For one century superconductivity has been a great challenge to theoretical. Fernandes here we will discuss a new ground state of the interacting electron gas. Today we know that the jump in resistance during entry into the super conducting state amounts to at least 14 orders of magnitude3. Pdf considerable progress has been achieved during the last few decades in the various fields of. Foundations of bcs theory in this section, we lay out the theoretical grounds for bcs theory. Explore ultraconductors with free download of seminar report and ppt in pdf and doc format. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Today we know that the jump in resistance during entry into the superconducting state amounts to at least 14 orders of magnitude3. Uspas course on superconducting accelerator magnets, june 2327, 2003.
The presentation here is in the socalled semiconductor model. Superconductivity was discovered 3 in 1911 by the dutch. Microwave superconductivity, seminar reports ppt pdf. Introduction our present understanding of superconductivity has arisen from a close interplay of theory and experiment. A brief introduction of shock waves which is the recent trend in.
Seminar report in ms word, pdf and power point presentation for applied electronics, computer science, biotechnology, electronics and telecommunication, instrumentation, electrical, civil, chemical, mechanical, information technology and automobile engineering students. Today glasses find applications in various fields viz. Superconductivity is a unique and powerful phenomenon of nature. Phonon mediated attractive interaction and the cooper pairs. In both types of material superconductivity emerges out of phase that are nearly magnetic or evolve under pressure. There existed no consistent microscopic theory that described why superconductivity arose, from the time it was dis.
Concepts of fermi liquid theory and instability of the normal state. Orgad it is the purpose of this paper to explore the theory of high temperature superconductivity. Lecture notes applied superconductivity electrical. More detailed accounts can be found in the excellent text books by w. Superconductivity is the physics of the cooper pairs. Superconductivity is the set of physical properties observed in certain materials, wherein electrical resistance vanishes and from which magnetic flux fields are expelled. Abrikosov, fundamentals of the theory of metalsnorthholland, 1988. Perfect conductor and a super conductor an electric eld ein a normal conductor causes a curwhich, in a steady state, is related to the electric eld by the equation j. Microwave superconductivity, seminar reports ppt pdf doc presentation superconductivity is a phenomenon occurring in certain materials generally at very low temperatures, characterized by exactly zero electrical resistance and the exclusion of the interior magnetic field the meissner effect. Introduction in these lectures i want to give an introduction into the physical principles of superconductivity and its fascinating properties. Even if someone had done so, no one would have believed that such. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from.
Super conductivity part 1 engineering physics 1 lectures. Winner of the standing ovation award for best powerpoint templates from presentations magazine. In this case, the application of a tensile stress produces elongation in the xdirection and contraction in the ydirection, and the distorted element remains rectangular. Introduction to stainless steels asm international. Nearly a century after its first discovery, its full commercial potential is. Introduction to metals metals possess many unique fundamental properties that make them an ideal material for use in a diverse range of applications. Lecture notes on superconductivity a work in progress. Introduction to materials science chapter 18, electrical conductivity 3 basic laws and electrical properties of metals ii the electrical conductivitythe ability of a substance to conduct an electric current is the inverse of the resistivity. This page is designed as a basic introduction to conductivity and eddy current ect conductivity measuring within nondestructive testing ndt. Introduction to the theory of superconductivity pdf 82p this note covers the following topics.
Below tc the resistivity of superconductor becomes. We will compare also the electronphonon mechanism for superconduc. Super conductor and super conductivity ppt xpowerpoint. Figure 4 shows the large variation in thermal conductivity among various types of materials. Ppt superconductivity powerpoint presentation free to download id. Superconductivity and physics of nanomaterials prepared by p g logan, dept of physics, sistk, puttur. A description of superconductivity in a little more detail than you need at a level to explain the basic concepts of a quantum mechnical phenomenon. The transparent and colouration have made the glasses best suitable for decorative and illumination purposes in the early days of their invention. The adobe flash plugin is needed to view this content.
Hence, in the superconducting state a metal can have a specific electrical resistance that is at most about 17 orders of magnitude smaller than the specific resistance of copper, one of. A microscopic theory of superconductivity was developed in 1957 by john bardeen, leon cooper and j. Here it is appropriate to remark that in the bcs theory not single electrons but pairs of electrons are the carriers of the supercurrent. Robert schrieffer, which is known as the bcs theory. Introduction superconductivity discovered in 1911 by onnes 9, is the. In a metal the charge carriers are electrons, and at a constant temperature. Superconductivity is widely regarded as one of the great scientific discoveries of the 20th century. Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered even. It was not yet discovered whether the resistance remains 0, or it is exactly 0 due to experimental results. The central feature of the bcs theory is that two electrons in the superconductor are able to form a bound pair called a cooper pair if they somehow experience an attractive interaction between.
Supercapacitors, which are often called electrical doublelayer capacitors edlcs, pseudocapacitors, ultracapacitors, power capacitors, gold capacitors, or power caches, have attracted research interest worldwide because of their potential applications as energy storage devices in many fields. This temperature, called the transition temperature, varies for different materials but generally is below 20 k. Introduction superconductivity discovered in 1911 by onnes 9, is the quantum phenomena that certain materials exhibit under particular magnetic and temperature regimes. Properties such as high tensile strength, high fracture toughness, malleability and availability are just some of the many advantages associated with metals. Searching for room temperature superconductors novam research. Explore ultra conductors with free download of seminar report and ppt in pdf and doc format. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Pdf overview of superconductivity and challenges in applications. Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered even down to near absolute zero, a superconductor has a.
Several applications of superconductivity in the electric power sector have undergone extensive evaluation and even prototype development. Accordingly, it examines the major present and potential applications of superconductors in seven different sectors. Ultraconductors seminar report, ppt, pdf for electrical. View and download powerpoint presentations on super conductor and super conductivity ppt.
Ppt superconductivity powerpoint presentation free to download. Ph 318 introduction to superconductors 6 r r e d l d dt z. Of the various constituent phenomena, the two which are. Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. Scribd is the worlds largest social reading and publishing site. In nite conductivity implies that if a current were passed through the material during its superconducting phase, the current would follow forever. Electrical conductivity is the measurement of a materials ability to conduct an electric current. The introduction of superconductivity in the industrial cycle faces many challenges, first for the. Ultra conductors seminar report, ppt, pdf for electrical. In the bulk of a thick superconductor there can be no magnetic. Tinkham, introduction to superconductivity 2nd editiondover, 2004. Any material exhibiting these properties is a superconductor. As a result, from our basic understanding of metallic conduction. Introduction to composite materials asm international.
Superconductivity, complete disappearance of electrical resistance in various solids when they are cooled below a characteristic temperature. In both types of material superconductivity emerges out of phase that are nearly magnetic or evolve under pressure from a magneticallyordered state. All materials have defects and phonons and to a lessor degree of importance, electronelectron interactions. Ppt superconductivity powerpoint presentation free to. An overview of the impact of superconductivity on these applications is provided in table 31. It occurs in a wide variety of metals and alloys, below a transition temperature tc which currently ranges up to. Introduction superconductivity refers to a complex of phenomena which are usually found to occur together. It would have been very difficult to have arrived at the theory by purely deductive reasoning from the basic equations of quantum mechanics. Electrical properties of materials electronic conduction in solids. Pdf introduction to engineering material and their. Superconductivity was discovered by kamerlingh onnes in 1911.
His understanding of superconductivity was based on the concept of. Then an introduction of the generalizedbcs theory is given and sev. Superconductivity by joe khachan and stephen bosi the discovery of superconductors the phenomenon of superconductivity, in which the electrical resistance of certain materials completely vanishes at low temperatures, is one of the most interesting and sophisticated in condensed matter physics. Before the external magnetic field was turned off there was a magnetic flux. Free superconductivity books download ebooks online. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Hence, in the superconducting state a metal can have a specific electrical resistance that is at most about 17 orders of magnitude smaller. Hence conductivity of ion conducting glasses is a function of both.
Super conductivity destroyed by modest magnetic field critical field b 0c. Youngseak lee, in advanced fluoridebased materials for energy conversion, 2015. All derivations may be referenced in \theory of superconductivity by bardeen, cooper, and schrie er or tinkhams introduction to superconductivity. The superconducting properties of small specimens 9. Superconductivity, discovered in 1911 by heike kamerlingh onnes, is a phenomenon occurring in certain materials at extremely low temperatures. Much of the motivation for this comes from the study of the cuprate high temperature superconductors. Nov 20, 2014 basic information regarding superconductors. Their mass is mc 2me, their charge 2e, their density nc ns2. Find materials for this course in the pages linked along the left. Superconductivity is a state of metals below a certain critical temperature. Electrons repel each other in vacuum but under certain circumstances when in a crystal lattice they can attract each other and. Ppt superconductors powerpoint presentation free to. Introduction to conductivity this page is designed as a basic introduction to conductivity and eddy current ect conductivity measuring within nondestructive testing ndt.
Schrieffer,theory of superconductivityperseus books, 1999 t. Find powerpoint presentations and slides using the power of, find free presentations research about super conductor and super conductivity ppt. This presentation can be downloaded as pdf via the following. Free superconductivity books download ebooks online textbooks. Page 1 superconductivity introduction the phenomenon of attaining zero resistivity or infinite conductivity at low temperature is known as superconductivity.
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