Comparison on the structure and exchange bias in Co/MnPt and MnPt/Co polycrystalline films on glass substrates
Structure and magnetic properties of sputter-prepared Co(5 nm)/MnPt(20 nm) and MnPt/Co polycrystalline films with various annealing temperatures (T) have been compared. XRD and TEM analysis show that MnPt is more compressive in film plane for Co/MnPt than MnPt/Co at as-deposited state. Large HE of 4...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2019-03-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5079890 |
| _version_ | 1819145629261103104 |
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| author | H. W. Chang F. T. Yuan P. Y. Yeh Y. C. Chen Y. L. Lai P. H. Pan C. R. Wang Lance Horng W. C. Chang |
| author_facet | H. W. Chang F. T. Yuan P. Y. Yeh Y. C. Chen Y. L. Lai P. H. Pan C. R. Wang Lance Horng W. C. Chang |
| author_sort | H. W. Chang |
| collection | DOAJ |
| description | Structure and magnetic properties of sputter-prepared Co(5 nm)/MnPt(20 nm) and MnPt/Co polycrystalline films with various annealing temperatures (T) have been compared. XRD and TEM analysis show that MnPt is more compressive in film plane for Co/MnPt than MnPt/Co at as-deposited state. Large HE of 464-560 Oe are attained in two series films through proper thermal process of post annealing and cooling in external magnetic field. The increase of HE with T is mainly dominated by the ordering degree of MnPt layer and the roughness of the interface. As compared to MnPt/Co film (T = 250 °C), Co/MnPt film with more compressive in film plane exhibits L10-ordering, the onset of stress release, and the optimized HE at lower T = 200 °C. Higher HE for MnPt/Co film at T = 250 °C (560 Oe) than Co/MnPt film T = 200 °C (464 Oe) might be related to grain growth for L10 phase. Nevertheless, higher annealing temperature leads to the interdiffusion, the roughened surface and therefore the decrease of HE and Hc. This study provides useful information to fabricate exchange-bias system with L10-MnPt as an antiferromagnetic layer. |
| first_indexed | 2024-12-22T13:01:04Z |
| format | Article |
| id | doaj.art-15a4726e8a85470bbafe41ae803d54cf |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-22T13:01:04Z |
| publishDate | 2019-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-15a4726e8a85470bbafe41ae803d54cf2022-12-21T18:24:59ZengAIP Publishing LLCAIP Advances2158-32262019-03-0193035330035330-510.1063/1.5079890065992ADVComparison on the structure and exchange bias in Co/MnPt and MnPt/Co polycrystalline films on glass substratesH. W. Chang0F. T. Yuan1P. Y. Yeh2Y. C. Chen3Y. L. Lai4P. H. Pan5C. R. Wang6Lance Horng7W. C. Chang8Department of Physics, National Chung Cheng University, Chia-Yi 621, TaiwaniSentek Inc. Advanced Sensor Laboratory, New Taipei City 22101, TaiwanDepartment of Applied Physics, Tunghai University, Taichung 407, TaiwanDepartment of Applied Physics, Tunghai University, Taichung 407, TaiwanDepartment of Applied Physics, Tunghai University, Taichung 407, TaiwanDepartment of Applied Physics, Tunghai University, Taichung 407, TaiwanDepartment of Applied Physics, Tunghai University, Taichung 407, TaiwanDepartment of Physics, National Changhua University of Education, Changhua 500, TaiwanDepartment of Physics, National Chung Cheng University, Chia-Yi 621, TaiwanStructure and magnetic properties of sputter-prepared Co(5 nm)/MnPt(20 nm) and MnPt/Co polycrystalline films with various annealing temperatures (T) have been compared. XRD and TEM analysis show that MnPt is more compressive in film plane for Co/MnPt than MnPt/Co at as-deposited state. Large HE of 464-560 Oe are attained in two series films through proper thermal process of post annealing and cooling in external magnetic field. The increase of HE with T is mainly dominated by the ordering degree of MnPt layer and the roughness of the interface. As compared to MnPt/Co film (T = 250 °C), Co/MnPt film with more compressive in film plane exhibits L10-ordering, the onset of stress release, and the optimized HE at lower T = 200 °C. Higher HE for MnPt/Co film at T = 250 °C (560 Oe) than Co/MnPt film T = 200 °C (464 Oe) might be related to grain growth for L10 phase. Nevertheless, higher annealing temperature leads to the interdiffusion, the roughened surface and therefore the decrease of HE and Hc. This study provides useful information to fabricate exchange-bias system with L10-MnPt as an antiferromagnetic layer.http://dx.doi.org/10.1063/1.5079890 |
| spellingShingle | H. W. Chang F. T. Yuan P. Y. Yeh Y. C. Chen Y. L. Lai P. H. Pan C. R. Wang Lance Horng W. C. Chang Comparison on the structure and exchange bias in Co/MnPt and MnPt/Co polycrystalline films on glass substrates AIP Advances |
| title | Comparison on the structure and exchange bias in Co/MnPt and MnPt/Co polycrystalline films on glass substrates |
| title_full | Comparison on the structure and exchange bias in Co/MnPt and MnPt/Co polycrystalline films on glass substrates |
| title_fullStr | Comparison on the structure and exchange bias in Co/MnPt and MnPt/Co polycrystalline films on glass substrates |
| title_full_unstemmed | Comparison on the structure and exchange bias in Co/MnPt and MnPt/Co polycrystalline films on glass substrates |
| title_short | Comparison on the structure and exchange bias in Co/MnPt and MnPt/Co polycrystalline films on glass substrates |
| title_sort | comparison on the structure and exchange bias in co mnpt and mnpt co polycrystalline films on glass substrates |
| url | http://dx.doi.org/10.1063/1.5079890 |
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