JOPSS:検索結果一覧

検索結果：　297 件中 1件目～20件目を表示

1
2
3
4
5
・・・
15
>

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 ...

発表言語

Initialising ...

発行年

Initialising ...

開催年

Initialising ...

論文

Composition dependence of the anomalous Nernst effect in Fe $_{4-x}$ Mn $_{x}$ N and Fe $_{4-y}$ Co $_{y}$ N films

Yin, W.*; 伊藤啓太*; 坪和優佑*; 辻川雅人*; 白井正文*; 梅津理恵*; 高梨弘毅

Journal of Magnetism and Magnetic Materials, 628, p.173157_1 - 173157_8, 2025/09

https://doi.org/10.1016/j.jmmm.2025.173157

被引用回数：0 パーセンタイル：0.00(Materials Science, Multidisciplinary)

Fe $_{4}$ N exhibits a large anomalous Nernst effect (ANE), which motivates a systematic study of enhancing the anomalous Nernst coefficient (S $_{rm ANE}$ ) by modulating its electronic and magnetic structures. In this study, Mn and Co substitution effects for Fe in Fe $_{4}$ N on S $_{ANE}$ were investigated. Fe $_{4-x}$ Mn $_{x}$ N and Fe $_{4-y}$ Co $_{y}$ N films in wide ranges of x and y were grown epitaxially on MgO(001) and (LaAlO $_{3}$ ) $_{0.3}$ (Sr $_{2}$ TaAlO $_{6}$ ) $_{0.7}$ (001) substrates, respectively, using molecular beam epitaxy. The S $_{rm ANE}$ value of the Fe $_{4}$ N film is suppressed by substituting Fe with Mn or Co. By measuring the ANE, Seebeck effect, and anomalous Hall effect, the transverse thermoelectric conductivity ( $alpha_{xy}$ ) was evaluated. The composition dependence of S $_{ANE}$ was dominated by the change of $alpha_{xy}$ for both Fe $_{4-x}$ Mn $_{x}$ N and Fe $_{4-y}$ Co $_{y}$ N films. First-principles calculations were conducted for the transverse electric conductivity ( $sigma_{xy}$ ) and $alpha_{xy}$ of Fe $_{4}$ N and Fe $_{3.1}$ Co $_{0.9}$ N, and large $alpha_{xy}$ leading to large S $_{ANE}$ was predicted in Fe $_{3.1}$ Co $_{0.9}$ N.

論文

Robustness of ferromagnetism in van der Waals magnet FeGeTe to hydrostatic pressure

Wang, Y.*; Zeng, X.-T.*; Li, B.*; Su, C.*; 服部高典; Sheng, X.-L.*; Jin, W.*

Chinese Physics B, 34(4), p.046203_1 - 046203_6, 2025/03

https://doi.org/10.1088/1674-1056/adb26f

被引用回数：0 パーセンタイル：0.00(Physics, Multidisciplinary)

二次元ファンデルワールス強磁性体FeGeTe(FGT)は、その高いキュリー温度、容易な調整性、空気中での優れた構造安定性から、スピントロニクスデバイスへの応用に大きな可能性を秘めている。理論的研究により、外部パラメータとしての圧力が強磁性特性に大きく影響することが示されている。本研究では、5GPaまでの高圧中性子粉末回折(NPD)実験を行い、FGTの静水圧による構造及び磁気特性の変化を調べた。NPDデータは、静水圧による見かけ上の抑制にもかかわらず、FGTにおける強磁性の頑健性を明らかにした。圧力が0から5GPaまで増加すると、キュリー温度は225(5)Kから175(5)Kまで単調減少し、Feの秩序モーメントが劇的に抑制されることがわかった。圧力による構造相転移は5GPaまで観測されなかったが、結合長と結合角の変化を定量的に解析した結果、交換相互作用が大きく変化していることがわかった。

論文

J-PARC MLF BL11におけるリモートデスクトップ接続を用いたリモート解析環境の構築

岡崎伸生*; 服部高典

CROSS Reports(インターネット), 3, p.001_1 - 001_8, 2025/02

https://doi.org/10.57378/crossrep.2025001

大強度陽子加速器施設(J-PARC)の物質・生命科学実験施設(MLF)のBL11に設置されているビームラインPLANETでは、これまで測定したデータをリモート解析したいという要望があったが、それを定常的に行える仕組みが整備されていなかった。この要望に応えるため、リモートデスクトップ接続環境として広く使われているNoMachineを用い、リモート解析が行える仕組みを構築した。このシステムはクラウド上に構築されており、ユーザーはNoMachineクライアントを利用することで、インターネット環境さえあればどこからでも解析することが可能となった。

論文

Study on the effect of radiation-resistant resin on water radiolysis

伊藤辰也; 永石隆二; 桑野涼*; 神戸正雄*; 吉田陽一*

Radiation Physics and Chemistry, 226, p.112198_1 - 112198_5, 2025/01

https://doi.org/10.1016/j.radphyschem.2024.112198

被引用回数：0 パーセンタイル：0.00(Chemistry, Physical)

近年、放射線照射実験や非密封放射性同位元素実験用の容器として、ポリイミドやポリエーテルエーテルケトンなどの耐放射線性樹脂の使用が増えている。しかし、水の分解生成物と樹脂との相互作用の可能性が見つかり、樹脂が放射線場における水中の反応に影響を及ぼすことが懸念された。その相互作用を明らかにするために、線による水の放射線分解における重クロム酸イオン(Cr $_{2}$ O $_{7}$ $^{2-}$ )の還元と過酸化水素(H $_{2}$ O $_{2}$ )の生成を樹脂の有無で比較した。同一線量で樹脂ありの水溶液中のCr $_{2}$ O $_{7}$ $^{2-}$ 還元量は樹脂なしの場合よりも大きくなり、樹脂によってCr $_{2}$ O $_{7}$ $^{2-}$ 還元が促進されることを示した。一方、電子捕捉剤の有無にかかわらず、純水中のH $_{2}$ O $_{2}$ 生成は樹脂の有無にほとんど依存しなかった。これらは、放射線場において水と接触した樹脂とヒドロキシルラジカルとの相互作用を示唆している。

論文

Antiferromagnetism and phase stability of CrMnFeCoNi high-entropy alloy

Zhu, L.*; He, H.*; Naeem, M.*; Sun, X.*; Qi, J.*; Liu, P.*; Harjo, S.; 中島健次; Li, B.*; Wang, X.-L.*

Physical Review Letters, 133(12), p.126701_1 - 126701_6, 2024/09

https://doi.org/10.1103/PhysRevLett.133.126701

被引用回数：3 パーセンタイル：43.84(Physics, Multidisciplinary)

It has long been suspected that magnetism could play a vital role in the phase stability of multi- component high-entropy alloys. However, the nature of the magnetic order, if any, has remained elusive. Here, by using elastic and inelastic neutron scattering, we demonstrate evidence of antiferromagnetic order below 80 K and strong spin fluctuations persisting to room temperature in a single-phase face-centered cubic (fcc) CrMnFeCoNi high-entropy alloy. Despite the chemical complexity, the magnetic structure in CrMnFeCoNi can be described as -Mn-like, with the magnetic moments confined in alternating (001) planes and pointing toward the 111 direction. Combined with first-principles calculation results, it is shown that the antiferromagnetic order and spin fluctuations help stabilized the fcc phase in CrMnFeCoNi high-entropy alloy.

論文

Spin caloritronics in metallic superlattices

関剛斎*; 内田健一*; 高梨弘毅

Journal of Physics; Condensed Matter, 36(33), p.333001_1 - 333001_11, 2024/05

https://doi.org/10.1088/1361-648X/ad4761

被引用回数：1 パーセンタイル：12.05(Physics, Condensed Matter)

Spin caloritronics, a research field studying on the interconversion between a charge current (J $_{rm c}$ ) and a heat current (J $_{rm q}$ ) mediated by a spin current (J $_{rm s}$ ) and/or magnetization (M), has attracted much attention not only for academic interest but also for practical applications. Newly discovered spin-caloritronic phenomena such as the spin Seebeck effect (SSE) have stimulated the renewed interest in the thermoelectric phenomena of a magnet, which have been known for a long time, e.g. the anomalous Nernst effect (ANE). These spin-caloritronic phenomena involving the SSE and the ANE have provided with a new direction for thermoelectric conversion exploiting J $_{rm s}$ and/or M. Importantly, the symmetry of ANE allows the thermoelectric conversion in the transverse configuration between J $_{rm q}$ and J $_{rm c}$ . Although the transverse configuration is totally different from the conventional longitudinal configuration based on the Seebeck effect and has many advantages, we are still facing several issues that need to be solved before developing practical applications. The primal issue is the improvement of conversion efficiency. In the case of ANE-based applications, a material with a large anomalous Nernst coefficient (S $_{rm ANE}$ ) is the key for solving the issue. This review article introduces the increase of S $_{rm ANE}$ can be achieved by forming superlattice structures, which has been demonstrated for several kinds of materials combinations. The overall picture of studies on spin caloritronics is first surveyed. Then, we mention the pioneering work on the transverse thermoelectric conversion in superlattice structures, which was performed using Fe-based metallic superlattices, and show the recent studies for the Ni-based metallic superlattices and the ordered alloy-based metallic superlattices.

論文

Field-induced insulator-metal transition in EuTe

竹内徹也*; 本多史憲*; 青木大*; 芳賀芳範; 木田孝則*; 鳴海康雄*; 萩原政幸*; 金道浩一*; 軽部皓介*; 播磨尚朝*; et al.

Journal of the Physical Society of Japan, 93(4), p.044708_1 - 044708_10, 2024/04

https://doi.org/10.7566/JPSJ.93.044708

被引用回数：0 パーセンタイル：0.00(Physics, Multidisciplinary)

Electrical and magnetic properties of divalent europium antiferromagnet EuTe are studied on single crystals grown from Te-flux method. Antiferromagnetism occurs at 11 K with an insulating ground state. Application of magnetic field induces a sudden resistance drop leading to a phase transition to metallic state. Energy band calculations reveal the appearance of a Fermi surface pocket with Te-5p character induced by the polarized Eu moments.

論文

Overview of development program for engineering scale extraction chromatography MA(III) recovery system

渡部創; 高畠容子; 長谷川健太; 後藤一郎*; 宮崎康典; 渡部雅之; 佐野雄一; 竹内正行

Mechanical Engineering Journal (Internet), 11(2), p.23-00461_1 - 23-00461_10, 2024/04

https://doi.org/10.1299/mej.23-00461

Japan Atomic Energy Agency is developing extraction chromatography technology to recover MA(III) from spent nuclear fuel. Developments in the extraction chromatography system especially focusing on safety and stable operation are required for practical application of the technology. This paper discusses the main tasks that have to be challenged preferentially based on achievements obtained by previous studies and potential MA(III) recovery process flow.

論文

Magnetic layer thickness influence on magnetoelastic properties anisotropy in Co $_{2}$ Fe $_{0.4}$ Mn $_{0.6}$ Si heusler alloy thin films

Nabialek, A.*; Chumak, O.*; 関剛斎*; 高梨弘毅; Baczewski, L. T.*; Szymczak, H.*

IEEE Transactions on Magnetics, 59(11), p.2501405_1 - 2501405_5, 2023/11

https://doi.org/10.1109/TMAG.2023.3287324

被引用回数：2 パーセンタイル：28.34(Engineering, Electrical & Electronic)

The anisotropic magnetoelastic (ME) properties of epitaxial Co $_{2}$ Fe $_{0.4}$ Mn $_{0.6}$ Si(CFMS) Heusler alloy thin films with thicknesses ranging from 8 to 100 nm were investigated using the strain-modulated ferromagnetic resonance (SMFMR) technique. The calculation of the first cubic magnetocrystalline (MC) constant $_{1}$ and the two cubic ME constants $_{1}$ and $_{2}$ was carried out assuming the cubic symmetry of the magnetic layer. A significant negative perpendicular MC anisotropy, of the order of 10 $^{5}$ J/m $^{3}$ , was also observed. The investigated parameters were found to be dependent on the thickness of the magnetic layer. The thinnest magnetic layers showed the strongest cubic MC anisotropy and the weakest anisotropy of ME properties. These findings highlight the importance of considering the magnetic layer thickness when evaluating the anisotropy in the ME properties of Heusler alloy thin films.

論文

Antiferromagnetic films and their applications

廣畑貴文*; Lloyd, D. C.*; 窪田崇秀*; 関剛斎*; 高梨弘毅; 介川裕章*; Wen, Z.*; 三谷誠司*; 小泉洸生*

IEEE Access, 11, p.117443 - 117459, 2023/10

https://doi.org/10.1109/ACCESS.2023.3326448

被引用回数：3 パーセンタイル：20.14(Computer Science, Information Systems)

Spintronic devices are expected to replace the recent nanoelectronic memories and sensors due to their efficiency in energy consumption and functionality with scalability. To date, spintronic devices, namely magnetoresistive junctions, employ ferromagnetic materials by storing information bits as their magnetization directions. However, in order to achieve further miniaturization with maintaining and/or improving their efficiency and functionality, new materials development is required: 1) increase in spin polarization of a ferromagnet or 2) replacement of a ferromagnet by an antiferromagnet. Antiferromagnetic materials have been used to induce an exchange bias to the neighboring ferromagnet but they have recently been found to demonstrate a 100% spin-polarized electrical current, up to THz oscillation and topological effects. In this review, the recent development of three types of antiferromagnets is summarized with offering their future perspectives towards device applications.

論文

Intercorrelated anomalous Hall and spin Hall effect in kagome-lattice Co $_{3}$ Sn $_{2}$ S $_{2}$ -based shandite films

Lau, Y.-C.*; 池田絢哉*; 藤原宏平*; 小沢耀弘*; Zheng, J.*; 関剛斎*; 野村健太郎*; Du, L.*; Wu, Q.*; 塚崎敦*; et al.

Physical Review B, 108(6), p.064429_1 - 064429_11, 2023/08

https://doi.org/10.1103/PhysRevB.108.064429

被引用回数：11 パーセンタイル：72.60(Materials Science, Multidisciplinary)

Magnetic Weyl semimetals (mWSMs) are characterized by linearly dispersive bands with chiral Weyl node pairs associated with broken time-reversal symmetry. One of the hallmarks of mWSMs is the emergence of large intrinsic anomalous Hall effect. On heating the mWSM above its Curie temperature, the magnetism vanishes while exchange-split Weyl point pairs collapse into doubly degenerate gapped Dirac states. Here, we reveal the attractive potential of these Dirac nodes in paramagnetic state for efficient spin current generation at room temperature via the spin Hall effect. Ni and In are introduced to separately substitute Co and Sn in a prototypal mWSM Co $_{3}$ Sn $_{2}$ S $_{2}$ shandite film and tune the Fermi level. Composition dependence of spin Hall conductivity for paramagnetic shandite at room temperature resembles that of anomalous Hall conductivity for ferromagnetic shandite at low temperature; exhibiting peak-like dependence centering around the Ni-substituted Co $_{3}$ Ni $_{1}$ Sn $_{2}$ S $_{2}$ and undoped Co $_{3}$ Sn $_{2}$ S $_{2}$ compositions, respectively. The observed spin Hall and anomalous Hall conductivity maxima at different compositions reflect optimum Fermi-level positioning relative to the paramagnetic Dirac and magnetic Weyl states, suggesting the common origin and intercorrelation between the two Hall effects. Our findings highlight a strategy for the quest of spin Hall materials, guided by the abundant experimental anomalous Hall-effect data of ferromagnets in the literature.

報告書

SPring-8 JAEA専用ビームラインBL22XUの設計

塩飽秀啓; 丸下元治*

JAEA-Research 2022-015, 39 Pages, 2023/05

JAEA-Research-2022-015.pdf:2.74MB

大型放射光施設SPring-8日本原子力研究所専用ビームライン(現在は、日本原子力研究開発機構(JAEA)専用ビームライン)である硬X線アンジュレータビームラインBL22XUの設計を行った。BL22XUは、主に放射性廃棄物処理に係る分離抽出材の設計及び化学的挙動解明を行うためのXAFS(X-ray Absorption Fine Structure)解析実験、回折計を用いた磁性研究実験、高圧プレスやダイヤモンドアンビルセルを用いた極限環境下実験等を行うためのビームラインである。利用可能なX線エネルギー範囲を370keVに設定した。ビームラインの光学系を設計するために、ミラーの反射率、分光結晶の回折幅、Be窓材の吸収率等を計算した。また、光線追跡を行い、各光学素子の材料、寸法、設置場所等を最適化した。さらに、放射性物質利用上の安全確保のため音響遅延管ADL(Acoustic Delay Line)の遅延時間についても検討を行った。BL22XU「重元素科学研究I」は、2002年にビームラインの建設を終え、立ち上げ調整期間を経て、既に運用している。軟X線アンジュレータを光源とするもう一つのJAEA専用ビームラインBL23SU「重元素化科学究II」と共に、2つのビームラインを相補的に利用することによって、原子力科学が直面する多くの問題を解決する放射光ビームラインとして発展することが期待されている。2018年から2019年に分光器の高度化を実施したため、ビームライン建設当時の設計、特徴と性能を改めてここに記録することとした。

論文

Attention-based time series analysis for data-driven anomaly detection in nuclear power plants

Dong, F.*; Chen, S.*; 出町和之*; 吉川雅紀; 関暁之; 高屋茂

Nuclear Engineering and Design, 404, p.112161_1 - 112161_15, 2023/04

https://doi.org/10.1016/j.nucengdes.2023.112161

被引用回数：24 パーセンタイル：99.21(Nuclear Science & Technology)

To ensure nuclear safety, timely and accurate anomaly detection is of utmost importance in the daily condition monitoring of Nuclear Power Plants (NPPs), as any slight anomaly in a plant may result in an irreversible and serious accident, as well as high costs of maintenance and management. Nevertheless, due to the unique inherent attributes of anomalies, the difficulty of automatic detection in NPPs is increased. Previous model-driven anomaly detection approaches required skilled priori knowledge, leading to their limited usability. Commonly adopted deep learning-based data-driven anomaly detection approaches may not easily acquire the most relevant features when dealing with sensor data containing redundant information with uneven distribution of anomalies. To alleviate these issues, this paper propose an attention-based time series model for anomaly detection to ensure safety in NPPs. First, we employ one-dimension convolutional neural network (1D-CNN) backbone for feature extraction to preserve original inherent features of time series inputs. Subsequently, we originally adopt soft-attention mechanism to automatically extract the most relevant temporal features considering the specificity of anomaly detection in NPPs. The performance of the proposed model was experimentally validated on the High Temperature Gas-cooled Reactor (HTGR) anomaly case dataset simulated using the analytical code. The experimental results indicate that the proposed model was capable of detecting anomalies in NPPs with superior performance to the baseline model, while ensuring fast detection at short time steps.

論文

Ferromagnetic crossover within the ferromagnetic order of U $_{7}$ Te $_{12}$

Opletal, P.; 酒井宏典; 芳賀芳範; 常盤欣文; 山本悦嗣; 神戸振作; 徳永陽

Journal of the Physical Society of Japan, 92(3), p.034704_1 - 034704_5, 2023/03

https://doi.org/10.7566/JPSJ.92.034704

被引用回数：3 パーセンタイル：50.64(Physics, Multidisciplinary)

U $_{7}$ Te $_{12}$ の単結晶の物理的性質を調べた。U $_{7}$ Te $_{12}$ が3つの非等価な結晶ウランサイトを持つ六方晶構造を持つことを確認した。常磁性モーメントは、すべてのサイトで一様なモーメントを仮定すると、ウランサイトあたり約1 $mu_{B}$ と推定される。強磁性相転移は $T_{rm C}$ =48Kで発生し、面内磁化は急激に増加するが、面外成分はあまり増加しない。磁場冷却条件下で温度がさらに $T_{rm C}$ 以下に低下すると、面外成分はT $^{star}$ =26K付近で急激に増加する。対照的に、T $^{star}$ 付近で面内成分はほとんど変化しない。比熱測定では、T $^{star}$ 付近に型の異常がないことが示されているため、これらの振る舞いは、秩序した磁気モーメントの再配向、もしくは複数のウランサイトの連続した逐次磁気転移を示唆している。

論文

Electrical detection of domain evolution in magnetic Weyl semimetal Co $_{3}$ Sn $_{2}$ S $_{2}$ submicrometer-wide wire devices

塩貝淳一*; 池田絢哉*; 藤原宏平*; 関剛斎*; 高梨弘毅; 塚崎敦*

Physical Review Materials (Internet), 6(11), p.114203_1 - 114203_9, 2022/11

https://doi.org/10.1103/PhysRevMaterials.6.114203

被引用回数：5 パーセンタイル：33.27(Materials Science, Multidisciplinary)

Microscopic understanding of magnetization switching via domain nucleation and/or domain-wall propagation is fundamental knowledge for developing magnetic and spintronic devices. Here, we explore the underlying mechanism of the large coercivity of the magnetic Weyl semimetal Co $_{3}$ Sn $_{2}$ S $_{2}$ thin films, which is roughly ten times larger than that of Co $_{3}$ Sn $_{2}$ S $_{2}$ bulk single crystal, by measuring Hall resistance in constricted wire devices. The discretized steplike variations appear in the hysteresis loops of the Hall resistance in 0.6 micrometers wide and narrower devices, indicating that the size of the reversed magnetic domain is comparable to the active area of the Hall devices. By counting the number of discrete features, the average diameter of the reversed magnetic domain is estimated to be 80 nm. Individually, the diameter of the reversed domain nucleus is evaluated to be roughly 2 nm. Considering the difference in the diameters of the reversed magnetic domain and the reversed domain nucleus, we ascribed the large coercivity of the Co $_{3}$ Sn $_{2}$ S $_{2}$ thin films to a large nucleation field owing to the uniform crystallinity within grains and strong domain-wall pinning at grain boundaries specific to the thin films. With the large nucleation field in the films, an engineering of the domain-wall pinning sites is a promising approach to control the nucleation, manipulation, and detection of the single domain wall in Co $_{3}$ Sn $_{2}$ S $_{2}$ thin-film devices.

論文

Characteristic Fermi surface properties in -electron systems

大貫惇睦*; 摂待力生*; 芳賀芳範; 竹内徹也*; 辺土正人*; 仲間隆男*

Quantum Science; The Frontier of Physics and Chemistry, p.21 - 63, 2022/10

https://doi.org/10.1007/978-981-19-4421-5_2

Fermi surfaces of -electron systems and the novel physical properties related with crystal symmetry, electronic correlations and magnetic interactions are reviewed. The key materials are CeRhIn, CeIr, EuCuGe and EuPtSi.

論文

Development of a miniature electromagnet probe for the measurement of local velocity in heavy liquid metals

有吉玄; 大林寛生; 佐々敏信

Journal of Nuclear Science and Technology, 59(9), p.1071 - 1088, 2022/09

https://doi.org/10.1080/00223131.2022.2030824

被引用回数：1 パーセンタイル：14.04(Nuclear Science & Technology)

液体重金属中の局所流速計測において、電磁誘導を用いた計測手法は効果的手法の一つである。永久磁石を利用した流速計として、Ricou and Vives' probeやVon Weissenfluh's probeが広く知られているが、これらの流速計は液温上昇に伴う永久磁石の熱減磁により、流速感度および計測体積が低下することが問題点として挙げられる。特に、永久磁石のキュリー温度を超える温度域では流速検出不能となる。そこで本研究では、流速計が持つ温度依存性の解消を目的とし、小型電磁石を内蔵する流速計を開発した。開発された流速計の直径は6mm、長さは155mmである。流速計の基本性能は、室温環境下における矩形管内水銀流れの局所流速分布計測を通して確認され、流速感度および計測体積が評価された。計測された局所流速分布は数値計算によりその妥当性が確認された。

論文

On the adsorption and reactivity of element 114, flerovium

Yakushev, A.*; Lens, L.*; Dllmann, Ch. E.*; Khuyagbaatar, J.*; Jger, E.*; Krier, J.*; Runke, J.*; Albers, H. M.*; 浅井雅人; Block, M.*; et al.

Frontiers in Chemistry (Internet), 10, p.976635_1 - 976635_11, 2022/08

https://doi.org/10.3389/fchem.2022.976635

被引用回数：19 パーセンタイル：79.78(Chemistry, Multidisciplinary)

114番元素フレロビウム(Fl)は現在その化学的性質が研究されている最も重い元素である。Flに関する最初の化学実験では、Flは貴ガス的な性質を持つ元素であると報告された。一方、2番目の研究では、Flは揮発性金属の性質を示すと報告された。より信頼性の高い結論を得るため、我々は更なる実験的研究を行い、二酸化ケイ素と金表面におけるFlの吸着挙動を調べた。その結果、Flは揮発性金属の水銀よりも高い揮発性と低い反応性を示し、一方、貴ガスのラドンよりは反応性が高いことを明らかにした。

論文

Single crystal growth and magnetic properties of noncentrosymmetric antiferromagnet MnIrSi

大貫惇睦*; 金子良夫*; 青木大*; 仲村愛*; 松田達磨*; 中島美帆*; 芳賀芳範; 竹内徹也*

Journal of the Physical Society of Japan, 91(6), p.065002_1 - 065002_2, 2022/06

https://doi.org/10.7566/JPSJ.91.065002

被引用回数：2 パーセンタイル：27.99(Physics, Multidisciplinary)

Single crystals of MnIrSi were grown using Bridgman method. MnIrSi shows a remarkable increase of the electrical resistivity below antiferromagnetic transition temperature accompanied by a large jump of specific heat.

論文

Abrupt change in electronic states under pressure in new compound EuPtAl

小泉尭嗣*; 本多史憲*; 佐藤芳樹*; Li, D.*; 青木大*; 芳賀芳範; 郷地順*; 長崎尚子*; 上床美也*; 金子良夫*; et al.

Journal of the Physical Society of Japan, 91(4), p.043704_1 - 043704_5, 2022/04

https://doi.org/10.7566/JPSJ.91.043704

被引用回数：6 パーセンタイル：58.94(Physics, Multidisciplinary)

A new ternary europium compound EuPtAl is reported. It orders antiferromagnetically at 12.4 K. Application of hydrostatic pressure varies the transition temperature and the compound becomes non-magnetic above the critical pressure 9 GPa. The pressure-temperature phase diagram is indicative of a possible valence crossover at the critical pressure.