Japanese version is here.
  

   Mar. 2004   M.S.  Department of Complexity Science and Engineering, University of Tokyo
   Mar. 2007   Ph. D Department of Complexity Science and Engineering, University of Tokyo
                Thesis:High-energy spectroscopic studies of GaN-based diluted magnetic semiconductors

Thesis

  12. "Systematic changes of the electronic structure of the diluted ferromagnetic oxide Li-doped Ni1-xFexO with hole doping"
   M. Kobayashi, J. I. Hwang, G. S. Song, Y. Ooki, M. Takizawa, A. Fujimori, Y. Takeda,
   S.-I. Fujimori, K. Terai, T. Okane, Y. Saitoh, H. Yamagami, Y.-H. Lin, and C.-W. Nan
   submitted to Phys. Rev. Lett.
   cond-mat/0711-4657

  11. "Depth profile photoemission study of thermally diffused Mn/GaAs (001) interfaces"
    Y. Osafune, G. S. Song, J. I. Hwang, Y. Ishida, M. Kobayashi, K. Ebata, Y. Ooki,
    A. Fujimori, J. Okabayashi, K. Kanai, K. Kubo, M. Oshima
   submitted to J. Appl. Phys.
   cond-mat/0711-3257v1

  10. "X-ray magnetic circular dichroism characterization of GaN/Ga1-xMnxN digital ferromagnetic heterostructure"
   J. I. Hwang, M. Kobayashi, G. S. Song, A. Fujimori, A. Tanaka,
   Z. S. Yang, H. J. Lin, D. J. Huang, C. T. Chen, H. C. Jeon and T. W. Kang
   Appl. Phys. Lett. 91 072507(2007) (DOI : 10.1063/1.2769944)
   cond-mat/0703477v3

  9. "Phase change observed in ultrathin Ba0.5Sr0.5TiO3 films by in situ resonant photoemission spectroscopy"
   Y.-H. Lin, K. Terai, H. Wadati, M. Kobayashi, M. Takizawa, J. I. Hwang, A. Fujimori,
   C.-W. Nan, J.-F. Li, S.-I. Fujimori, T. Okane, Y. Saitoh, and K. Kobayashi
   Appl. Phys. Lett. 90 222909(2007) (DOI : 10.1063/1.2745249)
   cond-mat/0705.3675

  8. "Depth profile high-energy spectroscopic study of Mn-doped GaN prepared by thermal diffusion"
   J. I. Hwang, Y. Osafune, M. Kobayashi, K. Ebata, Y. Ooki, Y. Ishida,
   A. Fujimori, Y. Takeda, T. Okane, Y. Saitoh, K. Kobayashi and A. Tanaka
   J. Appl. Phys. 101 103709(2007) (DOI : 10.1063/1.2732679)
   cond-mat/0703429v1

  7. "Soft x-ray magnetic circular dichroism study of weakly ferromagnetic Zn1-xVxO thin film"
   Y. Ishida, J. I. Hwang, M. Kobayashi, Y. Takeda, K. Mamiya, J. Okamoto,
   S.-I. Fujimori, T. Okane, K. Terai, Y. Saitoh, Y. Muramatsu, A. Fujimori,
   A. Tanaka, H. Saeki, T. Kawai, and H. Tabata
   Appl. Phys. Lett. 90 022510 (2007) (DOI : 10.1063/1.2431571)
   cond-mat/0609173

  6. "Depth profile study using x-ray photoemission spectroscopy of Mn-doped GaN
   prepared by thermal diffusion of Mn "

   J. I. Hwang, Y. Osafune, M. Kobayashi, K. Ebata, Y. Ooki, Y. Ishida,
   A. Fujimori, A. Tanaka, Y. Takeda, T. Okane, Y. Saitoh and K. Kobayashi
   AIP Conference Proceedings 893 1225 (2007) (DOI : 10.1063/1.2730341)

  5. "Photoemission and x-ray absorption studies of the electronic structure of GaN-based
   diluted magnetic semiconductors"

   J. I. Hwang, Y. Ishida, M. Kobayashi, Y. Osafune, T. Mizokawa, A. Fujimori,Y. Takeda, K. Terai,
   S-i. Fujimori, Y. Saito, Y. Muramatsu, A. Tanaka, T. Kondo and H. Munekata, M. Hashimoto,
   H. Tanaka, S. Hasegawa and H. Asahi
   physica status solidi b 243 1696 (2006) (DOI : 10.1002/pssb.200565329)

  4. "Characterization of Magnetic Components in the Diluted Magnetic Semiconductor
   Zn1-xCoxO by X-ray Magnetic Circular Dichroism"

   M. Kobayashi, Y. Ishida, J. I. Hwang, T. Mizokawa, A. Fujimori, J. Okamoto, K. Mamiya, Y. Takeda,
   T. Okane, Y. Saitoh, Y. Muramatsu, A. Tanaka, H. Saeki, H. Tabata, and T. Kawai
   Phys. Rev. B 72 201201(R) (2005) (DOI : 10.1103/PhysRevB.72.201201)
   cond-mat/0505387

  3. "High-energy spectroscopic study of the III-V nitride-based diluted magnetic semiconductor Ga1-xMnxN"
   J. I. Hwang, Y. Ishida, M. Kobayashi, H. Hirata, K. Takubo, T. Mizokawa and A. Fujimori,
   J. Okamoto, K. Mamiya, Y. Saito, Y. Muramatsu, H. Ott, A. Tanaka, T. Kondo and H. Munekata
   Phys. Rev. B 72 085216 (2005) (DOI : 10.1103/PhysRevB.72.085216)
   cond-mat/0504048

  2. "Photoemission Study of the Room Temperature Ferromagnet Zn1-xVxO"
   Y. Ishida, J. I. Hwang, M. Kobayashi, A. Fujimori, H. Saeki, H. Tabata and T. Kawai
   Physica B 351 304 (2004) (DOI : 10.1016/j.physb.2004.06.037)

  1. "In situ Photoemission Spectroscopy of the Room Temperature Ferromagnet ZnGeP2:Mn"
   Y. Ishida, D. D. Sarma, K. Okazaki, J. Okabayashi, J. I. Hwang, H. Ott, A. Fujimori, G.A. Medvedkin,
   T. Ishibashi and K. Sato
   Phys. Rev. Lett. 91 107202 (2003) (DOI : 10.1103/PhysRevLett.91.107202)


International Conference

    11th Physics and Applications of Spin-related Phenomena in Semiconductors (PASPS11), Kashiwa, Japan, Dec. 14-15, 2006.
   "Resonant photoemission and x-ray magnetic circular dichroism study of
    GaN/Ga1-xMnxN digital ferromagnetic heterostructure"
    (Late news contribution, poster presentation)

   J. I. Hwang, M. Kobayashi, G. S. Song, A. Fujimori, Y. Takeda, K. Terai, S.-i. Fujimori, T. Okane, Y. Saitoh, H. Yamagami,
   A. Tanaka, C. S. Yang, H. J. Lin, D. J. Huang , C. T. Chen, H. C. Jeon and T. W. Kang

    28th International Conference on the Physics of Semiconductors (ICPS28), Vienna, Austria, Jul. 24 - 28, 2006.
   "High-energy spectroscopic study of Mn-doped GaN prepared by thermal diffusion of Mn"
   (Poster presentation)

   Jong-Il Hwang, Yoshitaka Osafune, Masaki Kobayashi, Kazuaki Ebata, Yasuhiro Ooki,
   Yukiaki Ishida, Atsushi Fujimori, Arata Tanaka, Yukiharu Takeda, Tetsuo Okane,
   Yuji Saitoh, Keisuke Kobayashi.

    The 6th Taiwan-Korea-Japan Symposium on Strongly Correlated Electron Systems, Taiwan, Nov. 30 - Dec. 3, 2005.
   "High-energy spectroscopic study of Mn-doped GaN prepared by thermal diffusion of Mn"
   (Poster presentation)

   J. I. Hwang, Y. Osafune, M. Kobayashi, K. Ebata, Y. Ooki, Y. Ishida, A. Fujimori, Y. Takeda
   T. Okane, Y. Saitoh and K. Kobayashi.   

    6th International Conference on Nitride Semiconductors (ICNS6), Bremen, Germany, Aug 28 - Sep 2, 2005.
   "Photoemission and x-ray absorption studies of the electronic structure of
   GaN-based diluted magnetic semiconductors"
   (Oral presentation)

   J. I. Hwang, Y. Ishida, M. Kobayashi, Y. Osafune, T. Mizokawa, A. Fujimori,Y. Takeda, K. Terai,
   S-i. Fujimori, Y. Saito, Y. Muramatsu, A. Tanaka, T. Kondo and H. Munekata, M. Hashimoto,
   H. Tanaka, S. Hasegawa and H. Asahi.

   The 5th Korea-Japan-Taiwan Symposium on Strongly Correlated Electron Systems, Korea, Dec. 10-11, 2004.
   "Photoemission study of the Mn-doped wurtzite GaN"
   (Poster presentation)

   J. I. Hwang, Y. Ishida, M. Kobayashi, Y. Osafune, A. Fujimori, T. Kondo and H. Munekata.   

   10th Physics and Applications of Spin-related Phenomena in Semiconductors (PASPS10), Japan, Jun. 10-11, 2004.
   "X-ray photoemission study of the nitride-based diluted magnetic semiconductor Ga1-xMnxN"
   (Oral presentation)

   J. I. Hwang, Y. Ishida, M. Kobayashi, K. Takubo, T. Mizokawa, A. Fujimori, T. Kondo and H. Munekata.