1940/12/15 by T. Holstein, H. Primakoff · 113 citations
Physics and Astronomy · Engineering · Materials Science · #Magnetic properties of thin films #Characterization and Applications of Magnetic Nanoparticles #Magnetic Properties and Applications
paper · doi:10.1103/physrev.58.1098
In this paper, the variation of the intrinsic domain magnetization of a ferromagnetic with the external magnetic field, is obtained. The basis of the treatment is the exchange interaction model amplified by explicit consideration of the dipole-dipole interaction between the atomic magnets. Approximations appropriate to low temperatures and equivalent to those used by Bloch in his derivation of the T1 law, are introduced. The resultant expression for the intrinsic volume susceptibility decreases slowly with increasing field; at high fields the functional dependence is as the inverse square root of the field. The variation with temperature is linear; at room temperature and for fields of about 4000 gauss, the order of magnitude of the (volume) susceptibility is 10^\ensuremath-4. The results are compared with experiment and satisfactory agreement is found.