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Chapter 20: Problem 32

Cite the primary limitation of the new superconducting materials that have relatively high critical temperatures.

Short Answer

Expert verified
Answer: The primary limitation of new superconducting materials with relatively high critical temperatures is that they require extremely high pressures to achieve superconductivity, which is not practical for most real-world applications.

Step by step solution

01

Understand the concept of superconductivity

Superconductivity is a phenomenon that occurs in certain materials when they are cooled below a specific temperature called the critical temperature. At this temperature, the material's electrical resistance drops to zero, allowing it to conduct electricity without any loss of energy.
02

Define relatively high critical temperatures

A relatively high critical temperature in the context of superconducting materials means that they become superconducting at temperatures above the critical temperatures of conventional superconductors, which are typically below -200掳C. This makes them more practical for various applications as they can operate at easier to achieve and maintain temperatures.
03

Identify the primary limitation of new superconducting materials with relatively high critical temperatures

The primary limitation of these new superconducting materials with relatively high critical temperatures is that they require extremely high pressures to achieve superconductivity, which is not practical for most real-world applications. The high pressure requirement often limits the use of such materials in practical applications such as electronics and energy transmission, and thus remains a significant challenge for scientists and engineers to overcome.

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Most popular questions from this chapter

The following data are for a plain carbon steel alloy: \begin{tabular}{cccc} \hline \(\boldsymbol{H}(\boldsymbol{A} / \mathrm{m})\) & \(\boldsymbol{B}(\) tesla \()\) & \(\boldsymbol{H} \mathbf{( A / m )}\) & \(\boldsymbol{B}\) (tesla) \\ \hline 0 & 0 & 80 & \(0.90\) \\ \hline 15 & \(0.007\) & 100 & \(1.14\) \\ \hline 30 & \(0.033\) & 150 & \(1.34\) \\ \hline 50 & \(0.10\) & 200 & \(1.41\) \\ \hline 60 & \(0.30\) & 300 & \(1.48\) \\ \hline 70 & \(0.63\) & & \\ \hline \end{tabular} (a) Construct a graph of \(B\) versus \(H\). (b) What are the values of the initial permeability and initial relative permeability? (c) What is the value of the maximum permeability? (d) At about what \(H\) field does this maximum permeability occur? (e) To what magnetic susceptibility does this maximum permeability correspond?

Confirm that there are \(1.72\) Bohr magnetons associated with each cobalt atom, given that the saturation magnetization is \(1.45 \times 10^{6} \mathrm{~A} / \mathrm{m}\), that cobalt has an HCP crystal structure with an atomic radius of \(0.1253 \mathrm{~nm}\) and a \(c / a\) ratio of \(1.623\).

Cite the differences between hard and soft magnetic materials in terms of both hysteresis behavior and typical applications.

A net magnetic moment is associated with each atom in paramagnetic and ferromagnetic materials. Explain why ferromagnetic materials can be magnetized permanently, whereas paramagnetic ones cannot.

Briefly describe the Meissner effect.
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