Enhancement of magnetization switching speed in soft ferromagnetic films through control of edge stress anisotropy
First Claim
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1. A method for fabricating a soft ferromagnetic film structure with controlled edge stress anisotropy and enhanced magnetization switching speed, comprising the steps of:
- forming a soft ferromagnetic film structure, said soft ferromagnetic film structure having one or more edges exhibiting edge stress anisotropy; and
forming a non-ferromagnetic film structure along said one or more edges to induce stress contributions therein that control said edge stress anisotropy.
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Abstract
A method for fabricating a soft ferromagnetic film structure with reduced edge stress anisotropy and enhanced magnetization switching speed. A soft ferromagnetic film structure is formed over an underlying structure. The soft ferromagnetic film structure has one or more edges exhibiting edge stress anisotropy. A non-ferromagnetic film structure is formed along the one or more edges to induce stress contributions therein that control the edge stress anisotropy.
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Citations
30 Claims
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1. A method for fabricating a soft ferromagnetic film structure with controlled edge stress anisotropy and enhanced magnetization switching speed, comprising the steps of:
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forming a soft ferromagnetic film structure, said soft ferromagnetic film structure having one or more edges exhibiting edge stress anisotropy; and
forming a non-ferromagnetic film structure along said one or more edges to induce stress contributions therein that control said edge stress anisotropy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A magnetic read/write head transducer, comprising:
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a yoke formed from first and second pole pieces extending from a back gap region thereof to a pole tip region and sandwiching an inductive coil;
said pole pieces each being formed with a magnetic domain-controlled, patterned soft ferromagnetic film structure having enhanced magnetization switching speed;
non-ferromagnetic film structures formed along patterned edges of said soft ferromagnetic film structures, and said non-ferromagnetic film structures being adapted to induce stress contributions in said soft ferromagnetic film structures to control edge stress anisotropy and magnetic domain orientation therein. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A disk drive having a housing, a rotatable magnetic recording medium in the housing, an actuator carrying an actuator arm, a suspension, and a magnetic read/write transducer disposed in adjacent relationship with the recording medium, said transducer comprising:
a yoke formed from first and second pole piece structures sandwiching an inductive coil;
said pole piece structures each including a magnetic domain-controlled, patterned soft ferromagnetic film having enhanced magnetization switching speed;
said pole piece structures each further including non-ferromagnetic material formed along patterned edges of said patterned film; and
said non-ferromagnetic material being adapted to induce stress contributions in said patterned film to control edge stress anisotropy and magnetic domain orientation therein. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
Specification