Extraordinary Nernst-Ettingshausen effect in magnetic granular alloys

The paper concerns а theoretical study of the behavior of the extraordinary Nernst-Ettingshausen effect {ENEE} in magnetic granular alloys. Calculations have been made within the framework of the Zhang-Levi model. The authors consider an asymmetric scattering of spin-polarized electrons on impurities that occurs under the action of а spin-orЬital interaction. It has been shown that in granular alloys with surface scattering playing а significant part, the value of the ENEE coefficient $Q_s^b$ may Ье substantially higher than the ENEE coefficient $Q_s^b$ for а homogeneous ferromagnetic material; moreover, the coefficients $Q_s$ and $Q_s^b$ may have different signs.