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eBook details

• Title: Magnetism: Volume I
• Author : George T. Rado
• Release Date : January 01, 1963
• Genre: Physics,Books,Science & Nature,
• Pages : * pages
• Size : 16682 KB

Description

The traditional method of studying paramagnetics, by susceptibility measurements, has been supplemented very considerably over the past decade by the development of the technique of electron spin resonance. Very detailed knowledge is now available about the properties of magnetic ions in a wide variety of lattices (See Orton [1], Bleaney and Stevens [2], Bowers and Owen [3], Griffith [4], and Low [5] for comprehensive reviews). Present developments suggest that before long equally detailed information will be available about interactions between the ions. At the same time that the experimental work was proceeding theoretical studies were also undertaken, and this has led to a detailed and accurate theory of electron spin resonance, which can fairly easily be extended to account for the paramagnetic susceptibilities of the salts. In the course of this work the important concept of a spin Hamiltonian, which first appears in the work of Van Vleck [6] and will be discussed at length, has been developed. It has proved to be of considerable value, for a mass of experimental information can be summed up succinctly in a spin Hamiltonian in just the way that the theoretician finds most acceptable, and the experimentalist reasonably comprehensible! Thus the concept of a spin Hamiltonian is well established in the study of the high temperature properties of ionic salts.

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