Search Results 1-20 of 5215

  • Inhomogeneous superconductivity in thin crystals of FeSe1-xTex (x=1.0, 0.95, and 0.9)

    Eguchi Ritsuko , Senda Megumi , Uesugi Eri , Goto Hidenori , Fujiwara Akihiko , Imai Yasuhiko , Kimura Shigeru , Noji Takashi , Koike Yoji , Kubozono Yoshihiro

    … We investigated the temperature dependence of resistivity in thin crystals of FeSe1-xTex (x = 1.0, 0.95, and 0.9), though bulk crystals with 1.0 x 0.9 are known to be non-superconducting. … With decreasing thickness of the crystals, the resistivity of x = 0.95 and 0.9 decreases and reaches zero at a low temperature, which indicates a clear superconducting transition. …

    Materials Research Express 7(3), 036001, 2020-03-16

    IR 

  • Proximity coupling of superconducting nanograins with fractal distributions

    Uchino Takashi , Teramachi Nanami , Matsuzaki Ryosuke , Tsushima Emi , Fujii Shusuke , Seto Yusuke , Takahashi Kazuyuki , Mori Takao , Adachi Yutaka , Nagashima Yukihito , Sakaguchi Yoshifumi , Ohishi Kazuki , Koda Akihiro , Sakurai Takahiro , Ohta Hitoshi

    … Irrespective of the low volume fraction of MgB2 nanograins, the nanocomposite behaves as a bulk-like superconductor, i.e., zero resistivity, perfect diamagnetism, and strong vortex pinning. … Transverse-field muon spin rotation measurements reveal that the mean internal field in the superconducting mixed state increases with decreasing temperature below which the Josephson phase coherence sets in, opposite to the diamagnetic response observed in magnetization measurements. …

    Physical Review B 101(3), 035146, 2020-01-27

    IR 

  • The Advanced Super Invar Alloys with Zero Thermal Expansion for Space Telescopes

    ONA Kotaro , SAKAGUCHI Naoki , OHNO Haruyasu , UTSUNOMIYA Shin

    … However, the decrease in Ni content increases the martensitic transformation temperature (Ms). … We have developed novel alloys, which exhibit near-zero CTE and low Ms simultaneously. … It exhibited CTE of 0±1×10<sup>-7</sup>/K (60-100K) and martensitic transformation did not occur even at liquid He temperature (4K). …

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN 18(3), 32-37, 2020

    J-STAGE 

  • THE ACTUAL CONDITION ELUCIDATION OF MICROBIOME IN A COOL OR HEAT PIT PART1: COMPARISON OF BACTERIAL FLORA BETWEEN INDOOR ENVIRONMENTS AND THE ENVIRONMENT IN A PIT  [in Japanese]

    NIIMURA Mizuki , YANAGI U , KAGI Naoki , KIM Hoon , HATANAKA Miku

    … <p> To realize a Net-Zero Energy Building, it is necessary to reduce the amount of energy used for air-conditioning. … However, when compared with the surface temperature of a cooling pit, the dew point temperature of outdoor air is high in the summer, and this leads to dew condensation inside the pit. …

    Journal of Environmental Engineering (Transactions of AIJ) 85(770), 259-266, 2020

    J-STAGE 

  • BEHAVIOR OF LEAD RUBBER BEARING BY HEAT ACCOMPANY MULTI-CYCLIC LOADING (PART 2): MODELING OF HEAT RADIATION EFFECT FOR ANALYSIS OF HEATING INTERACTION BEHAVIOR  [in Japanese]

    YUKAWA Masaki , INABA Satoru , TAKEUCHI Yoshitaka , FURUHASHI Takeshi , MORI Takahiro , NAITO Nobuyuki

    … The contact area ratio was about 0.8 even if the shear strain was zero percent and not in complete contact, and almost fixed to 50 percent. … The result of the analysis accurately reproduced the internal temperature distribution of the equipment without dependence on the loading velocity, and the heat loss characteristics after the loading almost conformed with the test result.</p> …

    Journal of Structural and Construction Engineering (Transactions of AIJ) 85(770), 485-495, 2020

    J-STAGE 

  • Seamless monitoring of internal strain during processing and drilling in a CFRP cross-ply laminate

    NASRULLAH Baso , OGI Keiji , MIZUKAMI Koichi

    … The strains during processing and drilling were calculated from the Bragg wavelength shift and the temperature change measured using an embedded FBG (Fiber Bragg Grating) sensor and a thermocouple, respectively. … The absolute internal strain was consistently monitored through processing (curing) to machining (drilling) by defining the strain at the gel point to zero. …

    Materials System 37(0), 79-83, 2020

    J-STAGE 

  • Model analysis of a detached plasma in the linear divertor simulator TPD-Sheet IV  [in Japanese]

    HANAI Keito , ENDO Ryuta , TAKIMOTO Toshikio , TONEGAWA Akira , KAWAMURA Kazutaka , SATO Kohnosuke

    … The electron temperature and density have been measured with the linear divertor simulation device TPD-sheet IV. … To model the ion density, a zero-dimensional model has been developed for solving the system of rate balance equations. …

    Journal of Advanced Science 32(0), n/a, 2020

    J-STAGE 

  • Estimation of Rectifying Performance for Terahertz Wave in Newly Designed Fe/ZnO/MgO/Fe Magnetic Tunnel Junction

    Saito H. , Imamura H.

    … Effective current responsivity up to 0.09 A/W at 1 THz was obtained under zero-bias voltage condition at room temperature. …

    Journal of the Magnetics Society of Japan 44(2), 26-29, 2020

    J-STAGE 

  • Development of stress on quartz grain in illite ceramics during cooling stage of firing

    ŠTUBŇA Igor , MÁNIK Marek , HÚLAN Tomáš , TRNÍK Anton

    … The tensile tangential stress which is developed between the glass transformation temperature and β → α transition of quartz can be a source of the first microcracking. … These changes are in a narrow temperature interval around the β → α transition of quartz passing through zero value and no cracks are expected. … When the β → α transition of quartz is finished and the temperature decreases, the creation of the cracks continues. …

    Journal of the Ceramic Society of Japan 128(3), 117-123, 2020

    J-STAGE 

  • 1G and Microgravity Tank Self-Pressurization: Experiments and CFD Model Validations across Ra and Bo Regimes

    KASSEMI Mohammad , HYLTON Sonya , KARTUZOVA Olga

    … In the first study, 1G pressurization of a simulant low-boiling point fluid in a small scale transparent tank is considered in the context of the Zero-Boil-Off Tank (ZBOT) Experiment. … It is shown that computational predictions of tank pressure and temperature evolution for this moderate Ra and high Bo number regimes are in excellent temporal and spatial agreement with their experimental counterparts. …

    International journal of microgravity science and application 37(1), 370103, 2020

    J-STAGE 

  • High Pressure Rheology of Lubricants (Part 4):―Proposal of Liquid State Equation and Estimation of High Pressure Density―  [in Japanese]

    KANEKO Masato

    … <p>The physical properties of lubricant under high temperature and high pressure include high pressure viscosity, high pressure density, bulk modulus, coefficient of thermal expansion, etc. … Therefore, in this report, using the high pressure density measuring device, the volume was obtained from the measurement of the density at each temperature and pressure, and the PVT relational equation was derived. …

    JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS 65(1), 45-60, 2020

    J-STAGE 

  • First-principles calculation of anharmonic properties of phonons  [in Japanese]

    TADANO Terumasa

    <p>第一原理フォノン計算はフォノンダイナミクスの理解・予測を可能にする強力な手法である.しかし,現在広く普及している調和近似は原子のゼロ点振動や熱振幅が大きい場合に破綻し,また格子熱伝導や構造相転移などポテンシャルの非調和性が本質である物理現象を扱えない問題がある.これを解決するため,準調和近似(QHA)を超えて非調和効果を精密に扱う第一原理計算手法が近年提案されている.本稿では,自 …

    Oyo Buturi 89(1), 35-39, 2020

    J-STAGE 

  • Hyperbolic fracton model, subsystem symmetry, and holography. II. The dual eight-vertex model

    Han Yan

    … At zero temperature, the dual eight-vertex model is a discrete realization of the bit-thread model, a powerful tool developed to visualize holography. …

    Physical Review B 100(24), 245138, 2019-12-23

    IR 

  • Systematic method to evaluate energy dissipation in adiabatic quantum-flux-parametron logic

    Yamae Taiki , Takeuchi Naoki , Yoshikawa Nobuyuki

    … It operates with zero static power dissipation and very low dynamic power dissipation owing to adiabatic switching. … In previous numerical studies, we have evaluated the energy dissipation of basic AQFP logic gates and demonstrated sub-kBT switching energy, where kB is Boltzmann's constant and T is the temperature, by integrating the product of the excitation current and voltage associated with the gates over time. …

    Journal of Applied Physics (126), 173903, 2019-11-01

    IR 

  • 2019-11-15

    Nakano Akitoshi , Nagai Takayuki , Katayama Naoyuki , Sawa Hiroshi , Taniguchi Hiroki , Terasaki Ichiro

    … A large thermopower of 600 µV/K at 100 K suddenly drops toward zero down to 50 K, and this zero thermopower evidences the neutral particles flow against the applied temperature gradient. …

    Journal of the Physical Society of Japan 88(11), 113706-1-4, 2019-11

    IR  DOI 

  • Ultra-long coherence times amongst room-temperature solid-state spins

    Herbschleb E. D. , Kato H. , Maruyama Y. , Danjo T. , Makino T. , Yamasaki S. , Ohki I. , Hayashi K. , Morishita H. , Fujiwara M. , Mizuochi N.

    … Although enrichment of the spin-zero 12C and 28Si isotopes drastically reduces spin-bath decoherence in diamond and silicon, the solid-state environment provides deleterious interactions between the electron spin and the remaining spins of its surrounding. … Single electron spins show the longest inhomogeneous spin-dephasing time (T∗2≈1.5 ms) and Hahn-echo spin-coherence time (T2 ≈ 2.4 ms) ever observed in room-temperature solid-state systems, leading to the best sensitivities. …

    Nature Communications (10), 2019-08-28

    IR 

  • Low temperature desalination by Eutectic Freeze Crystallization (EFC) : Towards achieving zero liquid discharge in water treatment  [in Japanese]

    Ahmad Arslan , Harmsen Danny , Huiting Hans , 千葉県企業局工業用水部施設設備課

    工業用水 = Journal of industrial water (655), 11-22, 2019-07

  • Magnetic and magneto-transport properties of Mn4N thin films by Ni substitution and their possibility of magnetic compensation

    都甲 薫 , 末益 崇 , Taro Komori , Toshiki Gushi , Akihito Anzai , Laurent Vila , Jean-Philippe Attané , Stefania Pizzini , Jan Vogel , Shinji Isogami , Kaoru TOKO , Takashi SUEMASU

    … Here, we study the possibility of achieving compensation at room temperature in Mn4−xNixN films grown on SrTiO3(001) substrates by molecular beam epitaxy. … Further, the magnetization increased for x = 0 and 0.1 and decreased for x = 0.25 when the temperature was decreased. … Based on these results, we propose that there is a magnetic compensation composition between x = 0.1 and 0.25, where the magnetization of Mn4−xNixN becomes zero at room temperature. …

    Journal of applied physics 125(21), 213902, 2019-06

    IR 

  • CRYSTAL SYNTHESIS AND VERIFICATION OF THE PRESENCE OF SUPERCONDUCTIVITY IN LIMGN  [in Japanese]

    岩本 峻

    … Typical reaction temperature and time are 400℃~900℃ and 3h~12h, respectively. … When the relationship between temperature and resistance of LiMgN was measured from 300 to 15 K, the resistance gradually decreased. … The resistance of LiMgN did not become zero, and no superconductivity was observed. …

    法政大学大学院紀要. 理工学・工学研究科編 (60), 1-4, 2019-03-31

    IR  DOI 

  • Life history of Phonarellus ritsemai (Orthoptera: Gryllidae)(1) Egg development and egg period  [in Japanese]

    新井 哲夫 , 渡邊 宇一

    … Eggs that were kept at a constant temperature of 35ºC or 15ºC all died. … Thus the developmental zero point was estimated at 15.1ºC with the development of 254.7 cumulative growing degree-days. … At a constant temperature of 25ºC, eggs exhibited punctuated growth from oviposition to eclosion, growing rapidly for four days along both the minor and major axes from the 6th to 9th day after oviposition, and changing little thereafter until hatching. …

    山口県立大学学術情報 (12), 9-15, 2019-03-29

    IR 

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