K. Takubo

Signature of carrier-induced ferromagnetism in Ti(1-x)Co(x)O(2-delta): exchange interaction between high-spin Co2+ and the Ti 3d conduction band.

X-ray photoemission spectroscopy measurements were performed on thin-film samples of rutile Ti(1-x)Co(x)O(2-delta) to reveal the electronic structure. The Co 2p core-level spectra indicate that the Co ions take the high-spin Co2+ configuration, consistent with substitution on the Ti site. The high-spin state and the shift due to the exchange splitting of the conduction band suggest strong hybridization between carriers in the Ti 3d t(2g) band and the t(2g) states of the high-spin Co+2 . These observations support the argument that room temperature ferromagnetism in Ti(1-x)Co(x)O(2-delta) is intrinsic.

High-energy spectroscopic study of the III-V nitride-based diluted magnetic semiconductor Ga1 xMnxN

We have studied the electronic structure of the diluted magnetic semiconductor

Unusual superexchange pathways in an NiS2 triangular lattice with negative charge-transfer energy.

{\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{N}

In-gap state and effect of light illumination in CuIr2S4 probed by photoemission spectroscopy

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Observation of photoinduced phase transition in phase-separated Pr0.55 (Ca1-y Sry) 0.45 Mn O3 thin films via x-ray photoemission spectroscopy

x=0.0

Photo-Induced In-Gap States in SrTiO3 Probed by Photoemission Spectroscopy under Ultraviolet Illumination

, 0.02, and 0.042) grown on Sn-doped

High-temperature thermoelectric properties of Delafossite oxide CuRh1-xMgxO2

n

Electronic Structure of Superconducting and Non-superconducting Pr2Ba4Cu7O15-δ Revealed by Photoemission Spectroscopy

-type GaN using photoemission and soft x-ray absorption spectroscopy. Mn

Photoemission study of temperature-induced and photoinduced spin-state transitions in spin-crossover complex [Fe(ptz)6](BF4)2

L

Capturing ultrafast magnetic dynamics by time-resolved soft x-ray magnetic circular dichroism

-edge x-ray absorption have indicated that the Mn ions are in the tetrahedral crystal field and that their valence is divalent. Upon Mn doping into GaN, new states were found to form within the band gap of GaN, and the Fermi level was shifted downward. Satellite structures in the Mn