Criteria for saturated magnetization loop

Criteria for saturated magnetization loop.

A. Harres, M. Mikhov, V. Skumryev, A.M.H. de Andrade, J.E. Schmidt, J. Geshev

J. Magn. Magn. Mater.402, 76 (2015)

M(H  ) loops calculated for a disordered system of non-interacting single-domain uniaxial-anisotropy particles using $H_{\max }^{+}/H_{\mathrm{A}}=1.2$, where $H_{\max }^{-}/H_{\mathrm{A}}=-1.2$ (panel (a)) and $H_{\max }^{-}/H_{\mathrm{A}}=-0.8$ (panel (b)). The first (panels (c) and (d)) and the second (panels (e) and (f)) derivatives of the respective descending and ascending branches for negative fields are also given. Although $H_{\max }^{+}/H_{\mathrm{A}}=1.2$ for both loops and their derivatives, only the regions of interest are plotted. The bottom panels show the −m_d(H)$-m_{\mathrm{d}}\left(H\right)$ and m_r(H)$m_{\mathrm{r}}\left(H\right)$ (the latter obtained starting from a random magnetization state) remanence curves; the first derivatives of −m_d(H)$-m_{\mathrm{d}}\left(H\right)$ are plotted in the insets.