User:Ag33in

This is Abhijit Guria from T.I.F.R.

I will be working on Curie-Weiss Law http://wiki.riteme.site/wiki/Curie-Weiss_law

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References:

- http://www.gitam.edu/eresource/Engg_Phys/semester_2/magnetic/weiss.htm

- Kittel, Charles. Introduction to solid state physics: Chapter 10: FERROMAGNETISM AND ANTIFERROMAGNETISM

- Weiss, Pierre (1907). "L'hypothèse du champ moléculaire et la propriété ferromagnétique". J. Phys. Theor. Appl. 6 (1): 661–690.

- Feynmann Lectures (Vol 2)

- Ashcroft Mermin

- Vleck: The theory of electric and magnetic susceptibility

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Plan:

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1. Putting summary of the following concepts referred to by the existing page to make the page more self-contained:

- magnetic susceptibility - ferromagnet - paramagnetic region - Curie point - Spontaneous magnetization - Mean field approximation

2. Listing some of the classical approaches to magnetic susceptibility and pointing out their limitation using Bohr–van Leeuwen theorem.

https://wiki.riteme.site/wiki/Bohr%E2%80%93van_Leeuwen_theorem

3. Furnishing the details of the derivation of the Curie Law using the density matrix of a 2-state system and Von Neumann's equation (as done in the class during lecture 5).

http://theory.tifr.res.in/~sgupta/courses/qm2013/hand5.pdf

4. Explanation of para and diamagnetism using perturbation theory:

Solid State physics: Ashcroft Mermin

5. Adding spin-spin interaction in the Hamiltonian: Ising model

http://wiki.riteme.site/wiki/Ising_model

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4 - P3, aqm, particle, nuclear, atomic

3 - P4, QFT1, 2, ST

Distribution of courses in semesters( total 7 )

1-2: 1

2-1: 2

2-2: 2

3-1: 1

3-2: 1