Thermal Stability of CoFe/Cu/CoFe/IrMn Top Spin Valve

ZHOU Guang-Hong; WANG Yin-Gang; QI Xian-Jin

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Thermal Stability of CoFe/Cu/CoFe/IrMn Top Spin Valve

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We present a study of thermal stability of the top spin valve with a structure of seed Ta (5nm)/Co75Fe25 (5nm)/Cu (2.5nm)/Co75Fe25n (5nm)/Ir20 Mn80 (12nm)/cap Ta (8nm) deposited at room temperature by magnetron sputtering. A vibrating sample magnetometer fixed with a heater was used to record the magnetic hysteresis loops at variational temperatures and x-ray diffraction was performed to characterize the structure of the multilayer.The exchange field Hex and the coercivity of the pinned CoFe layer Hcp decrease monotonically with increasing temperature.The coercivity of the free CoFe layer Hcf in the spin valve shows a maximum at 498K.The temperature dependences of Hex,Hcp and Hcf have also been discussed.

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《中国物理快报：英文版》 |2009年第3期|249-252|共4页
作者
ZHOU Guang-Hong; WANG Yin-Gang; QI Xian-Jin;
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School of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016;

Department of Mechanical Engineering,Huaiyin Institute of Technology,Huai'an 223003;

School of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016;

School of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016;

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中图分类物理学;
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Thermal Stability of CoFe/Cu/CoFe/IrMn Top Spin Valve

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