Magnetic structure and hysteresis characteristics of Ni$_{49}$Fe$_{18}$Ga$_{27}$Co$_6$ shape memory alloy crystals

The magnetic properties of Ni$_{49}$Fe$_{18}$Ga$_{27}$Co$_6$ shape memory alloy crystals have been studied. The influence of features of the crystal structure on the parameters of magnetic hysteresis is shown. For Ni$_{49}$Fe$_{18}$Ga$_{27}$Co$_6$ alloy, the magnetic state of which is multi-domain, an approach to estimating the hysteresis characteristics is proposed based on a model of magnetostatically interacting single-domain particles with effective spontaneous magnetization.