This new edition of a vintage updates a lot of the fabric in past variations, together with the 1st bankruptcy, at the background of the sphere. very important ameliorations mirror significant discoveries of the prior a long time. A old standpoint is maintained all through. The reader is drawn into the method of discovery: beginning with a phenomenon, discovering believable causes and competing theories — and at last, the answer. the speculation of magnetism is virtually a metaphor for theoretical physics. the first actual quantum many-body thought (Bethe’s ansatz) was once devised for magnetic chains, simply as mean-field idea used to be invented a century in the past via Weiss to give an explanation for Curie’s legislations. the 1st chapters of this publication are immensely readable, taking us from prehistory to the “spin valves" of the newest prior. subject matters in next chapters contain: angular momenta and spin (Chapter 3), quantum thought of straightforward structures, via more and more technical insights into ordered and random structures, thermal fluctuations, section transitions, chaos etc. modern advancements in nanotechnology now search to exploit the electron’s spin in addition to of its cost. The time isn't really faraway whilst nano-circuits made solely of silicon show such many-body houses as superconductivity or ferromagnetism — with none superconducting fabrics or magnetic ions being current. The reader of this ebook could be ready for such unique twenty-first century purposes. Daniel C Mattis, BS, MS, PhD, Fellow of the yankee actual Society (APS), is a widespread lecturer at examine associations and the writer of a number of textbooks and diverse learn articles. His services comprises many-body thought, electric conductivity, quantum concept of magnetism and such a lot lately, nanotechnology. Prof. Mattis is at the editorial panel for high-temperature superconductivity of the foreign magazine of recent Physics B and smooth Physics Letters B, either released by means of global medical. presently serving as Professor within the Physics division on the collage of Utah in Salt Lake urban, Utah, united states, at a variety of occasions he has been vacationing Professor at Yale collage (New Haven), kingdom college of recent York (Buffalo), Temple collage (Philadelphia), and served as “Wei-Lun traveling Professor" on the chinese language college of Hong Kong. A founding member of the “Few-Body Physics" portion of the APS, he has additionally served as Chair of the status committee of the! APS for the “International Freedom of Scientists."