M. Kobayashi

activity

20042018

most citedEffect of Reducing Atmosphere on the Magnetism of Zn1-xCoxO Nanoparticles

207 citations · 772 across the 21 of their papers we have counts for

collaborators

Showing cond-mat.mtrl-sciShow all

16 papers · 1 filter

cond-mat.mtrl-sci2011★ 22 cited

Bulk and Surface Magnetization of Co atoms in Rutile Ti_[1-x]Co_xO_[2-delta] Thin Films Revealed by X-Ray Magnetic Circular Dichroism

V. R. Singh, Y. Sakamoto, T. Kataoka +10

We have studied magnetism in Ti_[1-x]Co_xO_[2-δ] thin films with various x and δby soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L_[2,3] absorption edges. Th…

cond-mat.mtrl-sci2008★ 7 cited

Electronic structure of Ga $_{1 - x}$ Cr $_{x}$ N and Si-doping effects studied by photoemission and X-ray absorption spectroscopy

G. S. Song, M. Kobayashi, J. I. Hwang +17

The electronic structure of the magnetic semiconductor Ga $_{1 - x}$ Cr $_{x}$ N and the effect of Si doping on it have been investigated by photoemission and soft x-ray absorption spect…

cond-mat.mtrl-sci2008★ 17 cited

Local electronic structure of Cr in the II-VI diluted ferromagnetic semiconductor Zn $_{1 - x}$ Cr $_{x}$ Te

M. Kobayashi, Y. Ishida, J. I. Hwang +16

The electronic structure of the Cr ions in the diluted ferromagnetic semiconductor Zn $_{1 - x}$ Cr $_{x}$ Te ( $x = 0.03$ and 0.15) thin films has been investigated using x-ray magnetic circ…

cond-mat.mtrl-sci2008★ 10 cited

Hybridization between the conduction band and 3d orbitals in the oxide-based diluted magnetic semiconductor In $_{2 - x}$ V $_{x}$ O $_{3}$

M. Kobayashi, Y. Ishida, J. I. Hwang +11

The electronic structure of In $_{2 - x}$ V $_{x}$ O $_{3}$ ( $x = 0.08$ ) has been investigated using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). The V $2 p$ core-le…

cond-mat.mtrl-sci2008★ 42 cited

Nature of magnetic coupling between Mn ions in as-grown Ga $_{1 - x}$ Mn $_{x}$ As studied by x-ray magnetic circular dichroism

Y. Takeda, M. Kobayashi, T. Okane +12

The magnetic properties of as-grown Ga $_{1 - x}$ Mn $_{x}$ As have been investigated by the systematic measurements of temperature and magnetic field dependent soft x-ray magnetic circu…

cond-mat.mtrl-sci2007★ 9 cited

Systematic changes of the electronic structure of the diluted ferromagnetic oxide Li-doped Ni $_{1 - x}$ Fe $_{x}$ O with hole doping

M. Kobayashi, J. I. Hwang, G. S. Song +11

The electronic structure of Li-doped Ni $_{1 - x}$ Fe $_{x}$ O has been investigated using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). The Ni $2 p$ core-level…

cond-mat.mtrl-sci2007★ 15 cited

Photoemission and x-ray absorption studies of valence states in (Ni,Zn,Fe,Ti) $_{3}$ O $_{4}$ thin films exhibiting photo-induced magnetization

M. Kobayashi, Y. Ooki, M. Takizawa +11

By means of photoemission and x-ray absorption spectroscopy, we have studied the electronic structure of (Ni,Zn,Fe,Ti) $_{3}$ O $_{4}$ thin films, which exhibits a cluster glass behav…

cond-mat.mtrl-sci2007★ 5 cited

Depth profile photoemission study of thermally diffused Mn/GaAs (001) interfaces

Y. Osafune, G. S. Song, J. I. Hwang +9

We have performed a depth profile study of thermally diffused Mn/GaAs (001) interfaces using photoemission spectroscopy combined with Ar $^{+}$ -ion sputtering. We found that Mn ion wa…

cond-mat.mtrl-sci2007★ 11 cited

X-ray magnetic circular dichroism and photoemission study of the diluted ferromagnetic semiconductor Zn $_{1 - x}$ Cr $_{x}$ Te

Y. Ishida, M. Kobayashi, J. I. Hwang +10

We have performed x-ray magnetic circular dichroism (XMCD) and valence-band photoemission studies of the diluted ferromagnetic semiconductor Zn $_{1 - x}$ Cr $_{x}$ Te. XMCD signals due to…

cond-mat.mtrl-sci2007★ 5 cited

Phase Change Observed in Ultrathin Ba0.5Sr0.5TiO3 Films by in-situ Resonant Photoemission Spectroscopy

Y. -H. Lin, K. Terai, H. Wadati +10

Epitaxial Ba0.5Sr0.5TiO3 thin films were prepared on Nb-doped SrTiO3 (100)substrates by the pulsed laser deposition technique, and were studied by measuring the Ti 2p - 3d resonant…

cond-mat.mtrl-sci2007★ 16 cited

X-ray magnetic circular dichroism characterization of GaN/Ga1-xMnxN digital ferromagnetic heterostructure

J. I. Hwang, M. Kobayashi, G. S. Song +8

We have investigated the magnetic properties of a GaN/Ga1-xMnxN (x = 0.1) digital ferromagnetic heterostructure (DFH) showing ferromagnetic behavior using soft x-ray absorption spe…

cond-mat.mtrl-sci2007★ 10 cited

Depth profile high-energy spectroscopic study of Mn-doped GaN prepared by thermal diffusion

J. I. Hwang, Y. Osafune, M. Kobayashi +9

We have performed an $in$ - $s i t u$ depth profile study of Mn-doped GaN prepared by a low temperature thermal diffusion method using photoemission and x-ray absorption spectroscopy. I…

cond-mat.mtrl-sci2006★ 22 cited

Soft x-ray magnetic circular dichroism study of weakly ferromagnetic Zn $_{1 - x}$ V $_{x}$ O thin film

Y. Ishida, J. I. Hwang, M. Kobayashi +13

We performed a soft x-ray magnetic circular dichroism (XMCD) study of a Zn $_{1 - x}$ V $_{x}$ O thin film which showed small ferromagnetic moment. Field and temperature dependences of V 2…

cond-mat.mtrl-sci2005★ 207 cited

Effect of Reducing Atmosphere on the Magnetism of Zn1-xCoxO Nanoparticles

M. Naeem, S. K. Hasanain, M. Kobayashi +4

We report the crystal structure and magnetic properties of Zn1-xCoxO nanoparticles synthesized by heating metal acetates in organic solvent. The nanoparticles were crystallized in…

cond-mat.mtrl-sci2005★ 139 cited

Characterization of Magnetic Components in the Diluted Magnetic Semiconductor Zn $_{1 - x}$ Co $_{x}$ O by X-ray Magnetic Circular Dichroism

M. Kobayashi, Y. Ishida, J. l. Hwang +12

We report on the results of x-ray absorption (XAS), x-ray magnetic circular dichroism (XMCD), and photoemission experiments on {\it n}-type Zn $_{1 - x}$ Co $_{x}$ O ( $x = 0.05$ ) thin film,…

cond-mat.mtrl-sci2005★ 74 cited

High-energy spectroscopic study of the III-V nitride-based diluted magnetic semiconductor Ga $_{1 - x}$ Mn $_{x}$ N

J. I. Hwang, Y. Ishida, M. Kobayashi +12

We have studied the electronic structure of the diluted magnetic semiconductor Ga $_{1 - x}$ Mn $_{x}$ N ( $x$ = 0.0, 0.02 and 0.042) grown on Sn-doped $n$ -type GaN using photoemission an…

Bulk and Surface Magnetization of Co atoms in Rutile Ti_[1-x]Co_xO_[2-delta] Thin Films Revealed by X-Ray Magnetic Circular Dichroism

Electronic structure of Ga1−x​Crx​N and Si-doping effects studied by photoemission and X-ray absorption spectroscopy

Local electronic structure of Cr in the II-VI diluted ferromagnetic semiconductor Zn1−x​Crx​Te

Hybridization between the conduction band and 3d orbitals in the oxide-based diluted magnetic semiconductor In2−x​Vx​O3​

Nature of magnetic coupling between Mn ions in as-grown Ga1−x​Mnx​As studied by x-ray magnetic circular dichroism

Systematic changes of the electronic structure of the diluted ferromagnetic oxide Li-doped Ni1−x​Fex​O with hole doping

Photoemission and x-ray absorption studies of valence states in (Ni,Zn,Fe,Ti)3​O4​ thin films exhibiting photo-induced magnetization