Large countable ordinal - Revision history

en>Magioladitis: /* “Unprovable” ordinals */Replace unicode entity nbsp for character [NBSP] (or space) per WP:NBSP + other fixes, replaced: → using AWB (10331)

2014-07-28T12:11:45Z

“Unprovable” ordinals: Replace unicode entity nbsp for character [NBSP] (or space) per WP:NBSP + other fixes, replaced: → using AWB (10331)

← Older revision		Revision as of 14:11, 28 July 2014
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	In [[superconductors]], the '''London penetration depth''' (usually denoted as <math>\lambda</math> or <math>\lambda_L</math>) characterizes the distance to which a [[magnetic field]] penetrates into a superconductor and becomes equal to''' 1/e''' times that of the magnetic field at the surface of the superconductor.<ref name=Kittel8thEd/> Typical values of λ<sub>L</sub> range from 50 to 500 nm.		42 yrs old Customer Support Manager Palmer from Cranberry Portage, has interests for instance beach, [http://ganhedinheironainternet.comoganhardinheiro101.com/ como ganhar dinheiro] na internet and crochet. Previous year very recently completed a trip the Basilica of San Francesco and Other Franciscan Sites.

	~~The London penetration depth results~~ from ~~considering the [[London equations\|London equation]] and [[Ampère's circuital law]].<ref name=Kittel8thEd/> If one considers a superconducting medium occupying ''x''<sub>0</sub>~~, ~~and weak external magnetic field '''B'''<sub>0</sub>> applied along ''z'' <direction in the empty space ''x''<sub>0</sub>~~, ~~then inside the superconductor the magnetic field is given by~~
	:~~<math>B(x)=B_0\exp\left(-\frac{x}{\lambda_L}\right),</math><ref name=Kittel8thEd/>~~
	~~<math>\lambda_L<~~/~~math> can be seen as the distance across in which the magnetic field becomes <math>e<~~/~~math> times weaker~~. ~~The form of <math>\lambda_L</math> is found by this method to be~~
	~~:<math>\lambda_L=\left(\frac{m}{\mu_0 n q^2}\right)^{\frac{1}{2}}</math>,<ref name=Kittel8thEd/>~~
	~~for charge carriers of mass <math>m</math>, number density <math>n</math> and charge <math>q</math>~~.

	~~The penetration depth is determined by the superfluid density, which is an important quantity that determines ''T''<sub>c<~~/sub> in high-temperature superconductors. If some superconductors have some node in their energy gap, the penetration depth at 0 K depends on magnetic field because superfluid density is changed by magnetic field and ~~vice versa~~. ~~So, accurate and precise measurements of the absolute value of penetration depth at 0 K are~~ very ~~important to understand the mechanism of high-temperature superconductivity.~~
	~~London penetration depth can be measured by [[muon spin spectroscopy]] when the superconductor doesn't have an intrinsic magnetic constitution. The penetration depth is directly converted from~~ the ~~depolarization rate of muon spin in relation which~~
	~~''σ''(''T'') is proportional to ''λ''<sup>2</sup>(''T''). The shape~~ of ~~''σ''(''T'') is different with the kind of superconducting energy gap in temperature, so that this immediately indicates the shape of energy gap~~ and ~~gives some clues about the origin of superconductivity to us.~~

	~~==Further reading==~~
	*http://scitation.aip.~~org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000094000012127001000001&idtype=cvips&gifs=yes~~

	~~==References==~~
	~~{{reflist\|refs=~~
	<ref name=Kittel8thEd>{{Cite book \| last = Kittel \| first = Charles \| title = Introduction to Solid State Physics \| publisher = John Wiley & Sons \| year = 2004 \| pages = 273–278 \| isbn = 978-0-471-41526-8}}
	~~</ref>~~
	}}

	~~==See also==~~
	*[[London equations]] 1935
	*[[Ginzburg-Landau theory]] 1950

	~~[[Category:Superconductivity]]~~

69.248.132.69: /* Impredicative ordinals */ Took out information from a questionable source, as discussed in the talk page

2013-12-17T02:03:45Z

Impredicative ordinals: Took out information from a questionable source, as discussed in the talk page

← Older revision		Revision as of 04:03, 17 December 2013
Line 1:		Line 1:
	~~Ed is what people contact me~~ and ~~my wife doesn~~'~~t like it~~ at ~~all~~. ~~To perform lacross~~ is ~~something he would~~ by ~~no means give up~~. ~~North Carolina~~ is ~~exactly where we've been residing~~ for ~~many years~~ and ~~will never move~~. ~~Distributing manufacturing~~ is ~~exactly where my main earnings comes from~~ and it'~~s some thing I truly enjoy~~.<br><br>~~Also visit my website :: psychic phone readings~~ ([http://~~kjhkkb~~.~~net~~/xe/~~notice~~/~~374835 Highly recommended Reading~~])		In [[superconductors]], the '''London penetration depth''' (usually denoted as <math>\lambda</math> or <math>\lambda_L</math>) characterizes the distance to which a [[magnetic field]] penetrates into a superconductor and becomes equal to''' 1/e''' times that of the magnetic field at the surface of the superconductor.<ref name=Kittel8thEd/> Typical values of λ<sub>L</sub> range from 50 to 500 nm.

			The London penetration depth results from considering the [[London equations\|London equation]] and [[Ampère's circuital law]].<ref name=Kittel8thEd/> If one considers a superconducting medium occupying ''x''<sub>0</sub>, and weak external magnetic field '''B'''<sub>0</sub>> applied along ''z'' <direction in the empty space ''x''<sub>0</sub>, then inside the superconductor the magnetic field is given by
			:<math>B(x)=B_0\exp\left(-\frac{x}{\lambda_L}\right),</math><ref name=Kittel8thEd/>
			<math>\lambda_L</math> can be seen as the distance across in which the magnetic field becomes <math>e</math> times weaker. The form of <math>\lambda_L</math> is found by this method to be
			:<math>\lambda_L=\left(\frac{m}{\mu_0 n q^2}\right)^{\frac{1}{2}}</math>,<ref name=Kittel8thEd/>
			for charge carriers of mass <math>m</math>, number density <math>n</math> and charge <math>q</math>.

			The penetration depth is determined by the superfluid density, which is an important quantity that determines ''T''<sub>c</sub> in high-temperature superconductors. If some superconductors have some node in their energy gap, the penetration depth at 0 K depends on magnetic field because superfluid density is changed by magnetic field and vice versa. So, accurate and precise measurements of the absolute value of penetration depth at 0 K are very important to understand the mechanism of high-temperature superconductivity.
			London penetration depth can be measured by [[muon spin spectroscopy]] when the superconductor doesn't have an intrinsic magnetic constitution. The penetration depth is directly converted from the depolarization rate of muon spin in relation which
			''σ''(''T'') is proportional to ''λ''<sup>2</sup>(''T''). The shape of ''σ''(''T'') is different with the kind of superconducting energy gap in temperature, so that this immediately indicates the shape of energy gap and gives some clues about the origin of superconductivity to us.

			==Further reading==
			*http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000094000012127001000001&idtype=cvips&gifs=yes

			==References==
			{{reflist\|refs=
			<ref name=Kittel8thEd>{{Cite book \| last = Kittel \| first = Charles \| title = Introduction to Solid State Physics \| publisher = John Wiley & Sons \| year = 2004 \| pages = 273–278 \| isbn = 978-0-471-41526-8}}
			</ref>
			}}

			==See also==
			*[[London equations]] 1935
			*[[Ginzburg-Landau theory]] 1950

			[[Category:Superconductivity]]

en>Helpful Pixie Bot: ISBNs (Build KE)

2012-05-09T15:44:32Z

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Ed is what people contact me and my wife doesn't like it at all. To perform lacross is something he would by no means give up. North Carolina is exactly where we've been residing for many years and will never move. Distributing manufacturing is exactly where my main earnings comes from and it's some thing I truly enjoy.<br><br>Also visit my website :: psychic phone readings ([http://kjhkkb.net/xe/notice/374835 Highly recommended Reading])