Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
郷地 順*; 住山 昭彦*; 山口 明*; 本山 岳*; 木村 憲彰*; 山本 悦嗣; 芳賀 芳範; 大貫 惇睦
Physical Review B, 93(17), p.174514_1 - 174514_5, 2016/05
被引用回数：1 パーセンタイル：5.08(Materials Science, Multidisciplinary)The Josephson effect between a single crystal UPt and a conventional superconductor Al has been investigated under pressure. A possible change of the superconducting order parameter has been detected at a critical 
where the symmetry-breaking antiferromagnetic order disappears. The conclusion is also supported by the different behaviors observed in Josephson current and penetration depth.
西 剛史; 高野 公秀; 伊藤 昭憲; 赤堀 光雄; 湊 和生; 木崎 實
JAERI-Tech 2005-051, 13 Pages, 2005/09
JAERI-Tech-2005-051.pdf:1.38MB
マイナーアクチノイド(MA)化合物の熱拡散率を測定するための装置を整備した。不活性雰囲気のグローブボックス内に、レーザフラッシュ法熱拡散率測定装置を設置することにより、
崩壊核種のMA化合物の熱拡散率測定を可能にした。また、試料の形状に最適化した試料ホルダーを用いることにより、40mg程度の微小試料の測定を可能にした。さらに、この装置の性能を確認するため、タンタル,ニッケル及びセリウム酸化物の測定を行った。その結果、本装置で得た熱拡散率の値は、文献値及び汎用の熱拡散率測定装置により測定した値とほぼ一致し、微小なMA化合物の熱拡散率測定に本装置が有用であることを確認した。
TX
compounds芳賀 芳範
no journal, ,
Actinides and rare-earths compounds TX (
= transition metals, 
= Ga, In) with the tetragonal HoCoGa-type structure (so-called 115 compounds) are one of the most extensively studied systems in correlated electron system because of the emergence of intriguing physical properties including heavy fermion superconductivity and various magnetic orderings. In these compounds, 5f electrons are responsible for both magnetic and transport characteristics. In particular, we discuss the emergence of a magnetic ordering in iso-electronic compounds URhGa and URhIn.
芳賀 芳範; 青木 大*
no journal, ,
Recent advances in single crystal growth and physical property investigations of actinide intermetallic compounds are reviewed. The naturally available uranium and its compounds are well investigated and new phenomena such as unidentified electronic orderings and unconventional superconductivity are being discovered. In transuranics, despite their difficulty in handling, peculiar superconductors and new intermetallic phases have been found in recent years. We discuss technical developments as well as novel behavior of those system.
-type structure芳賀 芳範
no journal, ,
Physical properties of actinides compounds are mainly dominated by the 5f electrons behavior. Among a series of actinides compounds, so-called 115 compounds crystallizing in the tetragonal HoCoGa
-type structure have extensively been studied because of unusual correlated electronic states, including heavy effective mass of conduction electrons, magnetic orderings and heavy fermion superconductivity. We discuss the origin of peculiar behavior arising from uranium 5f electrons.
Ge
; de Haas-van Alphen study芳賀 芳範; 山本 悦嗣; 仲村 愛*; 本多 史憲*; 青木 大*; 松本 裕司*; 山村 朝雄*; 白崎 謙次*; 山上 浩志*
no journal, ,
Electronic structure of the actinide compound ThRhGe is investigated using de Haas-van Alphen effect. The peculiar electronic structure possibly arising from the non-centrosymmetric hexagonal crystal structure is discussed.
Geのフェルミ面芳賀 芳範; 山本 悦嗣; 仲村 愛*; 本多 史憲*; 青木 大*; 松本 裕司*; 山村 朝雄*; 白崎 謙次*; 山上 浩志*; 角田 一樹
no journal, ,
強磁性臨界性が注目されるCeRhGeに対応するTh化合物として、ThRhGeを探索、発見した。バンド計算およびドハース・ファンアルフェン効果によりフェルミ面を実験的に明らかにし、CeRhGeとの比較を行った。
