Abstract Effects of chemical and external pressures have been investigated on the two types
of charge-ordering (CO) systems of perovskite manganites with the use of single-crystal …

Both internal chemical pressure by ion substitution and external hydrostatic pressure induce
an insulator-to-metal (IM) transition in the Pr 1− x Ca x MnO 3 system. The behavior of spin …

The structural and magnetic transitions in two Mn 3+/Mn 4+(1: 1) systems have been
investigated using neutron diffraction and electron microscopy. In Pr 0.5 Ca 0.5 MnO 3, the …

Charge ordering occurs in some mixed-valent transition metal oxides. The perovskite
manganates of the formula Ln1-x A x MnO3 (Ln= rare earth; A= Ca, Sr) are especially …

Pr 1− x Ca x MnO 3 in the doping range between 0.3< x< 0.5 represent an extremely
interesting manganite system for the study of the interplay of different kinds of ordering …

The phase change from a charge-and orbital-ordered insulator to a ferromagnetic metal has
been investigated for single crystals of Pr 0.55 (Ca 1− y Sr y) 0.45 MnO 3 with controlled one …

A detailed study of the properties of Pr 1− x Ca x MnO 3 shows that for a range of
compositions (0.3≤ x< 0.5) there is a first-order magnetic-field-induced insulator-metal …

The metal-insulator (MI) phase transitions relevant to charge ordering (CO) have been
investigated for perovskite-type (N d 1− y Sm y) 1/2 Sr 1/2 MnO 3 (0<~ y<~ 1) crystals, in …

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 …

Without a magnetic field Pr 0.7 Ca 0.3 MnO 3 exhibits three phase transitions: a change of
the lattice symmetry at TB= 200 K, an antiferromagnetic ordering at TN= 140 K, and a canted …