Mossbauer Spectroscopic Study of Neptunium Compounds

2006 Fiscal Year Final Research Report Summary

• Project/Area Number: 17540311
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: HOMMA Yoshiya Tohoku University, Institute for Materials Research, Research Associate, 金属材料研究所, 助手 (00260448)
• Co-Investigator(Kenkyū-buntansha): NAKDA Masami Japan Atomic Energy Association, Nuclear Science and Engineering Directorate, Senior Researcher, 原子力基礎工学研究部門, 副主任研究員 (60370441) ; NASU Saburo Osaka University, Graduate School of Engineering Science, Emeritus Professor, 大学院基礎工学研究科, 名誉教授 (00030057) ; AOKI Dai Institute for Materials Research, Research Associate, 金属材料研究所, 助手 (30359541) ; NAKAMURA Akio Japan Atomic Energy Association, Advance Science Research Center, Principal Investigator, 先端基礎研究センター, 主任研究員 (80370443) ; SHIOKAWA Yoshinobu Institute for Materials Research, Professor, 金属材料研究所, 教授 (50111307)
• Project Period (FY): 2005 – 2006
• Keywords: Mossbauer Spectroscopy / Magnetism / Neptunium / Actinide / Hyperfine Field / Magnetic Structure / 5f electron / Electronic State

Research Abstract

Mossbauer spectroscopy has been performed for the neptunium compounds, which were made by flux method. Especially, We applied the Np-237 Mossbauer spectroscopy, which was used only for the complex compounds in Japan, to elucidate the electronic and magnetic state of NpTGa_5. Fe-57 Mossbauer spectroscopy was adapted to NpFeGa_5, in which Fe sites also has magnetic moment in addition to Np sites. NpFeGa5 becomes antiferromagnet below 117 K and Hyperfine field reaches to 1.9 T at 4.2 K. This result consists with the neutron diffraction experiment by Metoki et al. Hyperfine field at Np sites was determined as 204 T indicating that Np atom has a magnetic moment of 0.94 μ_B.Physical properties such as electrical resistivity, magnetic susceptibility and specific heat have measured for these compounds.

Research Products

• [Journal Article] Electrical and Magnetic Properties of an Ising-type Ferromagnet NpSb_2 (2007)
  • Author(s): Y.Homma, D.Aoki, Y.Haga, H.Sakai, S.Ikeda, E.Yamamoto, A.Nakamura, Y.Shiokawa, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan, 76 (2006), Vol.7 76・07(印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Electrical and Magnetic Prop erties of an Ising-typ e Ferromagnet NpSb_2 (2007)
  • Author(s): Y.Homma, D.Aoki, Y.Haga, H.Sakai, S.Ikeda, E.Yamamoto, A.Nakamura, Y.Shiokawa, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan Vol.7 (in press). Pages: 76
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Np-237 and Fe-57 Mossbauer study of NpFeGa_5 (2006)
  • Author(s): Y.Homma, M.Nakada, A.Nakamura, S.Nasu, D.Aoki, H.Sakai, S.Ikeda, E.Yamamoto, Y.Haga, Y.Onuki, Y.Shiokawa
  • Journal Title: Hyperfine Interactions 168 Pages: 1175-1179
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Hyperfine Interactions of NpFeGa_5 Observed by ^<237>Np and ^<57>Fe Mossbauer Spectroscopy (2006)
  • Author(s): Y.Homma, Saburo Nasu, A.Nakamura, Masami Nakada, D.Aoki, Naoto Metoki, E.Yamamoto, H.Sakai, S.Ikeda, Y.Haga, Y.Onuki, Y.Shiokawa
  • Journal Title: Journal of the Physical Society of Japan 75(Supplement) Pages: 44-46
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Single Crystal Growth and Magnetic Properties of Neptunium Compounds. (2006)
  • Author(s): D.Aoki, Y.Homma, H.Sakai, S.Ikeda, Y.Shiokawa, E.Yamamoto, A.Nakamura, Y.Haga, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan 75(Supplement) Pages: 36-38
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Magnetic properties and heavy electronic states in the antiferromagnet NpPtGa_5. (2006)
  • Author(s): D.Aoki, Y.Haga, Y.Homma, Y.Shiokawa, E.Yamamoto, A.Nakamura, R.Settai, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan 75 Pages: 14715
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Characteristic high-field magnetization in a transuranium antiferromagnet NpRhGa_5. (2006)
  • Author(s): K.Sugiyama, H.Nakashima, D.Aoki, Y.Haga, E.Yamamoto, A.Nakamura, Y.Homma, Y.Shiokawa, K.Kindo, M.Hagiwara, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan, 75 (2006) 75 Pages: 94707
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Neutron scattering study of magnetic structure and metamagnetic transition between low- and high-moment states of NpNiGa_5 (2006)
  • Author(s): F.Honda, N.Metoki, K.Kaneko, S.Jonen, E.Yamamoto, D.Aoki, Y.Homma, Y.Haga, Y.Shiokawa, Y.Onuki
  • Journal Title: Physical Review B 74 Pages: 144413
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Magnetic phase diagram and change in 5f electronic states in NpNiGa_5. (2006)
  • Author(s): F.Honda, N.Metoki, K.Kaneko, S.Jonen, E.Yamamoto, D.Aoki, Y.Homma, Y.Shiokawa, Y.Onuki
  • Journal Title: Physica B : Condensed Matter 378-380 Pages: 1009-1010
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Magnetic structure and successive phase transition in NpRhGa_5. (2006)
  • Author(s): S.Jonen, N.Metoki, F.Honda, K.Kaneko, D.Aoki, Y.Homma, E.Yamamoto, Y.Haga, Y.Shiokawa, Y.Onuki
  • Journal Title: Physica B : Condensed Matter 378-380 Pages: 1018-1020
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Neutron diffraction study of magnetic structure and successive 5f electronic transition in the itinerant antiferromagnet NpRhGa_5. (2006)
  • Author(s): S.Jonen, N.Metoki, F.Honda, K.Kaneko, E.Yamamoto, Y.Haga, D.Aoki, Y.Homma, Y.Shiokawa, Y.Onuki
  • Journal Title: Physical Review 74 Pages: 144412
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] A-Type Antiferromagnetic Ordering and the Transition of the 5f Electronic State Accompanied by Unusual Moment Reorientation in NpRhGa_5. (2006)
  • Author(s): S.Jonen, N.Metoki, F.Honda, K.Kaneko, E.Yamamoto, Y.Haga, D.Aoki, Y.Homma, Y.Shiokawa, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan 75(Supplement) Pages: 41-43
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] A magnetic compton scattering study of NpNiGa_5. (2006)
  • Author(s): S.Tsutsui, Y.Sakurai, M.Itou, D.Aoki, E.Yamamoto, Y.Homma, Y.Haga, A.Nakamura, Y.Shiokawa, Y.Onuki
  • Journal Title: Physica B : Condensed Matter 378-380 Pages: 1011-1012
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Hyperfine Interactions of NpFeGa_5 Observed by ^<237>Np and ^<57>Fe Mossbauer Spectroscopy (2006)
  • Author(s): Y.Homma, Saburo Nasu, A.Nakamura, Masami Nakada, D.Aoki, Naoto Metoki, E..Yamamoto, H.Sakai, S.Ikeda, Y.Haga, Y.Onuki, Y.Shiokawa
  • Journal Title: Journal of the Physical Society of Japan 75 Pages: Supplement 44-46
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Single Crystal Growth and Magnetic Properties of Neptunium Compounds (2006)
  • Author(s): D.Aoki, Y.Homma, H.Sakai, S.Ikeda, Y.Shiokawa, E..Yamamoto, A.Nakamura, Y.Haga, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan 75 Pages: Supplement 36-38
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Characteristic high-field magnetization in a transuranium antiferromagnet NpRhGa_5. (2006)
  • Author(s): K.Sugiyama, H.Nakashima, D.Aoki, Y.Haga, E.Yamamoto, A.Nakamura, Y.Homma, Y.Shiokawa, K.Kindo, M.Hagiwara, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan 75 Pages: 94707
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Neutron scattering study of magnetic structure and metamagnetic transition between low- and high-moment states of NpNiGa_5-art. no. 144413', Physical Review B, 7414 (2006), p. 4413. (2006)
  • Author(s): F.Honda, N.Metoki, K.Kaneko, S.Jonen, E.Yamamoto, D.Aoki, Y.Homma, Y.Haga, Y.Shiokawa, Y.Onuki
  • Journal Title: Physical Review B 74 Pages: 144413
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Magnetic phase diagram and change in 5f electronic states in NpNiGa_5 (2006)
  • Author(s): F.Honda, N.Metoki, K.Kaneko, S.Jonen, E.Yamamoto, D.Aoki, Y.Homma, Y.Shiokawa, Y Onuki
  • Journal Title: Physica B : Condensed Matter 378-380 Pages: 1009-1010
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Magnetic structure and successive phase transition in NpRhGa_5 (2006)
  • Author(s): S.Jonen, N.Metoki, F.Honda, K.Kaneko, D.Aoki, Y.Homma, E.Yamamoto, Y.Haga, Y.Shiokawa, Y.Onuki
  • Journal Title: Physica B : Condensed Matter 378-380 Pages: 1018-1020
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Neutron diffraction study of magnetic structure and successive 5f electronic transition in the itinerant antiferromagnet NpRhGa_5. (2006)
  • Author(s): S.Jonen, N.Metoki, F.Honda, K.Kaneko, E.Yamamoto, Y.Haga, D.Aoki, Y.Homma, Y.Shiokawa, Y.Onuki
  • Journal Title: Physical Review B 74 Pages: 144412
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] A-Type Antiferromagnetic Ordering and the Transition of the 5f Electronic State Accompanied by Unusual Moment Reorientation in NpRhGa_5 (2006)
  • Author(s): S.Jonen, N.Metoki, F.Honda, K.Kaneko, E..Yamamoto, Y.Haga, D.Aoki, Y.Homma, Y.Shiokawa, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan 75 Pages: Supplement 41-43
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] A magnetic compton scattering study of NpNiGa_5 (2006)
  • Author(s): S.Tsutsui, Y.Sakurai, M.Itou, D.Aoki, E.Yamamoto, Y.Homma, Y.Haga, A.Nakamura, Y.Shiokawa, Y.Onuki
  • Journal Title: Physica B : Condensed Matter 378-380 Pages: 1011-1012
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Magnetically induced quadrupole splitting and hyperfine field in NpFeGa_5. (2005)
  • Author(s): Y.Homma, S.Nasu, D.Aoki, K.Kaneko, N.Metoki, E.Yamamoto, A.Nakamura, S.Morimoto, H.Yasuoka, Y.Onuki, Y.Shiokawa
  • Journal Title: Physica B : Condensed Matter 359 Pages: 1105-1107
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Magnetic and electrical properties of NpTGa_5 (T = Fe, Rh and Ni). (2005)
  • Author(s): D.Aoki, Y.Homma, Y.Shiokawa, H.Sakai, E.Yamamoto, A.Nakamura, Y.Haga, R.Settai, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan 74 Pages: 2323-2331
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Quasi-two-dimensional Fermi surfaces in the flat antiferromagnetic Brillouin zone of NpRhGa_5. (2005)
  • Author(s): D.Aoki, H.Yamagami, Y.Homma, Y.Shiokawa, E.Yamamoto, A.Nakamura, Y.Haga, R.Settai, Y.Onuki
  • Journal Title: Journal of Physics-Condensed Matter 17 Pages: L169-L175
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] de Haas-van Alphen effect in NpCoGa_5. (2005)
  • Author(s): D.Aoki, Y.Homma, Y.Shiokawa, E.Yamamoto, A.Nakamura, Y.Haga, R.Settai, Y.Onuki
  • Journal Title: Physica B : Condensed Matter 359 Pages: 1084-1086
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] NMR study of NpFeGa_5. (2005)
  • Author(s): S.Kambe, Y.Homma, Y.Tokunaga, H.Sakai, D.Aoki, E.Yamamoto, A.Nakamura, Y.Shiokawa, R.E.Walstedt
  • Journal Title: Physica B : Condensed Matter 359 Pages: 1072-1074
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Magnetic structure and metamagnetism in single crystals of NpCoGa_5. (2005)
  • Author(s): N.Metoki, K.Kaneko, E.Colineau, P.Javorsky, D.Aoki, Y.Homma, P.Boulet, F.Wastin, Y.Shiokawa, N.Bernhoeft, E.Yamamoto, Y.Onuki, J.Rebizant, G.H.Lander
  • Journal Title: Physical Review B 72 Pages: 014460
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Electrical and magnetic properties in NpTGa_5 (T = Fe, Co, Ni). (2005)
  • Author(s): E.Yamamoto, D.Aoki, Y.Homma, Y.Shiokawa, Y.Haga, A.Nakamura, Y.Onuki
  • Journal Title: Physica B : Condensed Matter 359 Pages: 1099-1101
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Magnetic structure of NpTGa_5 (T : Fe, Co, Ni) (2005)
  • Author(s): F.Honda, N.Metoki, K.Kaneko, D.Aoki, Y.Homma, E.Yamamoto, Y.Shiokawa, Y.Onuki, E.Colineau, N.Bernhoeft, G.H.Lander
  • Journal Title: Physica B : Condensed Matter 359 Pages: 1147-1149
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Magnetically induced quadrupole splitting and hyperfine field in NpFeGa_5 (2005)
  • Author(s): Y.Homma, S.Nasu, D.Aoki, K.Kaneko, N.Metoki, E.Yamamoto, A.Nakamura, S.Morimoto, H.Yasuoka, Y.Onuki, Y.Shiokawa
  • Journal Title: Physica B : Condensed Matter 359 Pages: 1105-1107
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Magnetic and electrical properties of NpTGa_5 (T = Fe, Rh and Ni) (2005)
  • Author(s): D.Aoki, Y.Homma, Y.Shiokawa, H.Sakai, E.Yamamoto, A.Nakamura, Y.Haga, R.Settai, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan 74 Pages: 2323-2331
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Quasi-two-dimensional Fermi surfaces in the flat antiferromagnetic Brillouin zone of NpRhGa_5 studied by dHvA experiments and energy band calculations (2005)
  • Author(s): D.Aoki, H.Yamagami, Y.Homma, Y.Shiokawa, E.Yamamoto, A.Nakamura, Y.Haga, R.Settai, Y.Onuki
  • Journal Title: Journal of Physics-Condensed Matter 17 Pages: L169-L175
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] de Haas-van Alphen effect in NpCoGa_5 (2005)
  • Author(s): D.Aoki, Y.Homma, Y.Shiokawa, E.Yamamoto, A.Nakamura, Y.Haga, R.Settai, Y.Onuki
  • Journal Title: Physica B : Condensed Matter 359 Pages: 1084-1086
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] NMR study of NpFeGa_5 (2005)
  • Author(s): S.Kambe, Y.Homma, Y.Tokunaga, H.Sakai, D.Aoki, E.Yamamoto, A.Nakamura, Y.Shiokawa, R.E.Walstedt
  • Journal Title: Physica B : Condensed Matter 359 Pages: 1072-1074
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Magnetic structure and metamagnetism in single crystals of NpCoGa_5-art. no. 014460 (2005)
  • Author(s): N.Metoki, K.Kaneko, E.Colineau, P.Javorsky, D.Aoki, Y.Homma, P.Boulet, F.Wastin, Y.Shiokawa, N.Bernhoeft, E.Yamamoto, Y.Onuki, J.Rebizant, G H.Lander
  • Journal Title: Physical Review B 72 Pages: 014460
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Electrical and magnetic properties in NpTGa_5 (T = Fe, Co, Ni) (2005)
  • Author(s): E.Yamamoto, D.Aoki, Y.Homma, Y.Shiokawa, Y.Haga, A.Nakamura, Y.Onuki
  • Journal Title: Physica B : Condensed Matter 359 Pages: 1099-1101
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Lander, 'Magnetic structure of NpTGa_5 (T : Fe, Co, Ni) (2005)
  • Author(s): F.Honda, N.Metoki, K.Kaneko, D.Aoki, Y.Homma, E.Yamamoto, Y.Shiokawa, Y.Onuki, E.Colineau, N.Bernhoeft, G H.
  • Journal Title: Physica B : Condensed Matter 359 Pages: 1147-1149
  • Description: 「研究成果報告書概要(欧文)」より