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Name Hirokazu Fujiwara

 

Belonging Thin film physical properties study laboratory D3

 Research Fellowship for Young Scientists, DC1 (JSPS)

 

Research Ferromagnets, Topological materials, Spin-resolved ARPES

 

Hometown Okayama Prefecture, Japan

 

Research achievement

Paper

Observation of intrinsic half-metallic behavior of CrO2 (100) epitaxial films by bulk-sensitive spin-resolved PES

Hirokazu Fujiwara, Masanori Sunagawa, Kensei Terashima, Tomoko Kittaka, Takanori Wakita, Yuji Muraoka, Takayoshi Yokoya

J. Electron Spectrosc. Relat. Phenom. 220, 46 (2017).

 

Intrinsic spin polarized electronic structure of CrO2 epitaxial film revealed by bulk-sensitive spin-resolved photoemission spectroscopy

Hirokazu Fujiwara, Masanori Sunagawa, Kensei Terashima, Tomoko Kittaka, Takanori Wakita, Yuji Muraoka, and Takayoshi Yokoya

Appl. Phys. Lett. 106, 202404 (2015).

 

Evolution of the remnant Fermi-surface state in the lightly doped correlated spin-orbit insulator Sr2-xLaxIrO4

K. Terashima, M. Sunagawa, H. Fujiwara, T. Fukura, M. Fujii, K. Okada, K. Horigane, K. Kobayashi, R. Horie, J. Akimitsu, E. Golias, D. Marchenko, A. Varykhalov, N. L. Saini, T. Wakita, Y. Muraoka, T. Yokoya

Phys. Rev. B 96, 041106 (2017).

 

Direct observation of double valence-band extrema and anisotropic effective masses of the thermoelectric material SnSe

T. Nagayama, K. Terashima, T. Wakita, H. Fujiwara, T. Fukura, Y. Yano, K. Ono, H. Kumigashira, O. Ogiso, A. Yamashita, Y. Takano, H. Mori, H. Usui, M. Ochi, K. Kuroki, Y. Muraoka, and T. Yokoya

Jpn. J. Appl. Phys. 57, 010301 (2018).

 

Unusual upper critical field behavior in Nb-doped bismuth selenides

K. Kobayashi, T. Ueno, H. Fujiwara, T. Yokoya, and J. Akimitsu.

Phys. Rev. B 95, 180503(R) (2017).

 

Ce 4f electronic states of CeO1xFxBiS2 studied by soft x-ray photoemission spectroscopy
Takanori Wakita, Kensei Terashima, Takahiro Hamada, Hirokazu Fujiwara, Makoto Minohara, Masaki Kobayashi, Koji Horiba, Hiroshi Kumigashira, Galif Kutluk, Masanori Nagao, Satoshi Watauchi, Isao Tanaka, Satoshi Demura, Hiroyuki Okazaki, Yoshihiko Takano, Yoshikazu Mizuguchi, Osuke Miura, Kozo Okada, Yuji Muraoka, and Takayoshi Yokoya
Phys. Rev. B 95, 085109 (2017).

 

Pressure-dependent magnetization and magnetoresistivity studies on tetragonal FeS (mackinawite): revealing its intrinsic metallic character

S J Denholme, H Okazaki, S Demura, K Deguchi, M Fujioka, T Yamaguchi, H Takeya, M ElMassalami, H Fujiwara, T Wakita, T Yokoya and Y Takano 

Sci. Technol. Adv. Mater. 15, 055007 (2014). 

 

Comparaive ARPES studied of LaOxF1-xBiS2x=0.23 and 0.46)」

K Terashima, T Wakita, M Sunagawa, H Fujiwara, T Nagayama, K Ono, H Kumigashira, M Nagao, S Watauchi, I Tanaka, H Okazaki, Y Takano, Y Mizuguchi, H Usui, K Kuroki, Y Muraoka and T Yokoya

J. Phys: Conference Series 683, 012002 (2016).

 

Bulk sensitive angle-resolved photoelectron spectroscopy on Nd(O,F)BiS2

K Terashima, J Sonoyama, M Sunagawa, H Fujiwara, T Nagayama, T Muro, M Nagao, S Watauchi, I Tanaka, H Okazaki, Y Takano, Y Mizuguchi, H Usui, K Suzuki, K Kuroki, T Wakita, Y Muraoka and T Yokoya

J. Phys: Conference Series 683, 012003 (2016).

 

Observation of a Hidden Hole-Like Band Approaching the Fermi Level in K-Doped Iron Selenide Superconductor

Masanori Sunagawa, Kensei Terashima, Takahiro Hamada, Hirokazu Fujiwara, Tetsushi Fukura, Aya Takeda, Masashi Tanaka, Hiroyuki Takeya, Yoshihiko Takano, Masashi Arita, Kenya Shimada, Hirofumi Namatame, Masaki Taniguchi, Katsuhiro Suzuki, Hidetomo Usui, Kazuhiko Kuroki, Takanori Wakita, Yuji Muraoka, and Takayoshi Yokoya

J. Phys. Soc. Jpn. 85, 073704 (2016).

 

 

Meeting

Intrinsic electronic structure of high-quality CrO2 epitaxial film prepared by a closed-system CVD method(invited)

Hirokazu Fujiwara

Energy Materials and Nanotechnology (EMN) Meeting on Epitaxy 2018, Vienna, Austria (June 2018)

 

Finite Temperature Effects in Half-metal CrO2 Studied by Bulk-sensitive Spin-resolved Photoemission Spectroscopy

Hirokazu Fujiwara, Masanori Sunagawa, Kensei Terashima, Tomoko Kittaka, Makoto Ogata, Takanori Wakita, Yuji Muraoka, Takayoshi Yokoya

International Workshop on Superconductivity and Related Functional Materials (IWSRFM) 2016, Tsukuba, Japan

 

Observation of Intrinsic Half-metallic Behavior of CrO2 (100) Epitaxial Films by Bulk-sensitive Spin-resolved PES

H. Fujiwara, M. Sunagawa, K. Terashima, T. Kittaka, T. Wakita, Y. Muraoka, and T. Yokoya

The 39th International conference on Vacuum Ultraviolet and X-ray Physics, Zurich, Switzerland (July 2016)

 

Bulk sensitive spin- and angle-resolved photoemission spectroscopy of half-metallic ferromagnet CrO2

H. Fujiwara, M. Sunagawa, T. Kittaka, K. Terashima, T. Wakita, Y. Muraoka, T. Yokoya

Ushimado International Workshop on Physics and Chemistry of Novel Superconductors and Related Materials, Okayama, Japan, (November 2014)

 

Origins of spin depolarization in half-metal CrO2: High-resolution spin-resolved photoemission spectroscopy study

Hirokazu Fujiwara, K. Terashima, M. Sunagawa, Y. Yano, F. Yoshii, Y. Matsuura, M. Ogata, K. Yaji, A. Harasawa, K. Kuroda, S. Shin, T. Wakita, Y. Muraoka, T. Yokoya

The 65th JSAP Spring Meeting

 

Observation of spin depolarization in half-metal CrO2 by high resolution spin-resolved photoemission spectroscopy

Hirokazu FujiwaraK. TerashimaM. SunagawaY. YanoM. OgataK. YajiA. HarasawaS. ShinT. WakitaY. MuraokaT. Yokoya

JPS Fall Meeting 2017

 

Observation spin depolarization due to thermal fluctuation in half-metal CrO2: High-resolution spin-resolved PES

Hirokazu Fujiwara, Masanori Sunagawa, Kensei Terashima, Makoto Ogata, Koichiro Yaji, Ayumi Harasawa, Shik Shin, Takanori Wakita, Yuji Muraoka, Takayoshi Yokoya

JPS Spring Meeting 2017

 

Intrinsic half-metallicity of CrO2 revealed by bulk-sensitive spin-resolved photoemission spectroscopy

Hirokazu Fujiwara, Masanori Sungawa, Kensei Terashima, Tomoko Kittaka Makoto Ogata, Takanori Wakita, Yuji Muraoka, Takayoshi Yokoya

JSAP Fall Meeting 2016

 

Observation of metallic surface states on CrO2 (001) films by depth-resolved photoemission spectroscopy

Hirokazu Fujiwara, Masanori Sunagawa, Tomoko Kittaka, Takanori Wakita, Kensei Terashima, Takanobu Nagayama, Makoto Ogata, Yuka Matsuura, Fumiya Yoshii, Shin-ichiro Ideta, Kiyohisa Tanaka, Yuji Muraoka, Takayoshi Yokoya

JSAP Fall Meeting 2016

 

Intrinsic half-metallic electronic states of CrO2: Bulk-sensitive spin-resolved photoemission spectroscopy

Hirokazu Fujiwara, Masanori Sungawa, Kensei Terashima, Tomoko Kittaka, Makoto Ogata, Takanori Wakita, Yuji Muraoka, Takayoshi Yokoya

Annual Meetings of Chugoku-Shikoku chapter of JSAP 2016

 

Surface metallicity of half-metal CrO2(001) films

Hirokazu Fujiwara, Masanori Sunagawa, Kensei Terashima, Takamasa Nagayama, Tomoko Kittaka, Makoto Ogata, Shin-ichiro Ideta, Kiyohisa Tanaka, Takanori Wakita, Yuji Muraoka, Takayoshi Yokoya

JPS Spring Meeting 2016

 

Half-metallicity of CrO2 revealed by bulk-sensitive spin-resolved photoemission spectroscopy

Hirokazu FujiwaraMasanori SunagawaKensei TerashimaTomoko KittakaMakoto OgataTakanori WakitaYuji MuraokaTakayoshi Yokoya

JCS West Japan Chemistry Forum 2015

 

Intrinsic electronic states of ferromagnetic metal CrO2 revealed by bulk-sensitive spin-resolved photoemission spectroscopy

Hirokazu FujiwaraMasanori SunagawaKensei TerashimaTomoko KittakaMakoto OgataTakanori WakitaYuji MuraokaTakayoshi Yokoya

JPS Fall Meeting 2015

 

Bulk sensitive spin-resolved photoemission spectroscopy of half-metallic ferromagnet CrO2 II

Hirokazu FujiwaraMasanori SunagawaTomoko KittakaMakoto OgataKensei TerashimaTakanori WakitaYuji MuraokaTakayoshi Yokoya

JPS Spring Meeting 2015

 

Bulk sensitive spin-resolved photoemission spectroscopy of half-metallic ferromagnet CrO2

Hirokazu FujiwaraMasanori SunagawaTomoko KittakaKensei TerashimaTakanori WakitaYuji MuraokaTakayoshi Yokoya

JPS Fall Meeting 2014

 

 

Award

Incentive Award of the 21th JSAP Fall Meeting

Best Master’s Thesis Award (Okayama University)

Dean Award of Graduation School of Natural Science and Technology, Okayama University

 

Other activities

MaMaSELF Summer School (September 2014, Montpellier, France)

 

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