a magnetic ferrite composition including at least one of mg , ni , cu , zn , mn , and li and having a content of carbon within a predetermined range , for example , over 9 . 7 weight ppm to less than 96 weight ppm . the composition may be used as the magnetic core for an inductor , transformer , coil , etc . used for radios , televisions , communication devices , office automation equipment , switching power sources , and other electronic apparatuses or magnetic heads for video apparatuses or magnetic disk drives or other electronic components .