Results 221 to 230 of about 21,457 (258)

Overdamped characteristics of multilayered MgB2/AlN/Al/MgB2 Josephson junction

Journal of Applied Physics, 2009
MgB 2 / Al / AlN / MgB 2 multilayered Josephson junctions were fabricated on c-plane sapphire substrates. The measured current-voltage characteristics were well fitted with a resistively and capacitively shunted junction model. For a junction with 0.56-nm-thick AlN and 10-nm-thick Al layers, the current density was 740 A/cm2 and the ICRN product was ...
Hisashi Shimakage, Zhen Wang
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Semimetallicity of free-standing hydrogenated monolayer boron from MgB2

PHYSICAL REVIEW MATERIALS, 2019
Electronic states of a free-standing hydrogenated monolayer boron (HB) sheet were studied via soft X-ray spectroscopies at the B K-shell absorption edge and first-principles calculations. The HB sheet is semimetallic with electron and hole pockets at the
I. Tateishi, Nguyen Thanh Cuong, C. A. Moura, M. Cameau, R. Ishibiki, Asahi Fujino, Susumu Okada, A. Yamamoto, M. Araki, S. Ito, S. Yamamoto, M. Niibe, T. Tokushima, D. Weibel, T. Kondo, M. Ogata, I. Matsuda   +16 more
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Josephson effects in MgB2 break junctions and MgB2/Nb point contacts

Physica C: Superconductivity, 2003
The existence of the irreversibility line is one of the most intrigue features of high temperature superconductors. The irreversibility line is resulted from the short coherence length, large anisotropy and high working temperature of high-T. oxides. For low temperature superconductors, however, there has been experimental evidence of the existence of ...
H.-J. Tao, Z.-Z. Li, Y. Xuan, Z.-A. Ren, G.-C. Che, B.-R. Zhao, Z.-X. Zhao   +6 more
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Extrinsic Two-Dimensional Flux Pinning Centers in MgB2 Superconductors Induced by Graphene-Coated Boron.

ACS Applied Materials and Interfaces, 2019
Extrinsic two-dimensional flux pinning centers, via graphene-encapsulated boron powder as precursors, have been introduced into MgB2 superconductors by means of in situ and diffusion sintering methods.
Wenxian Li, Jixiang Kang, Yang Liu, Mingyuan Zhu, Ying Li, Jiangtao Qu, R. Zheng, Jian-yi Xu, B. Liu   +8 more
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Thermoelectric power of MgB2

Physica C: Superconductivity, 2003
Abstract Thermoelectric power (TEP) of MgB 2 and its changes with the superconducting transition temperature ( T c ) have been investigated. MgB 2 samples synthesized with different techniques––sample 1 by the encapsulation method and sample 2 by the high pressure and high temperature technique––showed different T c ( T c of sample 1= 38.7 K,
D.C Kim, J.S Kim, B.H Kim, Y.W Park, C.U Jung, S.I Lee   +5 more
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Magnetic nanoparticles in MgB2

Physica C: Superconductivity, 2014
Abstract Additional pinning generated by magnetic nanoparticles which were created or inserted within polycrystalline MgB2 superconductor is analyzed. The composites were built in two ways: (i) ceramization of polysiloxane-co-ferrocene based copolymers and (ii) insertion of coated nanoparticles.
Viorel Sandu, Ching Yern Chee
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MgB2 superconductors for applications

Physica C: Superconductivity, 2003
Abstract The paper presents up to date results on MgB 2 filamentary conductors and coated conductors from the point of view of their possible applications. Basic physical parameters of MgB 2 compound relevant to conductor design are introduced. The correlation between the slope of the irreversibility line, critical temperature and critical current ...
B.A. Glowacki, M. Majoros, M. Eisterer, S. Toenies, H.W. Weber, M. Fukutomi, K. Komori, K. Togano   +7 more
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Persistent supercurrents in MgB2

Physica C: Superconductivity, 2003
Abstract Persistent currents were induced in rings of superconducting granular MgB 2 . We measured the magnetic self-fields generated by these currents using a scanning Hall probe. We obtained both the temperature dependence of the persistent current at the critical level between 15 K and T c (39 K) and the time decay of the persistent current for
J.P. Franck, J. Jung, M. Abdelhadi
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Superconductivity of MgB2 wires

Physica C: Superconductivity, 2003
Abstract MgB2 wires were manufactured by the in situ technique, diffusing Mg to B particles, resulting MgB2 with hexagonal structure, after cold deformation. A comparative study of the intergranular current and grain conductivity was conducted by transport and magnetic susceptibility measurements, in magnetic field up to 7 T to define the J c
T.R. Yang, G. Ilonca, A.V. Pop, R. Stiufiuc, O. Furdui   +4 more
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Evaluation of a solid nitrogen impregnated MgB2 racetrack coil

Superconductors Science and Technology, 2018
To develop powerful wind turbine generators using superconducting technology, high-performance superconducting racetrack coils are essential. Herein, we report an evaluation of a multifilamentary magnesium diboride (MgB2) conductor-based racetrack coil ...
D. Patel, W. Qiu, M. Mustapić, J. Knott, Zongqing Ma, D. Gajda, M. Shahabuddin, Jianyi Xu, Seyong Choi, M. Tomsic, S. Dou, Y. Yamauchi, Jung Ho Kim, M. S. Hossain   +13 more
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