Ni-Fe magnetic head including 1.5-2% Ta

DETAILED DESCRIPTION Accordingly, it is an object of this invention to provide a magnetic head having a high saturation magnetic flux density and yet be excellent in the abrasion resistance.
The above object is attained in accordance with this invention by the use of a magnetic core made of permalloy comprising a ternary alloy consisting of nickel, iron and tantalum, in which the content of tantalum in the alloy is within a range from about 1.
5% to about 3% preferably 1.
5 to 2% by weight.
This invention further provides a magnetic head using a core made of permalloy comprising a quaternary alloy consisting of nickel, iron, tantalum and niobium, in which the content of tantalum in the alloy is within a range from about 1.
5% to about 3% by weight and niobium is further contained in a slight amount therein.
This invention still further provides a magnetic head using a core made of permalloy comprising a pentanary alloy consisting of nickel, iron, tantalum, niobium and titanium, in which the content of tantalum in the alloy is within a range from about 1.
5% to about 3% by weight and niobium and titanium are further contained each in a slight amount therein.