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Start Over Author "Tanaka, Arata" Journal physical review b
13 results on '"Tanaka, Arata"'

2. Stability of the Pb divalent state in insulating and metallic PbCrO3

Author

Zhao, Jianfa, primary, Haw, Shu-Chih, additional, Wang, Xiao, additional, Cao, Lipeng, additional, Lin, Hong-Ji, additional, Chen, Chien-Te, additional, Sahle, Christoph J., additional, Tanaka, Arata, additional, Chen, Jin-Ming, additional, Jin, Changqing, additional, Hu, Zhiwei, additional, and Tjeng, Liu Hao, additional

Published
2023
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4. Electronic states and possible origin of the orbital-glass state in a nearly metallic spinel cobalt vanadate: An x-ray magnetic circular dichroism study

Author

Nonaka, Yosuke, primary, Shibata, Goro, additional, Koborinai, Rui, additional, Ishigami, Keisuke, additional, Sakamoto, Shoya, additional, Ikeda, Keisuke, additional, Chi, Zhendong, additional, Koide, Tsuneharu, additional, Tanaka, Arata, additional, Katsufuji, Takuro, additional, and Fujimori, Atsushi, additional

Published
2018
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6. Revising the 4f symmetry in CeCu2Ge2; Soft X-ray absorption and hard X-ray photoemission spectroscopy

Author

Aratani, Hidekazu, Nakatani, Yasuhiro, Fujiwara, Hidenori, Kawada, Moeki, Kanai, Yuina, Yamagami, Kohei, Fujioka, Shuhei, Hamamoto, Satoru, Kuga, Kentaro, Kiss, Takayuki, Yamasaki, Atsushi, Higashiya, Atsushi, Kadono, Toshiharu, Imada, Shin, Tanaka, Arata, Tamasaku, Kenji, Yabashi, Makina, Ishikawa, Tetsuya, Yasui, Akira, Saito, Yuji, Narumi, Yasuo, Kindo, Koichi, Ebihara, Takao, and Sekiyama, Akira

Subjects
Condensed Matter::Superconductivity
Abstract

We present a detailed study on the $4f$ ground state symmetry of the pressure-induced superconductor CeCu$_2$Ge$_2$ probed by soft X-ray absorption and hard X-ray photoemission spectroscopy. The revised Ce $4f$ ground states are determined as $|{\Gamma_7}\rangle=\sqrt{0.45}|{J_{z}=\pm \frac{5}{2}}\rangle - \sqrt{0.55}|{\mp \frac{3}{2}}\rangle$ with $\Sigma\mathchar`-{\rm type}$ in-plane rotational symmetry. This gives an in-plane magnetic moment consistent with the antiferromagnetic moment as reported in neutron measurements. Since the in-plane symmetry is the same as that for the superconductor CeCu$_2$Si$_2$, we propose that the charge distribution along the $c$-axis plays an essential role in driving the system into a superconducting phase.

Published
2018

7. Electronic structure and magnetic properties of magnetically dead layers in epitaxial CoFe2O4/Al2O3/Si(111) films studied by x-ray magnetic circular dichroism

Author

Wakabayashi, Yuki K., primary, Nonaka, Yosuke, additional, Takeda, Yukiharu, additional, Sakamoto, Shoya, additional, Ikeda, Keisuke, additional, Chi, Zhendong, additional, Shibata, Goro, additional, Tanaka, Arata, additional, Saitoh, Yuji, additional, Yamagami, Hiroshi, additional, Tanaka, Masaaki, additional, Fujimori, Atsushi, additional, and Nakane, Ryosho, additional

Published
2017
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8. Direct observation of twin domains of NiO(100) by x-ray linear dichroism at the OKedge using photoemission electron microscopy

Author

Arai, Kuniaki, primary, Okuda, Taichi, additional, Tanaka, Arata, additional, Kotsugi, Masato, additional, Fukumoto, Keiki, additional, Ohkochi, Takuo, additional, Guo, Fangzhun, additional, Nakamura, Tetsuya, additional, Matsushita, Tomohiro, additional, Muro, Takayuki, additional, Oura, Masaki, additional, Senba, Yasunori, additional, Ohashi, Haruhiko, additional, Kakizaki, Akito, additional, and Kinoshita, Toyohiko, additional

Published
2012
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9. Three-dimensional spin orientation in antiferromagnetic domain walls of NiO studied by x-ray magnetic linear dichroism photoemission electron microscopy

Author

Arai, Kuniaki, primary, Okuda, Taichi, additional, Tanaka, Arata, additional, Kotsugi, Masato, additional, Fukumoto, Keiki, additional, Ohkochi, Takuo, additional, Nakamura, Tetsuya, additional, Matsushita, Tomohiro, additional, Muro, Takayuki, additional, Oura, Masaki, additional, Senba, Yasunori, additional, Ohashi, Haruhiko, additional, Kakizaki, Akito, additional, Mitsumata, Chiharu, additional, and Kinoshita, Toyohiko, additional

Published
2012
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11. Valence, spin, and orbital state of Co ions in one-dimensional Ca3Co2O6 : An x-ray absorption and magnetic circular dichroism study

Author

Burnus, Tobias, Hu, Zhiwei, Haverkort, Maurits W., Cezar, Júlio C., Flahaut, Delphine, Hardy, Vincent, Maignan, Antoine, Brookes, Nicholas B., Tanaka, Arata, Hsieh, Hui-Huang, Lin, Hong-Ji, Chen Chien-Te, and Tjeng, L. Hao

Subjects
Condensed Matter::Materials Science, Condensed Matter::Strongly Correlated Electrons
Abstract

We have investigated the valence, spin, and orbital state of the Co ions in the one-dimensional cobaltate Ca3 Co2 O6 using x-ray absorption and x-ray magnetic circular dichroism at the Co- L2,3 edges. The Co ions at both the octahedral Cooct and trigonal Cotrig sites are found to be in a 3+ state. From the analysis of the dichroism we established a low-spin state for the Cooct and a high-spin state with an anomalously large orbital moment of 1.7 μB at the Cotrig 3+ ions. This large orbital moment along the c -axis chain and the unusually large magnetocrystalline anisotropy can be traced back to the double occupancy of the d2 orbital in trigonal crystal field.

Published
2006

12. 窒化物希薄磁性半導体Ga1-xMnxNの高エネルギー分光

Author

Hwang, J. I., Ishida, Yukiaki, Kobayashi, Masaki, Hirata, Gen, Takubo, Ko, Mizokawa, Takashi, Fujimori, Atsushi, Okamoto, Jun, Mamiya, Kazutoshi, Saito, Yuji, Muramatsu, Koji, Ott, H., Tanaka, Arata, Kondo, Tsuyoshi, and Munekata, Hiroo

Abstract

常磁性Ga$_{1-x}$Mn$_{x}$Nの電子構造について光電子分光(PES),X線吸収分光(XAS)によって調べた。XAS実験スペクトルを理論計算と比較することによって、GaN中Mnは正四面体配位結晶場中の2価で説明できることがわかった。この結果に従い、Mn2p及びMn3d光電子スペクトルを配置間相互作用クラスターモデルで解析した。これにより見積もられた電子構造パラメータから計算したp-d交換相互作用定数の大きさはGa$_{1-x}$Mn$_{x}$Asの1.6倍であることが判明した。また、内殻PESからはMn濃度の上昇に伴ってフェルミレベルが降下する様子とバンドギャップ中に新たな状態が生成され増大する様子が観測された。以上のことから、Ga$_{1-x}$Mn$_{x}$Nにおいて十分な正孔濃度を実現することで高い転移点を持つ強磁性が発現する可能性が実験的に示された。

Published
2005

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