CE ÎNSEAMNĂ SUPERCONDUCTIVITY ÎN ENGLEZĂ?
supraconductibilitate
Supraconductivitatea este un fenomen de rezistență electrică exactă la zero și de expulzare a câmpurilor magnetice care apar în anumite materiale când este răcit sub o temperatură critică caracteristică. A fost descoperită de fizicianul olandez Heike Kamerlingh Onnes la 8 aprilie 1911, în Leiden. Ca și feromagnetismul și liniile spectrale atomice, superconductivitatea este un fenomen mecanic cuantic. Se caracterizează prin efectul Meissner, ejectarea completă a liniilor de câmp magnetic din interiorul supraconductorului, în timp ce acesta trece în starea superconductoare. Apariția efectului Meissner indică faptul că superconductivitatea nu poate fi înțeleasă doar ca idealizare a conductivității perfecte în fizica clasică. Rezistența electrică a conductorului metalic scade treptat pe măsură ce temperatura este scăzută. În conductorii obișnuiți, cum ar fi cuprul sau argintul, această scădere este limitată de impurități și alte defecte. Chiar și aproape de zero absolută, o probă reală a unui conductor normal arată o anumită rezistență. Într-un superconductor, rezistența scade brusc la zero când materialul este răcit sub temperatura critică.
Definiția superconductivity în dicționarul Engleză
Definiția superconductivității în dicționar este proprietatea anumitor substanțe care nu au rezistență electrică. În metale se întâmplă la temperaturi foarte scăzute, dar la unele materiale ceramice apare o superconductivitate la temperaturi mai ridicate.
CITATE ÎN ENGLEZĂ CU «SUPERCONDUCTIVITY»
Citate renumite și propoziții cu cuvântul
superconductivity.
Superconductivity helped broaden my professional phase space. When I started my work, it was already known that magnetic fields could quench superconductivity. I found that the transition was not continuous, that superconductivity was initially enhanced in the presence of magnetic fields, then it would suddenly fall off.
It doesn't matter whether you can or cannot achieve high temperature superconductivity or fuel cells, they will always be on the list because if you could achieve them they would be extremely valuable.
Modern low temperature physics began with the liquefaction of helium by Kamerlingh Onnes and the discovery of superconductivity at the University of Leiden in the early part of the 20th century.
CĂRȚI ÎN ENGLEZĂ ÎN LEGĂTURĂ CU «SUPERCONDUCTIVITY»
Descoperă întrebuințarea
superconductivity în următoarea selecție bibliografică. Cărți în legătură cu
superconductivity și extrase din aceasta pentru a furniza contextul de întrebuințare al acestuia în literatura Engleză.
Graduate text on superconductivity, an area of intense research activity worldwide.
J. B. Ketterson, S. N. Song,
1999
Starting with the discovery of superconductivity over ninety years ago, the book guides the readers through the many years of subsequent exploration, right up to the latest sensational findings.
Vitaliĭ Lazarevich Ginzburg, E. A. Andryushin,
2004
3
Superconductivity: Fundamentals and Applications
The book has been completely revised and thoroughly expanded by Professor Reinhold Kleiner. By dispensing with complicated mathematical derivations, this book is of interest to both science and engineering students.
W. Buckel, Reinhold Kleiner,
2008
4
Superconductivity: Physics and Applications
Includes end of chapter problems and numerous relevant examples Features brief interviews with key researchers in the field A prominent feature of the book is the use of SI units throughout, in contrast to many of the current textbooks on ...
Kristian Fossheim, Asle Sudboe,
2005
This book covers the whole field of superconductivity from both the theoretical and the experimental point of view.
Charles P. Poole Jr., Horacio A. Farach, Richard J. Creswick,
2010
6
Superconductivity: Volume 1: Conventional and Unconventional ...
Reviews the basic physics, theory and advances in superconductivity.
Karl-Heinz Bennemann, John B. Ketterson,
2008
7
Introduction to
Superconductivity
Well known for its accessibility to graduate students and experimental physicists, this volume emphasizes physical arguments and minimizes theoretical formalism.
8
Theory of
Superconductivity
A classic treatment of the field of superconductivity, with original formulas and techniques by a leading theorist in the field.
John Robert Schrieffer,
1999
9
Superconductivity of Metals and Cuprates
The book is designed to be accessible to senior undergraduate students, making it a helpful tool for teaching superconductivity as well as serving as an introduction to those entering the field.
10
Superconductivity Of Metals And Alloys
The microscopic theory is then built up in the Bogolubov language of self-consistent fields. This text provides the classic, fundamental basis for any work in the field of superconductivity.
ȘTIRI NOI CARE INCLUD TERMENUL «SUPERCONDUCTIVITY»
Află ce ziare naționale și internaționale au scris despre și cum este întrebuințat termenul
superconductivity în contextul următoarelor știri.
Public Release: 2-Jun-2015 High-temperature superconductivity in …
This finding not only provides an ideal platform for investigating the mechanism of superconductivity in the two-dimensional system, but also paves the way for ... «EurekAlert, Iun 15»
Linking superconductivity and structure
Superconductivity is a rare physical state in which matter is able to conduct electricity—maintain a flow of electrons—without any resistance. It can only be found ... «Phys.Org, Mai 15»
Visualizing how radiation bombardment boosts superconductivity
The work is a product of the Center for Emergent Superconductivity, a DOE Energy Frontier Research Center established at Brookhaven in partnership with ... «Phys.Org, Mai 15»
Feds Say Temple Professor Shared Superconductivity Secrets With …
The Penn Valley, Pennsylvania resident was working for a company that did research on superconductivity during a sabbatical. He's accused of taking their ... «NBC 10 Philadelphia, Mai 15»
Reported successes and failures aid hot pursuit of superconductivity
A collaboration of researchers in Japan report on four years of extensive research into superconductivity, including the materials that were found not to have ... «Phys.Org, Mai 15»
Electron pairing without superconductivity seen at long last
Electron pairing without superconductivity has been seen for the first time by a team of physicists in the US. Confirming a prediction made in 1969, the electron ... «physicsworld.com, Mai 15»
Researchers discover 'swing-dancing' pairs of electrons, set the …
... Nobel Prize in Physics for the theory of superconductivity. In a superconductor, the motion of paired electrons is highly coordinated, similar to waltzing couples ... «Phys.Org, Mai 15»
Superconductivity Makes Radiation Pressure A Million Times Stronger
Superconductivity is capable of increasing radiation pressure a million times stronger than normal, according to a new discovery. Radiation pressure is the ... «Tech Times, Apr 15»
Superconductivity breakthroughs: Cuprates earn their stripes
The Canadian research community on high-temperature superconductivity continues to lead this exciting scientific field with groundbreaking results coming hot ... «Phys.Org, Mar 15»
A potential Rosetta stone of high temperature superconductivity
Numerical simulation of the magnetic inhomogeneity (red = magnetism, blue = superconductivity) caused by replacing 1% of the indium atoms in a ... «Phys.Org, Mar 15»