[SI-LIST] Re: Effect of Temperature on Metal Conductivity
- From: "Joseph Kochumman" <k.joseph@xxxxxxxxxxxxx>
- To: <DCHOW@xxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Wed, 24 Nov 2004 14:51:11 +0530
Dear Daniel,
Thanks for pointing the error. I jz tried to explain with a simple example
that conductivity increases with decrease in temp... Srry for the confusion.
Rgrds
jozef
----- Original Message -----
From: "Daniel Chow" <DCHOW@xxxxxxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Sent: Tuesday, November 23, 2004 10:34 PM
Subject: [SI-LIST] Re: Effect of Temperature on Metal Conductivity
>
> Hi Joseph,
>
> Be careful not to confuse superconductivity with temperature dependence
> of resistivity!
>
> Resistivity is due to electron-electron collisions, which are
> temperature dependent.
>
> Superconductivity is a effectively a change of physical phase in the
> material. This phase change can be brought about by several ways, one
> of which is temperature. The superconducting phase has many properties,
> one of which is the discontinuous vanishing of electrical resistance.
>
> My point is that these are two separate phenomena, but can easily be
> confused together.
>
> Thanks!
> =20
> Daniel Chow, Ph.D.
> Sr. Product Engineer
> ALTERA
> Office: (408) 544-8100
> Fax: (408) 544-7602
> Email: dchow@xxxxxxxxxx
>
>
> ----- Original Message -----
> From: "Joseph Kochumman" <k.joseph@xxxxxxxxxxxxx>
> Subject: [SI-LIST] Re: Effect of Temperature on Metal Conductivity
> Date: Tue, 23 Nov 2004 10:39:34 +0530
>
> Dear Zhangkun,
>
> In most of the metals resistivity increase with temperature (increase in
> mobility but more collisions).// Phenomenon of superconductivity occurs
> when we decrease the temperature very low. ..
>
> For semiconductors resistivity decreases with temperatrure.. Also the
> same with characteristics of thermistors.
>
> Conductivity is the inverse of resistivity.
>
> Rgrds
> jozef
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