Lab report for superconductors

[tiddwaylll]

Hi, I am doing a lab report for superconductors, and yeah, we have to bake them in a furnace and test their properties and all that.

I am trying to find a nice book, something like an all in one jumble where it talks about the history, the theoretical properties (such as the Meissner effect), crystal structure and all that.

Its perfectly ok if the book is advanced or anything...

Do tell me of any nice book, papers, links you know of..

Thanks so much!

~tiddwaylll

 

[malawi_glenn]

Introduction to Superconductivity by:Michael Tinkham

"This classic text offers the most complete coverage of superconductivity and serves as an important text and reliable reference in the physics community. This text is well-known for its accessibility to graduate students and experimental physicists because it emphasizes physical arguments and minimizes theoretical formalism.
"

Check it out at Amazon

 

[tiddwaylll]

hey, thanks Malawi,

I will be sure to check it out..

:D

 

[malawi_glenn]

And also 6,7 and 8th ed of Kittels "intro to solid state physics" should have info bout it too. And similar books of course.

 

[kaisxuans]

hey i dony know of any books on superconductors but i sure do have some info on the meissner effect!
cheak out my blog
(the one on the left side)
i have the info there

 

[kaisxuans]

but if u can't find it... then nvm
here is some.:
Explanation
The Meissner effect effectively tells us that in a weak applied field, a superconductor expels all magnetic flux. Although the magnetic field is completely expelled from the interior of the superconductor, there is not a sharp transition at the edges of a sample, but rather a rapid decay of field into the sample over a distance called the penetration depth. Each superconductor will have a characteristic penetration depth dependent on the material properties. When a superconductor is cooled in a weak magnetic field and crosses below the transition temperature, persistent currents arise on the surface. They circulate so as to cancel the flux inside (c.f. a current flowing around a loop generates a perpendicular magnetic field - the superconductor does the same to generate a field which opposed the applied field. These persistent currents only flow in a depth equal to the penetration depth.


Perfect Diamagnetism
Superconductors in the Meissner state exhibit perfect diamagnetism, or Superdiamagnetism, such that their magnetic susceptibility is -1. Diamagnetism is defined as the generation of a spontaneous magnetization of a material which directly opposes the direction of an applied field. However, the fundamental origins of the diamagnetism in superconductors and normal materials are very different. In superconductors the diamagnetism arises from the persistent screening currents which flow to oppose the applied field, in normal materials diamagnetism arises as a direct result of an orbital rotation of electrons about the nuclei of an atom induced electromagnetically by the application of an applied field.


Consequences of the Meissner Effect
The discovery of the Meissner effect led to the phenomenological theory of superconductivity by F. and H. London in 1935. They successfully created a theory which explained the resistance less transport and Meissner effect which allowed the first theoretical predictions for superconductivity to be made. However, their theory merely explained experimental observations it did not allow the microscopic origins of the superconducting properties to be identified.


Observing the Meissner Effect
Observation of the Meissner effect is a very difficult experiment, as the applied fields have to be very small (the measurements need to be made a long way from the phase boundary). This is because the penetration depth is temperature dependent and tends to infinity close to the phase boundary.

An online video demonstrating the Meissner effect can be found here:
hope this helps!

 

[malawi_glenn]

From wikipedia.org ... =P

 

[kaisxuans]

yea! u gt it!

 

[malawi_glenn]

In labreports etc, you don't have wikipedia etc as sources :P

 

[kaisxuans]

-.- nvm