On the maximum of the field-dependent susceptibility in ferromagnetic materials

摘要: Abstract We propose two new methods to describe the ferromagnetic field-dependent susceptibility within mean-field theory. A parametric approach valid for any value of temperature, applied field, and spin quantum number is developed; this approach, scaling functions magnetization are determined values reduced smaller than 10 −3 . simple analytic derivation also given. As maximum found occur at a relevant variable which order unity, it cannot be accurately described by series expansions function. nonlocal parabolic approximant function constructed reproduces its main features exactly. The paper study ferromagnet in long-range forces known dominate. It suggested that analysis tested on examples ‘mean-field’ ferromagnets HoRh 4 B ZrZn 2 whole scheme should regarded as contributing elaboration advantageous procedure determination independent critical exponents, based general avoids painstaking measurements exact Curie temperature.