An effect of particle size on the behavior of ferromagnetic materials

作者：Della Torre Edward^*; Bennett Lawrence H; Jin Yi

来源：Journal of Magnetism and Magnetic Materials, 2012, 324(14): 2189-2192.

DOI：10.1016/j.jmmm.2012.02.010

• Entropy
• Chemical potential
• Nanomagnetics

The dependence of magnetic behavior of media upon the particle/grain size is studied here. A model is presented to describe the behavior of nanomagnetic materials as a function of particle size. The model is applied to two types of experiments: (1) the decay rate of the magnetic aftereffect in nanomagnets and (2) the variation of spontaneous magnetization versus temperature. Both of these experiments show a deviation from the behavior of bulk media above a critical temperature.

• 出版日期2012-7