Metal-insulator transitions are accompanied by huge resistivity changes, even over tens of
orders of magnitude, and are widely observed in condensed-matter systems. This article …

Complex cobalt oxides known as cobaltites are reviewed, including LnCoO 3-based
perovskite-structured rare-earth cobaltites (where Ln is lanthanum or a lanthanide), quasi …

We present the results of a comprehensive investigation of the dc magnetization, ac
susceptibility, and magnetotransport properties of the glassy ferromagnet La 1− x Sr x CoO …

This is a revised version of the first edition published in 1991. At the same time, this is a
revised version of the Syokabo edition, which was written in Japanese and published in …

We present soft-x-ray-absorption spectra (XAS) of LaCoO 3 taken at different temperatures
(80–630 K). The shape of the multiplets in the Co 2p XAS spectra conveys information on …

Neutron-diffraction measurements have revealed a new anomalous thermal lattice
expansion of LaCoO 3 near 500 K that indicates the existence of a second spin-state …

We have studied the electronic structure of LaCoO 3 by photoemission spectroscopy and x-
ray absorption spectroscopy (XAS). The Co 2p core-level and valence-band photoemission …

Spin-Glass Behavior and Magnetic Phase Diagram Page 1 Journal of the Physical Society of
Japan Vol. 63, No. 4, April, 1994, pp. 1486-1493 Spin-Glass Behavior and Magnetic Phase …

The spin gap energy (≈ 30 meV) associated with the low-spin (S= 0) to high-spin (S= 2)
transition in LaCo O 3 was proved to be considerably smaller than the charge gap energy …

Infrared spectroscopy of a LaCoO 3 crystal has revealed anomalous splitting of the phonon
modes as well as their intensity variation with temperature during the spin-state transition …