| Topic: |
Science > Physics |
| User: |
"Sam Wormley" |
| Date: |
25 Aug 2005 11:29:14 PM |
| Object: |
Critical breakthrough |
Critical breakthrough
http://physicsweb.org/articles/news/9/8/17/1
25 August 2005
Strong magnetic fields normally destroy the superconducting properties
of materials. However, physicists in France have now discovered a metal
that becomes a superconductor in the presence of an extremely strong
field (Science 309 1343). The new work is the latest breakthrough in
the growing field of quantum criticality.
Andrew Huxley and colleagues at the CEA laboratory in Grenoble and the
Grenoble High Magnetic Field Laboratory (GHMFL) cooled a sample of
uranium rhenium germanium (URhGe) until it became a superconductor. In
the absence of a magnetic field the superconducting transition
temperature, Tc, was about 280 milliKelvin. As expected Tc became
smaller as the magnetic field was increased to about 2 Tesla, and the
superconducting properties disappeared above this field.
However, when Huxley and co-workers increased the magnetic field to 8
Tesla, the superconducting behaviour returned. Indeed, Tc reached a
value of about 400 milliKelvin before the superconductivity disappeared
again at about 13 Tesla. The Grenoble team also found that URhGe
experiences a phase transition between two different magnetic states at
a field of 12 Tesla.
See: http://physicsweb.org/articles/news/9/8/17/1
.
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| User: "Y.Porat" |
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| Title: Re: Critical breakthrough |
26 Aug 2005 03:14:32 AM |
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Sam Wormley wrote:
Critical breakthrough
http://physicsweb.org/articles/news/9/8/17/1
25 August 2005
Strong magnetic fields normally destroy the superconducting properties
of materials. However, physicists in France have now discovered a metal
that becomes a superconductor in the presence of an extremely strong
field (Science 309 1343). The new work is the latest breakthrough in
the growing field of quantum criticality.
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so ????
any conclusions ??
Y.Porat
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