Ferromagnetism in Mechanically Milled KNO₃

Abstract

KNO 3 nano-particles with the diameter of about 28 nm were prepared by mechanical milling using planetary ball mill from the commercial KNO 3 powder. Rotation speeds of ball mill were 0 to 500 rpm, where the milling time was kept at 15 minutes. Magnetization was measured by SQUID magnetometer. The milled sample at 500 rpm showed same order of saturation magnetization as that of BaTiO 3 with vacancies.