Abstract
Abstract This article discusses the contribution to the specific heat capacity that arises from thermal fluctuations in a magnetically-ordered solid. It considers three temperature ranges, (a) below, (6) in the neighbourhood of, and (c) above Te which is the critical temperature for the existence of the magnetic ordering. For the lowest of these ranges spin-wave theory is applied, and the successes and shortcomings of simple spin-wave dispersion relations and of simple power-law expressions are discussed. Next, more realistic spin-wave dispersion relations, the renormalisation of spin-wave energies, and the properties of low-dimensional magnets are considered. For temperatures around Te the discussion is based on the use of critical exponents. Above Te the magnetic specific heat capacity is related to the magnetic entropy associated with the persistence of short-range magnetic order.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
