Chromium dioxide CrO_{2} belongs to a class of materials called ferromagnetic half-metals. whose peculiar aspect is that they act as a metal in one spin orientation and as a semiconductor or insulator in the opposite one. Despite numerous experimental and theoretical studies motivated by technologically important applications of this material in spintronics. its fundamental properties... https://www.roneverhart.com/White-to-Blue-BJJ-Training-2-DVD-Set-with-Pedro-Sauer-Preowned/