Results 41 to 50 of about 21,457 (258)

Superconducting joints using reacted multifilament MgB2 wires: A technology toward cryogen-free MRI magnets

Journal of Magnesium and Alloys
The development of superconducting joining technology for reacted magnesium diboride (MgB2) conductors remains a critical challenge for the advancement of cryogen-free MgB2-based magnets for magnetic resonance imaging (MRI).
Dipak Patel, Akiyoshi Matsumoto, Hiroaki Kumakura, Yuka Hara, Toru Hara, Minoru Maeda, Hao Liang, Yusuke Yamauchi, Seyong Choi, Jung Ho Kim, Md Shahriar A. Hossain   +10 more
doaj   +1 more source

Large diameter multiwall nanotubes of MgB2: structural aspects and stability of superconducting nanotubular magnesium boride

, 2015
Based on a theoretical study, we demonstrated that magnesium boride nanotubes can reach the same stability as bulk MgB2 structure. However, most stable nanotubular forms are not structurally derived from mixed triangular-hexagonal structural motifs of a ...
Banacky, P., Noga, J., Noga, P., Szocs, V.   +3 more
core   +1 more source

Very high upper critical fields in MgB2 produced by selective tuning of impurity scattering [PDF]

, 2003
We report a significant enhancement of the upper critical field $H_{c2}$ of different $MgB_2$ samples alloyed with nonmagnetic impurities. By studying films and bulk polycrystals with different resistivities $\rho$, we show a clear trend of $H_{c2 ...
A Gurevich, A Siri, Ando Y, Angst M, Belashchenko K D, Bouquet F, C B Eom, C Mielke, Canfield P C, Canfield P C, Cava R J, Chen X K, Cubitt R, D C Larbalestier, D M Kim, E E Hellstrom, Fietz W A, Flukiger R, Golubov A A, Grant P, Gurevich A, Iavarone M, J Giencke, J H Choi, K H Kim, Ketterson J B, Koshelev A E, L D Cooley, L J Belenky, Larbalestier D C, Liu A Y, M K Lee, Mazin I I, Orlando T P, Patnaik S, Perkins G K, Rowell J M, S D Bu, S Patnaik, Schmidt H, Sologubenko A V, Song X, V Braccini, W Tian, X Q Pan, X Song, Zehetmayer M   +46 more
core   +1 more source

A sol-gel method for growing superconducting MgB2 films

, 2011
In this paper we report a new sol-gel method for the fabrication of MgB2 films. Polycrystalline MgB2 films were prepared by spin-coating a precursor solution of Mg(BH_4)_2 diethyl ether on (001)Al2O3 substrates followed with annealing in Mg vapor.
C Zhang, Feng Y, Gurevich A, Hanna M, Hascicek Y S, J Z Yang, Kovác P, Kuhberger M, Kullberg M L, L P Chen, Martínez E, Moeckly B H, Q R Feng, Rowell J M, Shen Y, Vaglio R, X G Li, Y B Wang, Y Wang, Z Z Gan   +19 more
core   +1 more source

Paramagnetic Meissner effect in MgB2

Physica C: Superconductivity, 2004
Abstract We observed the paramagnetic Meissner effect (PME) in MgB 2 pellets after cooling in low fields of less than 1 Oe. As external magnetic field increases, the paramagnetic response of the sample decreases and disappears completely at 1 Oe. Effect of gamma irradiation on magnetic properties of MgB 2 has been investigated at low fields.
Sozeri, H, Dorosinskii, L, Topal, U, Ercan, I   +3 more
openaire   +2 more sources

Topological superconducting phase in high-Tc superconductor MgB2 with Dirac–nodal-line fermions [PDF]

npj Computational Materials, 2017
Topological superconductors are an intriguing and elusive quantum phase, characterized by topologically protected gapless surface/edge states residing in a bulk superconducting gap, which hosts Majorana fermions.
Kyung-Hwan Jin, Huaqing Huang, J. Mei, Zheng Liu, L. Lim, Feng Liu   +5 more
semanticscholar   +2 more sources

Transport Properties and Exponential n-values of Fe/MgB2 Tapes With Various MgB2 Particle Sizes

, 2003
Fe/MgB2 tapes have been prepared starting with pre-reacted binary MgB2 powders. As shown by resistive and inductive measurements, the reduction of particle size to a few microns by ball milling has little influence on Bc2, while the superconducting ...
C. Senatore, D. Uglietti, Dhallé, Dubois, Eisterer, Flükiger, Flükiger, H.L. Suo, Jin, N. Clayton, Nagamatsu, P. Lezza, R. Flükiger, Serquis, Suo, V. Abächerli, Wang   +16 more
core   +2 more sources

Plastid and nuclear phylogenomics of Cyphostemma (Vitaceae) provide new insights into genome size evolution across sub‐Saharan Africa

Journal of Integrative Plant Biology, Volume 68, Issue 5, Page 1399-1420, May 2026.
Some African Cyphostemma species evolved much larger genomes as they adapted to dry, rocky habitats. These expansions are linked to succulent traits and specialization on nutrient‐rich limestone outcrops. The findings show how climate‐driven aridification shaped plant evolution and highlight broader genome‐environment patterns across flowering plants ...
Rindra M. Ranaivoson, Romer N. Rabarijaona, Jin‐Ren Yu, Yi‐Chen You, Russell L. Barrett, Ju Zhou, Bing Liu, Wyckliffe Omondi Omollo, Chuan‐Yu Du, Da‐Ming Zhang, Mijoro Rakotoarinivo, Jie Cheng, Chao‐Bin Li, Yang Dong, Ilia J. Leitch, Alexandre Antonelli, Jun Wen, Zhi‐Duan Chen, Li‐Min Lu   +18 more
wiley   +1 more source

Significant improvement of Jc and flux pinning force of MgB2 by doping NTE-ZrW2O8 particles

Journal of Magnesium and Alloys
Although introducing second phase particles as additional pinning centers is an effective method to improve the current carrying capacity of MgB2, the thermal strain caused by second phase particles in MgB2 and their impact on flux pinning have not ...
Tianqi Weng, Lingkai Yuan, Chuan Ke, Cui Hua Cheng, Yong Zhao   +4 more
doaj   +1 more source

Combustion performance of hybrid rocket fuels loaded with MgB2 and carbon black additives

Propulsion and Power Research, 2023
Paraffin-based fuel has a great potential for several innovative missions, including space tourism, due to its safety, low environmental impact, high performance and low cost.
Yash Pal, Sasi Kiran Palateerdham, Sri Nithya Mahottamananda, Subha Sivakumar, Antonella Ingenito   +4 more
doaj   +1 more source