A dual capping layer utilized in a magnetoresistive effect sensor
A read head 300 comprises a lower shield S1, an upper shield S2, a sensor stack 350 between the lower and upper shield and a side shield 322 adjacent the sensor stack. The upper shield comprises a bottom magnetic layer 408, a top magnetic layer 405, a nonmagnetic layer 318 disposed on the bottom mag...
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| creator | Koujiro Komagaki Norihiro Okawa |
| description | A read head 300 comprises a lower shield S1, an upper shield S2, a sensor stack 350 between the lower and upper shield and a side shield 322 adjacent the sensor stack. The upper shield comprises a bottom magnetic layer 408, a top magnetic layer 405, a nonmagnetic layer 318 disposed on the bottom magnetic layer and an antiferromagnetic layer 330 on the top magnetic layer. The bottom magnetic layer includes a first magnetic layer 406 and a second magnetic layer 407. The top magnetic layer disposed on the nonmagnetic layer includes a three layer magnetic structure 401, 402 and 403. The top magnetic layer may have a NiFe layer sandwiched between CoFe layers. A dual capping layer 314 including a magnetic layer 312 and a nonmagnetic layer 310 may be formed on a free layer 308 of the sensor stack. The nonmagnetic layer may be a Ta layer less than 1 nm thick. The upper shield with multiple film stack having different film properties enhances bias field generated in the read head sensor. |
| format | Patent |
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| subjects | INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING |
| title | A dual capping layer utilized in a magnetoresistive effect sensor |
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