Role of TbFe on Perpendicular Magnetic Anisotropy and Giant Magnetoresistance Effect in [Co/Ni]N-Based Spin Valves
Abstract The exchange-coupled [Co/Ni]N/TbFe nano-magnetic films can display strong perpendicular magnetic anisotropy (PMA) which depends on the Tb:Fe component ratio, TbFe layer thickness and the repetition number N of [Co/Ni]N multilayer. Perpendicular spin valves in the nano thickness scale, consi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2014-09-01
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| Series: | Nano-Micro Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40820-014-0009-1 |
| _version_ | 1797362963958464512 |
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| author | Minghong Tang Zongzhi Zhang Yanyan Zhu Bin Ma Qinyuan Jin |
| author_facet | Minghong Tang Zongzhi Zhang Yanyan Zhu Bin Ma Qinyuan Jin |
| author_sort | Minghong Tang |
| collection | DOAJ |
| description | Abstract The exchange-coupled [Co/Ni]N/TbFe nano-magnetic films can display strong perpendicular magnetic anisotropy (PMA) which depends on the Tb:Fe component ratio, TbFe layer thickness and the repetition number N of [Co/Ni]N multilayer. Perpendicular spin valves in the nano thickness scale, consisting of a [Co/Ni]3 free and a [Co/Ni]5/TbFe reference multilayer, show high giant magnetoresistance (GMR) signal of 6.5 % and a large switching field difference over 3 kOe. However, unexpected slanting of the free layer magnetization, accompanied by a reduced GMR ratio, was found to be caused by the presence of a thick Fe-rich or even a thin but Tb-rich TbFe layer. We attribute this phenomenon to the large magnetostriction effect of TbFe which probably induces strong stress acting on the free layer and hence reduces its interfacial PMA. |
| first_indexed | 2024-03-08T16:14:12Z |
| format | Article |
| id | doaj.art-4820c88a597a4e498587093f33e8406c |
| institution | Directory Open Access Journal |
| issn | 2311-6706 2150-5551 |
| language | English |
| last_indexed | 2024-03-08T16:14:12Z |
| publishDate | 2014-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nano-Micro Letters |
| spelling | doaj.art-4820c88a597a4e498587093f33e8406c2024-01-07T12:40:53ZengSpringerOpenNano-Micro Letters2311-67062150-55512014-09-016435936410.1007/s40820-014-0009-1Role of TbFe on Perpendicular Magnetic Anisotropy and Giant Magnetoresistance Effect in [Co/Ni]N-Based Spin ValvesMinghong Tang0Zongzhi Zhang1Yanyan Zhu2Bin Ma3Qinyuan Jin4Department of Optical Science and Engineering, Shanghai Ultra-Precision Optical Engineering Center, Fudan UniversityDepartment of Optical Science and Engineering, Shanghai Ultra-Precision Optical Engineering Center, Fudan UniversityDepartment of Optical Science and Engineering, Shanghai Ultra-Precision Optical Engineering Center, Fudan UniversityDepartment of Optical Science and Engineering, Shanghai Ultra-Precision Optical Engineering Center, Fudan UniversityState Key Laboratory of Precision Spectroscopy and Department of Physics, East China Normal UniversityAbstract The exchange-coupled [Co/Ni]N/TbFe nano-magnetic films can display strong perpendicular magnetic anisotropy (PMA) which depends on the Tb:Fe component ratio, TbFe layer thickness and the repetition number N of [Co/Ni]N multilayer. Perpendicular spin valves in the nano thickness scale, consisting of a [Co/Ni]3 free and a [Co/Ni]5/TbFe reference multilayer, show high giant magnetoresistance (GMR) signal of 6.5 % and a large switching field difference over 3 kOe. However, unexpected slanting of the free layer magnetization, accompanied by a reduced GMR ratio, was found to be caused by the presence of a thick Fe-rich or even a thin but Tb-rich TbFe layer. We attribute this phenomenon to the large magnetostriction effect of TbFe which probably induces strong stress acting on the free layer and hence reduces its interfacial PMA.https://doi.org/10.1007/s40820-014-0009-1Nano magnetic filmsPerpendicular magnetic anisotropySpin valvesTbFe |
| spellingShingle | Minghong Tang Zongzhi Zhang Yanyan Zhu Bin Ma Qinyuan Jin Role of TbFe on Perpendicular Magnetic Anisotropy and Giant Magnetoresistance Effect in [Co/Ni]N-Based Spin Valves Nano-Micro Letters Nano magnetic films Perpendicular magnetic anisotropy Spin valves TbFe |
| title | Role of TbFe on Perpendicular Magnetic Anisotropy and Giant Magnetoresistance Effect in [Co/Ni]N-Based Spin Valves |
| title_full | Role of TbFe on Perpendicular Magnetic Anisotropy and Giant Magnetoresistance Effect in [Co/Ni]N-Based Spin Valves |
| title_fullStr | Role of TbFe on Perpendicular Magnetic Anisotropy and Giant Magnetoresistance Effect in [Co/Ni]N-Based Spin Valves |
| title_full_unstemmed | Role of TbFe on Perpendicular Magnetic Anisotropy and Giant Magnetoresistance Effect in [Co/Ni]N-Based Spin Valves |
| title_short | Role of TbFe on Perpendicular Magnetic Anisotropy and Giant Magnetoresistance Effect in [Co/Ni]N-Based Spin Valves |
| title_sort | role of tbfe on perpendicular magnetic anisotropy and giant magnetoresistance effect in co ni n based spin valves |
| topic | Nano magnetic films Perpendicular magnetic anisotropy Spin valves TbFe |
| url | https://doi.org/10.1007/s40820-014-0009-1 |
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