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| Magnetic property and interlayer segregation in spin valve metal multilayers | |
| 作者姓名： | 于广华 李明华 朱逢吾 柴春林 姜宏伟 赖武彦 |
| 作者单位： | YU Guanghua，LI Minghua ZHU FengwuCHAI Chunlin JIANG Hongwei& LAI Wuyan1. Department of Materials Physics，University of Science and Technology Beijing，Beijing 100083，China;2. Institute of Semiconductor，Chinese Academy of |
| 基金项目： | This work was supported by the National Natural Science Foundation of China (Grant No. 19890310) and the Nataral Science Foundation of Beijing (Grant No. 2012011) . |
| 摘 要： | The experimental results show that the exchange coupling field of NiFe/FeMn for Ta/ NiFe/FeMn/Ta multilayers is higher than that for the spin valve multilayers Ta/NiFe/Cu/NiFe/FeMn/ Ta. In order to find out the reason, the composition and chemical states at the surfaces of Ta( 12nm)/ NiFe(7nm), Ta( 12nm)/NiFe(7nm)/Cu(4nm) and Ta( 12nm)/NiFe(7nm)/Cu(3nm)/NiFe(5nm) were studied using the X-ray photoelectron spectroscopy (XPS). The results show that no elements from lower layers float out or segregate to the surface for the first and second samples. However, Cu atoms segregate to the surface of Ta(12nm)/NiFe(7nm)/Cu(3nm)/NiFe(5nm) multilayers, i.e. Cu atoms segregate to the NiFe/FeMn interface for Ta/NiFe/Cu/NiFe/FeMn/Ta multilayers. We believe that the presence of Cu atoms at the interface of NiFe/FeMn is one of the important factors causing the exchange coupling field of Ta/NiFe/FeMn/Ta multilayers to be higher than that of Ta/NiFe/Cu/NiFe/ FeMn/Ta multilayers. |
Magnetic property and interlayer segregation in spin valve metal multilayers |
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| Guanghua Yu, Li Minghua, Zhu Fengwu, Chai Chunlin, Jiang Hongwei and Lai Wuyan.Magnetic property and interlayer segregation in spin valve metal multilayers[J].Science in China(Technological Sciences),2002,45(2):140-145. | |
| Authors: | Guanghua Yu Li Minghua Zhu Fengwu Chai Chunlin Jiang Hongwei and Lai Wuyan |
| Affiliation: | 1. Department of Materials Physics,University of Science and Technology Beijing,Beijing 100083,China 2. Institute of Semiconductor,Chinese Academy of Sciences,Beijing 100083,China 3. Institute of Physics,Chinese Academy of Sciences,Beijing 100080,China |
| Abstract: | The experimental results show that the exchange coupling field of NiFe/FeMn for Ta/ NiFe/FeMn/Ta multilayers is higher than that for the spin valve multilayers Ta/NiFe/Cu/NiFe/FeMn/ Ta. In order to find out the reason, the composition and chemical states at the surfaces of Ta( 12nm)/ NiFe(7nm), Ta( 12nm)/NiFe(7nm)/Cu(4nm) and Ta( 12nm)/NiFe(7nm)/Cu(3nm)/NiFe(5nm) were studied using the X-ray photoelectron spectroscopy (XPS). The results show that no elements from lower layers float out or segregate to the surface for the first and second samples. However, Cu atoms segregate to the surface of Ta(12nm)/NiFe(7nm)/Cu(3nm)/NiFe(5nm) multilayers, i.e. Cu atoms segregate to the NiFe/FeMn interface for Ta/NiFe/Cu/NiFe/FeMn/Ta multilayers. We believe that the presence of Cu atoms at the interface of NiFe/FeMn is one of the important factors causing the exchange coupling field of Ta/NiFe/FeMn/Ta multilayers to be higher than that of Ta/NiFe/Cu/NiFe/ FeMn/Ta multilayers. |
| Keywords: | NiFe/FeMn NiFe/Cu/NiFe/FeMn interlayer segregation exchange coupling field Hex X-ray photoelectron spectroscopy(XPS) |
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