Head design with low coefficient of thermal expansion insert layer

A method of forming a magnetic read/write head, the method comprising:

• providing a substrate;
• plating a NiFe layer over the substrate;
• annealing the NiFe layer;
• depositing a non-magnetic layer over the NiFe layer;
• and
• producing a magnetic transducer over the non-magnetic layer.

A method of forming a magnetic read/write head, the method comprising:

• providing a substrate with a first coefficient of thermal expansion;
• plating a conductive layer over the substrate;
• annealing the conductive layer, wherein the annealed conductive layer has a second coefficient of thermal expansion that is less than the first coefficient of thermal expansion;
• depositing a non-magnetic layer over the conductive layer;
• and
• fabricating a magnetic transducer over the non-magnetic layer, wherein the magnetic transducer has a third coefficient of thermal expansion that is greater than the first coefficient of thermal expansion.