A GMR (giant magneto-resistive) spin valve sensor for magnetic recording has been designed in an attempt to solve the Barkhausen noise problem in small-sized GMR sensors. In this study, the GMR ratio of the top-pinned spin valve is optimized to a value of 13.2%. The free layer is magnetized perpendicular to the pinned layer by a CoCrPt permanent magnetic bias so that a linear magnetic field response can be obtained. An obvious improvement on performance is observed when the permanent magnetic bias is magnetized, while the GMR sensor has a steadier MR-H loop and a smaller coercive field.
参考文献
| [1] | Baibich M N,Broto J M,Fert A,et al.Giant magnetoresistance of (001)Fe/(001)Cr magnetic superlattice.Phys Rev Lett,1988,61:2472 |
| [2] | Wallash A.A study of voltage function,noise and magnetic in-stability in spin valve GMR recording heads.IEEE Trans Magn,1998,34(4):1450 |
| [3] | Tsang C H,Fontana R E Jr,Lin T,et al.Design,fabrication,and performance of spin-valve read heads for magnetic recording applications.IBM J Res Dev,1998,42:103 |
| [4] | Lamberton R,Seigler M,Pelhos K,et al.Current-in-plane GMR trilayer head design for hard-disk drives:characterization and extendibility.IEEE Trans Magn,2007,43:645 |
| [5] | Fernandez-Outon L E,Vallejo-Femandez G,Manzoor S,et al.Thermal instabilities in exchange biased materials.Journal of Magnetism and Magnetic Materials,2006,303:296 |
| [6] | Dobrynin A N,Prozorov R.Characteristic temperatures of exchange biased systems.J Appl Phys,2007,102:043902 |
| [7] | Zhu J G,Zheng Y,Liao S.Patterned exchange stabilized spin valve heads at very narrow track width.IEEE Trans Magn,2001,37:1723 |
| [8] | Parkin S S.Dramatic enhancement of interlayer exchange coupling and giant magnetoresistance in Ni81 Fe19/Cu multilayers by addition of thin Co interface layers.Appl Phys Lett,1992,61:1358 |
| [9] | Lee C L,Devasahayam A J,Hu C C,et al.Critical thickness effects of NiFeCr-CoFe seed layers for spin.IEEE Trans Magn,2004,40:2209 |
| [10] | Liu X,Li Z H,Li S T,et al.Preparation of longitudinally oriented CoCrPt thin film in GMR head at room temperature.IEEE Trans Magn,2008,44:2858 |
| [11] | Lu Z Q,Pan G.New domain biasing techniques for nanoscale magneto-electronic devices.Springer Series in Materials Science,2007,94:187 |
| [12] | Tsang C H,Fontana R E,Lin T,et al.Design,fabrication,and performance of spin-valve read heads for magnetic recording applications.IBM Journal of Research and Development,1998,42:103 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%