Epitaxial-strain effect on charge/orbital order in Pr0.5Ca0.5MnO3 films (2009)
Okuyama, D., Nakamura, M., Wakabayashi, Y., Itoh, H., Kumai, R., Yamada, H., ...
Effect of growth orientation on charge- and orbital-ordering (CO-OO) phenomena has been studied for Pr0.5Ca0.5MnO3 epitaxial thin films fabricated on (LaAlO3)0.3-(SrAl0.5Ta0.5O3)0.7 (LSAT) substrates...
Okuyama, D., Tokunaga, Y., Kumai, R., Taguchi, Y., Arima, T., Tokura, Y.
The orbital shapes and charge disproportionations at nominal Mn$^{3+}$ and Mn$^{4+}$ sites for the charge- and orbital-ordered phases have been studied on half-doped manganites...
Fe-doping-induced evolution of charge-orbital ordering in a bicritical-state manganite (2007)
Sakai, H., Ito, K., Kumai, R., Tokura, Y.
Impurity effects on the stability of a ferromagnetic metallic state in a bicritical-state manganite, (La0.7Pr0.3)0.65Ca0.35MnO3, on the verge of metal-insulator transition have been investigated by...
Bandwidth-disorder phase diagram of half doped layered manganites (2006)
Mathieu, R., Uchida, M., Kaneko, Y., He, J. P., Yu, X. Z., Kumai, R., ...
Phase diagrams in the plane of $r_A$ (the average ionic radius, related to one-electron bandwidth $W$) and $\sigma^2$ (the ionic radius variance, measuring the quenched disorder), or...
Impurity-induced transition to a Mott insulator in Sr$_3$Ru$_2$O$_7$ (2005)
Mathieu, R., Asamitsu, A., Kaneko, Y., He, J. P., Yu, X. Z., Kumai, R., ...
The electrical, magnetic, and structural properties of Sr$_3$(Ru$_{1-x}$Mn$_x$)$_2$O$_7$ (0 $\leq x \leq$ 0.2) are investigated. The parent compound Sr$_3$Ru$_2$O$_7$ is a paramagnetic metal,...