Angular Dependence of Spin Transfer Switching in Spin Valve Nanopillar Based Heusler Alloy
The spin transfer induced magnetization switching in current perpendicular-to-the-plane spin valve nanopillar based Co2FeAl0.5Si0.5 Heusler alloy with varying the initial angles of the magnetization of sensing layer, θ0, was investigated via macrospin simulations. The effects of an in-plane magnetic...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/2826795 |
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| author | Pirat Khunkitti Anan Kruesubthaworn Arkom Kaewrawang Tim Mewes Claudia K. A. Mewes Apirat Siritaratiwat |
| author_facet | Pirat Khunkitti Anan Kruesubthaworn Arkom Kaewrawang Tim Mewes Claudia K. A. Mewes Apirat Siritaratiwat |
| author_sort | Pirat Khunkitti |
| collection | DOAJ |
| description | The spin transfer induced magnetization switching in current perpendicular-to-the-plane spin valve nanopillar based Co2FeAl0.5Si0.5 Heusler alloy with varying the initial angles of the magnetization of sensing layer, θ0, was investigated via macrospin simulations. The effects of an in-plane magnetic field, Hi, on the switching behavior were also evaluated. The magnetization switching was excited by spin polarized switching current, Is. The time varying magnetization was computed by the Landau-Lifshitz-Gilbert-Slonczewski equation, while the spin transfer induced noise was examined by using the power spectral density analysis. It was found that θ0 should be narrowly initialized since this configuration produces the small noise during the switching. Also, the negative Is produced more uniform switching than the positive Is due to existence of ferromagnetic exchange coupling. When Hi was presented, the noise generated at low frequencies could be suppressed, and then the switching behavior became more uniform. In addition, the results indicated that the noise configuration could be explained by the physical dynamic of magnetization behavior. Hence, the spin transfer induced noise needs to be minimized in order to improve the performance of spin transfer torque random access memory for high density recording. |
| format | Article |
| id | doaj-art-56f37f1640bf423892b057b98f0e765b |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-56f37f1640bf423892b057b98f0e765b2025-02-03T05:50:26ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/28267952826795Angular Dependence of Spin Transfer Switching in Spin Valve Nanopillar Based Heusler AlloyPirat Khunkitti0Anan Kruesubthaworn1Arkom Kaewrawang2Tim Mewes3Claudia K. A. Mewes4Apirat Siritaratiwat5KKU-Seagate Cooperation Research Laboratory, Department of Electrical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, ThailandKKU-Seagate Cooperation Research Laboratory, Department of Electrical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, ThailandKKU-Seagate Cooperation Research Laboratory, Department of Electrical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, ThailandDepartment of Physics and Astronomy, MINT Center, University of Alabama, Tuscaloosa, AL 35487, USADepartment of Physics and Astronomy, MINT Center, University of Alabama, Tuscaloosa, AL 35487, USAKKU-Seagate Cooperation Research Laboratory, Department of Electrical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, ThailandThe spin transfer induced magnetization switching in current perpendicular-to-the-plane spin valve nanopillar based Co2FeAl0.5Si0.5 Heusler alloy with varying the initial angles of the magnetization of sensing layer, θ0, was investigated via macrospin simulations. The effects of an in-plane magnetic field, Hi, on the switching behavior were also evaluated. The magnetization switching was excited by spin polarized switching current, Is. The time varying magnetization was computed by the Landau-Lifshitz-Gilbert-Slonczewski equation, while the spin transfer induced noise was examined by using the power spectral density analysis. It was found that θ0 should be narrowly initialized since this configuration produces the small noise during the switching. Also, the negative Is produced more uniform switching than the positive Is due to existence of ferromagnetic exchange coupling. When Hi was presented, the noise generated at low frequencies could be suppressed, and then the switching behavior became more uniform. In addition, the results indicated that the noise configuration could be explained by the physical dynamic of magnetization behavior. Hence, the spin transfer induced noise needs to be minimized in order to improve the performance of spin transfer torque random access memory for high density recording.http://dx.doi.org/10.1155/2016/2826795 |
| spellingShingle | Pirat Khunkitti Anan Kruesubthaworn Arkom Kaewrawang Tim Mewes Claudia K. A. Mewes Apirat Siritaratiwat Angular Dependence of Spin Transfer Switching in Spin Valve Nanopillar Based Heusler Alloy Advances in Materials Science and Engineering |
| title | Angular Dependence of Spin Transfer Switching in Spin Valve Nanopillar Based Heusler Alloy |
| title_full | Angular Dependence of Spin Transfer Switching in Spin Valve Nanopillar Based Heusler Alloy |
| title_fullStr | Angular Dependence of Spin Transfer Switching in Spin Valve Nanopillar Based Heusler Alloy |
| title_full_unstemmed | Angular Dependence of Spin Transfer Switching in Spin Valve Nanopillar Based Heusler Alloy |
| title_short | Angular Dependence of Spin Transfer Switching in Spin Valve Nanopillar Based Heusler Alloy |
| title_sort | angular dependence of spin transfer switching in spin valve nanopillar based heusler alloy |
| url | http://dx.doi.org/10.1155/2016/2826795 |
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