic collective behaviors in doped
manganites R 1− x X x MnO 3 (R= La, Pr, Nd, etc. and X= Ca, Sr, Ba, etc.). Starting from a …

Roles of orbital degree of freedom of Mn ions in phase transition as functions of temperature
and hole concentration in perovskite manganites are studied. It is shown that the orbital …

The role of lattice distortion in the charge, orbital, and spin ordering in half-doped
manganites has been investigated. For fixed magnetic ordering, we show that the …

In an A-site ordered perovskite manganite Sm 1/2 Ba 1/2 MnO 3, a new charge/orbital
ordering pattern was found at room temperature. Electron diffraction studies revealed a …

抄録 Possible ordered phases in perovskite manganites are investigated in the framework of
an effective spin Hamiltonian for the atomic limit. Using the mean-field approximation …

We have investigated the microstructure related to the charge and orbital ordering in the
manganites Pr 0.5 Ca 0.5 MnO 3 by transmission electron microscopy. Electron diffraction …