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Re: resistivity versus temperature



An interesting paper that reports on a similar experiment (in this
case, bombarding pure copper wire at liquid nitrogen temperature with
deuterons then watching the resistivity decrease as the wire is
annealed at an increasing series of temperatures):

Overhauser, Albert W., "Isothermal Annealing Effects in Irradiated
Copper," Phys. Rev. v. 90, p. 393 (1953)


--Tom Metcalf

On Monday, April 14, 2003, at 08:40 PM, Bernard Cleyet wrote:

"Magnetic impurities (e.g. oxygen) scatter things
more effectively than non-magnetic impurities do."

Hence OFHC (oxygen free high conductivity)

A demo. I've wanted to do is measure the change in conductivity of
copper
wire before and after work hardening and the effect of annealing.
Supposedly one may add defects by heating and quenching that I also
want
to try.

bc



"John S. Denker" wrote:

On 04/14/2003 05:44 PM, Wolfgang Rueckner wrote:
I have a couple of introductory physics texts which show graphs of
the resistivity of various common metals as a function of temperature
(from cryogenic temps to very high). They're very nice looking
graphs but, unhappily, the graphs don't agree with each other at all,
nor do they agree with specific numbers I've found in the Handbook of
Physics & Chemistry. And of course the texts don't reference the
sources from which the graphs have been produced. Do any of you know
of a good reference for such data and/or graphs? Thanks in advance

The low-temperature resistivity of something like
"copper" can be almost anything you can imagine,
because it is more sensitive to the impurity
content than to any intrinsic property of the

cut