JAEA
  • help
  • PC | SP
  • JP | EN
          
検索対象：     
報告書番号：
※ 半角英数字
 年 ～ 
 年
全てクリア
検索結果：　17 件中 1件目～17件目を表示
  • 1

発表形式

Initialising ...

選択項目を絞り込む

掲載資料名

Initialising ...

発表会議名

Initialising ...

筆頭著者名

Initialising ...

キーワード

Initialising ...

使用言語

Initialising ...

発行年

Initialising ...

開催年

Initialising ...

選択した検索結果をダウンロード

論文

A Chemiluminescence sensor with signal amplification based on a self-immolative reaction for the detection of fluoride ion at low concentrations

久松 秀悟; 鈴木 伸一; 幸本 重男*; 岸川 圭希*; 山本 雄介*; 元川 竜平; 矢板 毅

Tetrahedron, 73(27-28), p.3993 - 3998, 2017/07

https://doi.org/10.1016/j.tet.2017.05.084
 被引用回数：15 パーセンタイル：57.79(Chemistry, Organic)

A sensory system incorporated with an amplification function was developed for detection of trace-level fluoride ions. This sensory system comprises two steps, namely, amplification, and chemiluminescence. These steps were linked with chemical reactions and were induced continuously. The process from amplification to chemiluminescence was accomplished in the system by using fluoride ions. The amplification was based on a self-immolative system, which permitted the detection of emissions even at low fluoride ion concentration for system in which chemiluminescence cannot be induced in the absence of fluoride ions. An optical ratio of the chemiluminescent compound and the amplifier was calculated for achieving efficient amplification.

論文

Crossover phase diagram and electronic state in the heavy-fermion metamagnets UIr$$_2$$Zn$$_{20}$$ and UCo$$_2$$Zn$$_{20}$$

広瀬 雄介*; 竹内 徹也*; 本多 史憲*; 吉内 伸吾*; 萩原 政幸*; 山本 悦嗣; 芳賀 芳範; 摂待 力生*; 大貫 惇睦

Journal of the Physical Society of Japan, 84(7), p.074704_1 - 074704_10, 2015/07

https://doi.org/10.7566/JPSJ.84.074704
 被引用回数：6 パーセンタイル：45.25(Physics, Multidisciplinary)

Magnetic phase diagram of two heavy fermion metamagnets UIr$$_2$$Zn$$_{20}$$ and UCo$$_2$$Zn$$_{20}$$ is investigated. UIr$$_2$$Zn$$_{20}$$ shows a reconstruction of the electronic states across the metamagnetic crossover. However, UCo$$_2$$Zn$$_{20}$$ shows a rather continuous evolution. The remarkable difference in both compounds can be accounted for by different degree of hybridization between 5$$f$$ and ligand electrons.

論文

Unique Fermi surface and emergence of charge density wave in EuGa$$_4$$ and EuAl$$_4$$

仲村 愛*; 平仲 裕一*; 辺土 正人*; 仲間 隆男*; 三浦 泰直*; 堤 泰樹*; 森 晶宣*; 石田 一裕*; 三田村 勝哉*; 広瀬 雄介*; et al.

JPS Conference Proceedings (Internet), 3, p.011012_1 - 011012_6, 2014/06

https://doi.org/10.7566/JPSCP.3.011012

Two europium compounds with the same structure EuGa$$_4$$ and EuAl$$_4$$ have been investigated. The Fermi surfaces revealed experimentally show a peculiar feature: flat Fermi surface sheets appear parallel to the tetragonal [110] planes. Reflecting this, a charge density wave transition due to the nesting of Fermi surface sheets has been observed in EuAl$$_4$$.

論文

Transport properties of UT$$_2$$Zn$$_{20}$$ (T: Co, Ir)

広瀬 雄介*; 竹内 徹也*; 吉内 伸吾*; 山本 悦嗣; 芳賀 芳範; 摂待 力生*; 大貫 惇睦

JPS Conference Proceedings (Internet), 3, p.011056_1 - 011056_6, 2014/06

https://doi.org/10.7566/JPSCP.3.011056

Transport properties of UT$$_2$$Zn$$_{20}$$ (T: Co, Ir) have been investigated by measuring Hall effect. Overall behavior is explained by the skew scattering on the impurity model at high temperatures and the periodic Anderson model at low temperatures. Rather complicated behavior was observed in UIr$$_2$$Zn$$_{20}$$ with ferromagnetic instability, implying the electronic modification under magnetic field.

論文

Magnetic and Fermi surface properties of EuGa$$_4$$

仲村 愛*; 平仲 裕一*; 辺土 正人*; 仲間 隆男*; 三浦 泰直*; 堤 泰樹*; 森 晶宣*; 石田 一裕*; 三田村 勝哉*; 広瀬 雄介*; et al.

Journal of the Physical Society of Japan, 82(10), p.104703_1 - 104703_10, 2013/10

https://doi.org/10.7566/JPSJ.82.104703
 被引用回数：35 パーセンタイル：81.11(Physics, Multidisciplinary)

High quality single crystals of EuGa$$_4$$ have been grown from Ga flux. Electrical resistivity, magnetic susceptibility, high-field magnetization, specific heat, thermoelectric power and de Haas-van Alphen effect were investigated. Antiferromagnetic transition due to divalent Eu atoms were observed at 16.5 K. A charge density wave transition was also found under high pressure accompanied by a Fermi surface reconstruction. These observations were fully accounted for by the Fermi surface topology and corresponding band calculations.

論文

Single crystal growth and various electronic states in Yb-based compounds

広瀬 雄介*; 吉内 伸吾*; 西村 尚人*; 阪口 準也*; 榎 健太郎*; 岩川 健*; 三浦 泰直*; 杉山 清寛*; 大貫 惇睦; 摂待 力生*; et al.

Journal of the Korean Physical Society, 62(12), p.1858 - 1861, 2013/06

https://doi.org/10.3938/jkps.62.1858
 被引用回数：0 パーセンタイル：0(Physics, Multidisciplinary)

We succeeded in growing single crystals of YbTIn$$_5$$ (T: Co, Rh, Ir), YbGa$$_4$$, YbT$$_2$$Zn$$_{20}$$ (T: Co, Rh, Ir), etc. The electronic and magnetic properties are clarified by measuring the electrical resistivity, magnetic susceptibility, magnetization, specific heat and de Haas-van Alphen effect.

論文

Electronic states in antiferromagnet UCd$$_{11}$$ and reference compound ThCd$$_{11}$$; Studied by the de Haas-van Alphen effect

広瀬 雄介*; 三浦 泰直*; 堤 泰樹*; 吉内 伸吾*; 大家 政洋*; 杉山 清寛*; 竹内 徹也*; 山上 浩志*; 山本 悦嗣; 芳賀 芳範; et al.

Physica Status Solidi (B), 250(3), p.642 - 645, 2013/03

https://doi.org/10.1002/pssb.201200765
 被引用回数：4 パーセンタイル：20.56(Physics, Condensed Matter)

Electronic states of an antiferromagnet UCd$$_{11}$$ and its reference compound ThCd$$_{11}$$ were investigated by means of de Haas-van Alphen (dHvA) effect. From the cyclotron effective mass determined from the dHvA oscillation, the electronic specific heat of UCd$$_{11}$$ was estimated as 100 mJ/K$$^2$$mol, much smaller than 840 in the previous report. The result suggests that magnetic excitation contributes significantly to the specific heat.

論文

Fermi surface and superconducting properties of non-centrosymmetric LaNiC$$_2$$

広瀬 雄介*; 岸野 利彦*; 阪口 準也*; 三浦 泰直*; 本多 史憲*; 竹内 徹也*; 山本 悦嗣; 芳賀 芳範; 播磨 尚朝*; 摂待 力生*; et al.

Journal of the Physical Society of Japan, 81(11), p.113703_1 - 113703_4, 2012/11

https://doi.org/10.1143/JPSJ.81.113703
 被引用回数：24 パーセンタイル：74.35(Physics, Multidisciplinary)

Fermi surface and superconducting properties were investigated on an non-centrosymmetric LaNiC$$_2$$ compound. Reflecting the crystal structure characteristics, the Fermi surfaces are split due to the antisymmetric spin-orbit interaction. On the other hand, thermodynamic property in the superconducting state follow the conventional BCS theory despite the splitting of Fermi surfaces.

論文

Electrical and magnetic properties of quasicrystal approximants RCd$$_6$$ (R: rare earth)

森 晶宣*; 太田 尚志*; 吉内 伸吾*; 岩川 健*; 田賀 悠記*; 広瀬 雄介*; 竹内 徹也*; 山本 悦嗣; 芳賀 芳範; 本多 史憲*; et al.

Journal of the Physical Society of Japan, 81(2), p.024720_1 - 024720_10, 2012/02

https://doi.org/10.1143/JPSJ.81.024720
 被引用回数：42 パーセンタイル：83.32(Physics, Multidisciplinary)

Single crystals of quasicrystal approximants RCd$$_6$$ (R: rare earths) were prepared using the self-flux method and subsequent annealing. A structural transition was confirmed in some of these crystals. Antiferromagnetic ordering was observed for R = Nd, Sm, Tb and Dy. It was found that the structural order-disorder transition has a great influence on the magnetic ordering and transport properties.

論文

Characteristic heavy fermion properties in YbCu$$_2$$Si$$_2$$ and YbT$$_2$$Zn$$_{20}$$ (T: Co, Rh, Ir)

大貫 惇睦; 安井 慎一*; 松下 昌輝*; 吉内 伸吾*; 大家 政洋*; 広瀬 雄介*; Dung, N. D.*; 本多 史憲*; 竹内 徹也*; 摂待 力生*; et al.

Journal of the Physical Society of Japan, 80(Suppl.A), p.SA003_1 - SA003_6, 2011/12

https://doi.org/10.1143/JPSJS.80SA.SA003

We studied the Fermi surface properties of YbCu$$_2$$Si$$_2$$ and YbCu$$_2$$Ge$$_2$$ with the tetragonal structure by measuring the de Haas-van Alphen (dHvA) oscillations, together with the energy band calculations. It was clarified that 4f electrons contribute to the Fermi surface of a valence fluctuating compound YbCu$$_2$$Si$$_2$$, but not to that of a divalent compound YbCu$$_2$$Ge$$_2$$. We also studied the heavy fermion properties of YbT$$_2$$Zn$$_{20}$$ (T: Co, Rh, Ir) with the cubic caged structure. The metamagnetic behavior or an abrupt nonlinear increase of magnetization was observed. By measuring the electrical resistivity under pressure and magnetic field, we clarified that the electronic state close to the quantum critical point is realized in YbIr$$_2$$Zn$$_{20}$$ at 5.2 GPa and also YbCo$$_2$$Zn$$_{20}$$ at ambient pressure.

論文

Magnetic-field-induced metallic state in $$beta$$-US$$_2$$

杉山 清寛*; 広瀬 雄介*; 榎 健太郎*; 池田 修悟*; 山本 悦嗣; 立岩 尚之; 芳賀 芳範; 木田 孝則*; 萩原 政幸*; 金道 浩一*; et al.

Journal of the Physical Society of Japan, 80(Suppl.A), p.SA104_1 - SA104_3, 2011/07

https://doi.org/10.1143/JPSJS.80SA.SA104
 被引用回数：3 パーセンタイル：27.54(Physics, Multidisciplinary)

Magnetic and transport properties under high magnetic field were studied on a magnetic semiconductor $$beta$$-US$$_2$$. Large magnetization reaching 1.75 $$mu_{rm B}$$ has been observed at 50 T. At the same time, resistivity decreases drastically from insulating behavior at 0 T to almost metallic characteristics at 50 T. The results are discussed based on the magnetic polaron mechanism.

論文

Relation between metamagnetic transition and quantum critical point in heavy fermion compound YbIr$$_2$$Zn$$_{20}$$

大貫 惇睦; 安井 慎一*; 吉内 伸吾*; 大家 政洋*; 松下 昌輝*; 広瀬 雄介*; 竹内 徹也*; 本多 史憲*; 摂待 力生*; 杉山 清寛*; et al.

Journal of Physics; Conference Series, 273, p.012013_1 - 012013_4, 2011/02

https://doi.org/10.1088/1742-6596/273/1/012013
 被引用回数：1 パーセンタイル：33.9(Physics, Condensed Matter)

Metamagnetic behavior of the heavy fermion compound YbIr$$_2$$Zn$$_{20}$$ has been studied experimentally. The metamagnetic transition was clearly seen in the bulk magnetization curve. Near the metamagnetic critical field H$$_m$$ $$sim$$ 100 kOe, the effective mass of conduction electrons exhibits a significant enhancements. It is suggested that the present metamagnetism is related to the magnetic instability around the quantum critical point.

論文

Magnetic and superconducting properties of CeRhGe$$_2$$ and CePtSi$$_2$$

広瀬 雄介*; 西村 尚人*; 本多 史憲*; 杉山 清寛*; 萩原 政幸*; 金道 浩一*; 竹内 徹也*; 山本 悦嗣; 芳賀 芳範; 松浦 直人*; et al.

Journal of the Physical Society of Japan, 80(2), p.024711_1 - 024711_12, 2011/02

https://doi.org/10.1143/JPSJ.80.024711
 被引用回数：7 パーセンタイル：47.32(Physics, Multidisciplinary)

Magnetic and superconducting properties of CeRhGe$$_2$$ and CePtSI$$_2$$ have been investigated by bulk property measurements and neutron scattering experiments. CeRhGe$$_2$$ was found to order antiferromagnetically with an ordered moment 1.3 $$mu_{rm B}$$/Ce along the $$c$$-axis of the orthorhombic unit cell. High pressure resistivity measurements revealed a suppression of the antiferromagnetic transition with increasing pressure and the occurrence of superconductivity near the critical pressure where antiferromagnetism vanishes. Quantum-critical characteristics are expected to these compounds.

論文

Metamagnetic behavior in heavy-fermion compound YbIr$$_2$$Zn$$_{20}$$

竹内 徹也*; 安井 慎一*; 戸田 雅敏*; 松下 昌輝*; 吉内 伸吾*; 大家 政洋*; 片山 敬亮*; 広瀬 雄介*; 吉谷 尚久*; 本多 史憲*; et al.

Journal of the Physical Society of Japan, 79(6), p.064609_1 - 064609_15, 2010/06

https://doi.org/10.1143/JPSJ.79.064609
 被引用回数：42 パーセンタイル：83.7(Physics, Multidisciplinary)

Metamagnetic behavior of the heavy-fermion compound YbIr$$_2$$Zn$$_{20}$$ was studied by magnetization, de Haas-van Alphen effect, magnetoresistance, specific heat, thermal expansion and magnetostriction. Metamagnetic behavior was observed for all the physical properties at low temperatures. It is remarkable that the Fermi surfaces observed in the dHvA effect unchanges across the metamagnetic transition.

論文

Heavy fermion state in YbIr$$_2$$Zn$$_{20}$$

吉内 伸吾*; 戸田 雅敏*; 松下 昌輝*; 安井 慎一*; 広瀬 雄介*; 大家 政洋*; 片山 敬亮*; 本多 史憲*; 杉山 清寛*; 萩原 政幸*; et al.

Journal of the Physical Society of Japan, 78(12), p.123711_1 - 123711_4, 2009/12

https://doi.org/10.1143/JPSJ.78.123711
 被引用回数：39 パーセンタイル：82.77(Physics, Multidisciplinary)

High-field magnetization and de Haas-van Alphen effect were measured on a heavy fermion compound YbIr$$_2$$Zn$$_{20}$$. Large cyclotron masses ranging from 4 to 27 $$m_0$$ were detected in the dHvA experiment, and are found to be reduced at magnetic fields higher than 120 kOe. From the present experimental results together with the 4f-itinerant band calculations, the 4f electrons are considered to form heavy fermion state.

口頭

反強磁性体UCd$$_{11}$$の磁性

山本 悦嗣; 広瀬 雄介*; 榎 健太郎*; 三田村 勝哉*; 杉山 清寛*; 竹内 徹也*; 萩原 政幸*; 金道 浩一*; 芳賀 芳範; 摂待 力生*; et al.

no journal, , 

UCd$$_{11}$$は格子定数a=9.29${AA}$のBaHg$$_{11}$$型立方晶をとり、その最近接U-U間距離は6.56${AA}$と大きい。また、UCd$$_{11}$$は$$T_{N}$$=5Kとこの系の化合物では転移温度が高く、また常磁性領域における電子比熱係数は840mJ/K$$^2cdot$$molと大きい。これまでに単結晶による物性測定が行われ、$$H$$//$$langle$$100$$rangle$$方向の磁気相図が得られている。今回新たに、UCd$$_{11}$$の$$H$$//$$langle$$100$$rangle$$, $$langle$$110$$rangle$$, $$langle$$111$$rangle$$の1.3Kにおける強磁場磁化曲線を測定し、転移磁場及び磁場誘起強磁性相における磁気異方性を見いだした。

口頭

超高真空表面プロセス研究に向けたガス精密制御の自動化

阿路川 雄介*; 山本 幸男*; 吉田 光; 吉越 章隆

no journal, , 

超高真空の表面反応実験では微量制御が不可欠であり、通常手動によるバリアブルリークバルブによって行われてきた。マルチ計測・制御には手動制御には限界がある。他方、自動制御には実験者への負担軽減や再現性の向上など導入メリットは極めて大きい。本報告では、バリアブルリークバルブの開閉に自動制御を開発し、10$$^{-8}$$Paから10$${^-4}$$Paまでの任意の圧力制御を実現したので報告する。

17 件中 1件目～17件目を表示
  • 1