论文信息 - The Dependences of Magnetoresistance and Exchange Biasing on Annealing temperature in Top and Bottom Type Specular Spin Valves with Nano-oxide Layers

The Dependences of Magnetoresistance and Exchange Biasing on Annealing temperature in Top and Bottom Type Specular Spin Valves with Nano-oxide Layers

We investigated magnetoresistance(MR) and exchange bias properties by annealing in top and bosom type spin valves (SV) with nano-oxide layers (NOL). In top SVs with NOL, MR ratio of 9.2% is obtained after postdeposition annealing at 250. In bottom SVs with NOL, MR ratio of 10.1 % is obtained after postdeposition annealing at 250. Therefore, specular reflection of the NOL in bottom SVs is higher than that of the NOL in top SVs. Exchange biasing of bottom SVs with NOL is 28% higher than that of bottom SVs without NOL after annealing. This enhancement of exchange biasing is thought to be due to the reduced magnetic moment of the pinned layer with NOL and enhanced (111) FeMn texture.∌簀؀歯獨慭ሀ鳪떭ꧬ麬駭验

Kwang Youn Kim | T. Kang | S. Jang | Hwi-Seok Kim

[1] Ming Mao,et al. Magnetic properties of specular spin-valves containing nano-oxide layers , 2001 .

[2] J. Kools,et al. Giant magnetoresistance in ion beam deposited spin-valve films with specular enhancement , 2001 .

[3] M. Gillies,et al. Effect of thin oxide layers incorporated in spin valve structures , 2001 .

[4] N. P. Barradas,et al. Magnetoresistance enhancement in specular, bottom-pinned, Mn83Ir17 spin valves with nano-oxide layers , 2000 .

[5] T. C. Anthony,et al. MAGNETORESISTANCE VALUES EXCEEDING 21% IN SYMMETRIC SPIN VALVES , 1995 .

[6] R. Nakatani,et al. Magnetoresistance and Preferred Orientation in Fe–Mn/Ni–Fe/Cu/Ni–Fe Sandwiches with Various Buffer Layer Materials , 1994 .

[7] J. K. Howard,et al. Imaging of the grain‐to‐grain epitaxy in NiFe/FeMn thin‐film couples , 1988 .

[8] Klaus Fuchs,et al. The conductivity of thin metallic films according to the electron theory of metals , 1938, Mathematical Proceedings of the Cambridge Philosophical Society.