Takahashi’s theory takes into account the dynamical properties of spin-fluctuations. What does the theory actually mean by dynamical properties of spin-fluctuations ? And what do the parameters Ƞ, TA and T0 signify in this theory?
Spin fluctuation theory of Morya and extended by Takahasi is one of the most complex theory of magnetism and condensed matter. To understand it one has to go through very complex mathematical steps. No one will be able to explain this theory to you in Research Gate by a few sentences. You must study the old papers of Morya, Takahashi. There is a text book of Takahashi from Springer Verlag: Spin fluctuation theory of Itinerant magnetism, Springer Tracts in Physics. You have to go through it. Mind that there are also quite lot of effort to use this theory in the high-Tc superconductivity by Chubukov and others. Have fun in going through these literature.
@Tapan Chatterji: Thanks for the reply. I do agree that the mathematics involved in this theory is quite complex. I Knew about the book you suggested. But I could not went through it properly due to the unavailability of this book. If you have the soft copy of this book may you please provide it to me particularly its first chapter.
No I do not have any copy of this book. The old Moriya's book is out of print and the recent of of Takahashi is very expensive. But they have written many papers and you should go through those. Are you trained as a theoretical condensed matter physicist? If you are experimentalist you will have trouble to go through this literature. In any case you must study the following two papers:
T. Moriya and Y. Takahashi, J. Phys. Soc. Japan 45, 397 (1978).
T. Moriya and Y. Takahashi, J. de Phys. 39, C6-1466 (1978).
@Tapan Chatterji: I am working in experimental condensed matter physics.Thanks again for the reply and providing the relevent literature.
If you are an experimental physicist I would not advise you to go through all these mathematics. Are you working on itinerant magnetic materials? In that case it is nice to know a bit about spin fluctuation theory of course.
yes.my system divulge characteristics of a itinerant ferromagnet. That is why I am interested in that theory.
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