Magnetic recording head with high saturation magnetic flux density CoNiFe thin film composition
View Patent ↗A method and system for plating CoNiFe is disclosed. The method and system include providing a plating solution including hydroxymethyl-p-tolylsulfone and plating the CoNiFe film on a substrate in the plating solution. The plating solution is configured to provide a CoNiFe film having a high saturation magnetic flux density and having a composition of 50-70 weight percent of Fe and 3-8 weight percent of Ni. In another aspect, the method and system include plating at least a portion of a first and/or second pole of a write head using the plating solution including hydroxymethyl-p-tolylsulfone and configured to plate the CoNiFe film having a high saturation magnetic flux density and a composition of 50-70 weight percent of Fe and 3-8 weight percent of Ni.
1. A magnetic recording head comprising:
a first pole;
a second pole;
a write coil, at least a portion of the write coil residing between the first pole and the second pole;
a write gap residing between a part of the first pole and a part of the second pole;
wherein at least a portion of at least one of the first pole and the second pole is plated using a plating solution including hydroxymethyl-p-tolylsulfone (HPT), the plating solution being configured to such that the at least the portion includes a CoNiFe film having a high saturation magnetic flux density of greater than 2.2 Tesla and having a composition of 58-62 weight percent of Fe and 3.5-4 weight percent of Ni, the CoNiFe film having a thickness of not more than one micron.
2. The magnetic recording head of claim 1 wherein the CoNiFe film is a soft magnetic film.
3. The magnetic recording head of claim 2 wherein the CoNiFe film has a hard axis coercivity of less than or equal to two Oe and an easy axis coercivity of less than or equal to six Oe.
4. The magnetic recording head of claim 1 wherein the CoNiFe film has a low perpendicular anisotropy field of less than thirty five Oe.
5. The magnetic recording head of claim 1 wherein the CoNiFe film has a low perpendicular anisotropy field of less than twenty Oe.