en>Fiachra10003: Repaired link to "More Than You Ever Wanted To Know About Volatility Swaps"

2014-12-08T15:17:38Z

Repaired link to "More Than You Ever Wanted To Know About Volatility Swaps"

en>BattyBot: fixed CS1 errors: dates & General fixes using AWB (9832)

2014-01-02T00:02:52Z

fixed CS1 errors: dates & General fixes using AWB (9832)

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	~~Last week I woke up and realized - I~~'ve been solitary for some time today and following much bullying from buddies I today locate myself opted for internet dating. They assured me that there are lots of pleasant, regular and enjoyable visitors to meet up, therefore here goes the ~~toss!~~<br>~~I try to keep as physically fit as possible being at the~~ [~~http://lukebryantickets.omarfoundation.org tickets for sale~~] ~~fitness center several-times per week. I enjoy my sports and endeavor to play or watch while many a potential. I will frequently at Hawthorn fits being winter. Notice: I have seen~~ the ~~carnage of wrestling matches at stocktake revenue, Supposing that you would contemplated buying an athletics I don't mind.<br>My fam and friends are magnificent and hanging out together at~~ [~~http://browse.Deviantart.com/?q=bar+gigs bar gigs~~] ~~or meals is always vital. As I find that you can not get a decent conversation with~~ the ~~noise~~ [~~http~~:~~//Photobucket.com/images/I+haven%27t I haven't] ever been into night clubs. I also have two really cunning and unquestionably cheeky dogs who are invariably ready to meet fresh folks.<br><br>~~		The '''Curie–Weiss law''' describes the [[magnetic susceptibility]] {{math\| <var>χ</var>}} of a [[ferromagnet]] in the [[paramagnetic]] region above the [[Curie point]]:

	~~my blog~~ [~~http~~://~~okkyunglee~~.~~com luke bryan concerts 2014~~] :: [http://www.~~cinemaudiosociety~~.~~org Luke Bryan Tickets On Sale Dates~~]		:<math>
			\chi = \frac{C}{T - T_{c}}
			</math>

			where {{math\| <var>C</var>}} is a material-specific [[Curie constant]], {{math\| <var>T</var>}} is absolute temperature, measured in [[kelvin]], and {{math\| <var>T<sub>c</sup></var>}} is the [[Curie temperature]], measured in kelvin. The law predicts a singularity in the susceptibility at {{math\| <var>T {{=}} T<sub>c</sup></var>}}. Below this temperature the ferromagnet has a [[spontaneous magnetization]].

			In many materials the Curie–Weiss law fails to describe the susceptibility in the immediate vicinity of the Curie point, since it is based on a [[mean field theory\|mean-field approximation]]. Instead, there is a [[critical behavior]] of the form

			:<math>
			\chi \sim \frac{1}{(T - T_{c})^\gamma}
			</math>

			with the [[critical exponent]] {{math\| <var>γ</var>}}. However, at temperatures {{math\| <var>T ≫ T<sub>c</sup></var>}} the expression of the Curie–Weiss law still holds, but with {{math\| <var>T<sub>c</sup></var>}} replaced by a temperature {{math\| <var>Θ</var>}} that is somewhat higher than the actual Curie temperature. Some authors call {{math\| <var>Θ</var>}} the '''Weiss constant''' to distinguish it from the temperature of the actual Curie point.

			==Curie-Weiss Derivation==

			The Curie-Weiss Law is an adapted version of Curie's Law, which for a paramagnetic material is<ref name=Hall205>{{harvnb\|Hall\|1994\|pp=205–206}}</ref>

			:<math>\chi = \frac{M}{H} =\frac{M \mu_0}{B} =\frac{C}{T} .</math>

			Here µ<sub>0</sub> is the [[permeability of free space]]; ''M'' the [[magnetization]] ([[magnetic moment]] per unit volume), {{math\|''B''{{=}}''µ''<sub>0</sub>''H''}} two measures of the [[magnetic field]], and ''C'' the material-specific [[Curie constant]]:

			:<math>C = \frac{\mu_B^2}{3 k_B}N g^2 J(J+1),</math>
			where {{math\|''k''<sub>B</sub>}} is [[Boltzmann's constant]], {{math\|''N''}} the number of magnetic atoms (or molecules) per unit volume, {{math\|''g''}} the [[Landé g-factor]], {{math\|''μ''<sub>B</sub>}} the [[Bohr magneton]], {{math\|''J''}} the [[angular momentum]] quantum number.<ref name=Levy201>{{harvnb\|Levy\|1968\|pp=201–202}}</ref>

			For the Curie-Weiss Law the total magnetic field is {{math\|''B+λM''}} where {{math\|''λ''}} is the Weiss molecular field constant and then

			:<math>\chi =\frac{M \mu_0}{B}</math> → <math>\frac{M \mu_0}{B+\lambda M} =\frac{C}{T}</math>

			which can be rearranged to get

			:<math>\chi = \frac{C}{T \mu_0-C \lambda}</math>

			which is the Curie-Weiss Law

			:<math>
			\chi = \frac{C}{T - T_{c}}
			</math>
			where the [[Curie Temperature]] {{math\|''T''<sub>C</sub>}} is

			:<math>T_C = \frac{C \lambda }{\mu_0}</math>

			==See also==
			*[[Curie's law]]
			*[[Paramagnetism]]
			*[[Pierre Curie]]
			*[[Pierre-Ernest Weiss]]

			== Notes ==

			{{reflist}}

			==References==
			*{{cite book\|last=Kittel\|first=Charles\|title=Introduction to solid state physics\|year=1996\|publisher=Wiley\|location=New York [u.a.]\|isbn=978-0471111818\|edition=7th}}
			*{{cite book\|last=Hall\|first=J.R. Hook, H.E.\|title=Solid state physics\|year=1994\|publisher=Wiley\|location=Chichester\|isbn=0471928054\|edition=2nd \|ref=harv}}
			*{{cite book\|last=Levy\|first=Robert A\|title=Principles of Solid State Physics\|year=1968\|publisher=Academic Press \|isbn=978-0124457508\|ref=harv}}

			==External links==
			* [http://www.cond-mat.de/events/correl13/manuscripts/pavarini.pdf Magnetism: Models and Mechanisms] in E. Pavarini, E. Koch, and U. Schollwöck: Emergent Phenomena in Correlated Matter, Jülich 2013, ISBN 978-3-89336-884-6

			{{DEFAULTSORT:Curie-Weiss law}}
			<!--Categories-->
			[[Category:Magnetic ordering]]

76.120.181.41: fix link

2012-08-15T18:57:30Z

fix link

New page

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Variance swap - Revision history

en>Fiachra10003: Repaired link to "More Than You Ever Wanted To Know About Volatility Swaps"

en>BattyBot: fixed CS1 errors: dates & General fixes using AWB (9832)

76.120.181.41: fix link