Suprajohtuvissa

Suprajohtuvissa are a class of materials that exhibit superconductivity at temperatures above the boiling point of liquid nitrogen (77 Kelvin or -196 degrees Celsius). This is in contrast to conventional superconductors, which typically require much lower temperatures, often close to absolute zero. The discovery of suprajohtuvissa has significant implications for practical applications, as it allows for the use of more readily available and less expensive cooling systems.

The first suprajohtuvissa material was discovered in 1986 by Georg Bednorz and Alex Müller, for which they were awarded the Nobel Prize in Physics in 1987. This material, yttrium barium copper oxide (YBCO), has a critical temperature (Tc) of around 92 Kelvin. Since then, many other suprajohtuvissa materials have been discovered, with some achieving critical temperatures above 130 Kelvin.

Suprajohtuvissa materials are typically complex oxides or cuprates, which are layered structures composed of copper and oxygen atoms. The exact mechanism behind their superconductivity is still not fully understood, but it is believed to involve the interaction of electrons with lattice vibrations or spin fluctuations.

Despite their potential, suprajohtuvissa materials face challenges in terms of stability, cost, and manufacturability. However, ongoing research continues to explore new materials and techniques to overcome these obstacles and bring the benefits of suprajohtuvissa to a wider range of applications.