التفاصيل البيبلوغرافية
| العنوان: |
Spin-valve sensor with an out-of-plane magnetic anisotropy: For small field sensing applications. |
| المؤلفون: |
Lee, Kisu, Park, Moon-Jung, Lee, Seungkyo, Kim, Ju-Young, Cho, B. K. |
| المصدر: |
Journal of Applied Physics; Apr2010, Vol. 107 Issue 7, p073905-073908, 3p, 1 Diagram, 2 Graphs |
| مصطلحات موضوعية: |
PHYSICS research, SEMICONDUCTOR industry, ANISOTROPY, CRYSTALLOGRAPHY, SPIN valves, MAGNETIC devices, THIN films |
| مستخلص: |
This study investigates a spin-valve sensor, which consists of ferromagnetic layers with both an out-of-plane magnetic anisotropy (NiFe/Tb/NiFe layers) and an in-plane magnetic anisotropy (CoFe/IrMn layers). The out-of-plane magnetic anisotropy was able to be tuned by varying the thickness (tTb) of the Tb layer and applying an in-plane magnetic field during film deposition. In addition, the field sensitivity of the spin-valve sensor was also found to be a function of the degree of out-of-plane magnetic anisotropy. As a result, a sensor with tTb=3 nm showed a linear and reversible magnetoresistance (MR) response to an applied in-plane magnetic field with a higher sensitivity of 0.012%/Oe by one order of magnitude than that (∼0.000 75%/Oe) of a sensor with tTb=4 nm. This suggests that the spin-valve sensor can be optimized by changing the Tb thickness so that the magnetic properties of the sensing layer can meet the requirements of a small field sensing application, such as a biosensor. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
