The extraordinary superconductivity has been observed in a pressurized commercial niobium-titanium alloy. Its zero-resistance superconductivity persists from ambient pressure to the pressure as high as 261.7 GPa, a record-high pressure up to which a known superconducting state can continuously survive. Remarkably, at such an ultra-high pressure, although the ambient pressure volume is shrunk by 45% without structural phase transition, the superconducting transition temperature (T ) increases to ≈19.1 K from ≈9.6 K, and the critical magnetic field (H ) at 1.8 K has been enhanced to 19 T from 15.4 T. These results set new records for both the T and the H among all the known alloy superconductors composed of only transition metal elements. The remarkable high-pressure superconducting properties observed in the niobium-titanium alloy not only expand the knowledge on this important commercial superconductor but also are helpful for a better understanding on the superconducting mechanism.
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http://dx.doi.org/10.1002/adma.201807240 | DOI Listing |
Nanomaterials (Basel)
February 2024
Institute of Chemical Technology of Inorganic Materials, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, Austria.
A broad compositional range of Nb-Ti anodic memristors with volatile and self-rectifying behaviour was studied using a combinatorial screening approach. A Nb-Ti thin-film combinatorial library was co-deposited by sputtering, serving as the bottom electrode for the memristive devices. The library, with a compositional spread ranging between 22 and 64 at.
View Article and Find Full Text PDFACS Omega
September 2023
Kocaeli Vocational School of Health Services, Department of Medical Services and Techniques, Medical Imaging Techniques Program, Kocaeli University, Kocaeli 41380, Turkey.
The interactions of a biomaterial with tissues must be determined for the material to be fully compatible with the body for a long time. The tissue and environment where the material is implanted are highly affected by its content. Titanium-6Aluminum-4Vanadium is widely used in orthopedics and dentistry.
View Article and Find Full Text PDFJ Chem Phys
August 2020
Computational Multiscale, Center for Computing Research, Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
We present a scale-bridging approach based on a multi-fidelity (MF) machine-learning (ML) framework leveraging Gaussian processes (GP) to fuse atomistic computational model predictions across multiple levels of fidelity. Through the posterior variance of the MFGP, our framework naturally enables uncertainty quantification, providing estimates of confidence in the predictions. We used density functional theory as high-fidelity prediction, while a ML interatomic potential is used as low-fidelity prediction.
View Article and Find Full Text PDFAdv Mater
March 2019
Institute of Physics, National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing, 100190, China.
The extraordinary superconductivity has been observed in a pressurized commercial niobium-titanium alloy. Its zero-resistance superconductivity persists from ambient pressure to the pressure as high as 261.7 GPa, a record-high pressure up to which a known superconducting state can continuously survive.
View Article and Find Full Text PDFJ Nanosci Nanotechnol
April 2019
Automotive Components and Materials R&D Group, Korea Institute of Industrial Technology, 6, Cheomdangwagi-ro 208beon-gil, Buk-gu, Gwangju, 61012, Korea.
Niobium-titanium alloy is attractive materials for industrials as a superconducting magnets to high critical magnetic field and supercurrent density at -283 °C. The Nb-Ti alloy has been shown in earlier work to exhibit Van Gosh Sky microstructures. They may also be accentuated by plastic deformation due to work and temperature exposure during deformation.
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