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/Martin-000-15SM-15-Series-12-Fret-Acoustic-Guitar-p19001/