The effects of tungsten concentration on crystalline structure and perpendicular magnetic anisotropy of Co-W films
In this study, Co-W thin films deposited by DC magnetron sputtering were demonstrated to be perpendicular magnetic anisotropic with large magnetocrystalline anisotropy energy (MAE). Thermodynamic calculations based on Miedema’s semi-empirical model have been used to estimate the phase in this binary...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2014-12-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4905447 |
| _version_ | 1811267165510172672 |
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| author | S. Q. Yin Y. Wu X. G. Xu H. Wang J.P. Wang Y. Jiang |
| author_facet | S. Q. Yin Y. Wu X. G. Xu H. Wang J.P. Wang Y. Jiang |
| author_sort | S. Q. Yin |
| collection | DOAJ |
| description | In this study, Co-W thin films deposited by DC magnetron sputtering were demonstrated to be perpendicular magnetic anisotropic with large magnetocrystalline anisotropy energy (MAE). Thermodynamic calculations based on Miedema’s semi-empirical model have been used to estimate the phase in this binary alloy system. Based on the thermodynamic calculations results, a series of Co-W thin films were deposited on amorphous Ta underlayer with different tungsten concentrations. According to the X-ray diffraction results, the crystal structure of Co-W thin films is consistent well with that of thermodynamic calculations. Large MAE of Co-W thin films can be obtained with Ku over 2.1 × 105 J/m3 after vacuum annealing. The perpendicular coercivity (Hc) of Co-W thin film reaches 9.1 × 104 A/m. Therefore, the Co-W thin film is considered as a potential choice of high-density magnetic recording media materials. |
| first_indexed | 2024-04-12T20:56:26Z |
| format | Article |
| id | doaj.art-f2b7269643414968bf5210b25337af41 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-12T20:56:26Z |
| publishDate | 2014-12-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-f2b7269643414968bf5210b25337af412022-12-22T03:16:59ZengAIP Publishing LLCAIP Advances2158-32262014-12-01412127156127156-610.1063/1.4905447054412ADVThe effects of tungsten concentration on crystalline structure and perpendicular magnetic anisotropy of Co-W filmsS. Q. Yin0Y. Wu1X. G. Xu2H. Wang3J.P. Wang4Y. Jiang5State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaDepartment of Electrical and Computer Engineering and the Center for Micromagnetics and Information Technologies (MINT), University of Minnesota, Minneapolis, MN 55455, USADepartment of Electrical and Computer Engineering and the Center for Micromagnetics and Information Technologies (MINT), University of Minnesota, Minneapolis, MN 55455, USAState Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaIn this study, Co-W thin films deposited by DC magnetron sputtering were demonstrated to be perpendicular magnetic anisotropic with large magnetocrystalline anisotropy energy (MAE). Thermodynamic calculations based on Miedema’s semi-empirical model have been used to estimate the phase in this binary alloy system. Based on the thermodynamic calculations results, a series of Co-W thin films were deposited on amorphous Ta underlayer with different tungsten concentrations. According to the X-ray diffraction results, the crystal structure of Co-W thin films is consistent well with that of thermodynamic calculations. Large MAE of Co-W thin films can be obtained with Ku over 2.1 × 105 J/m3 after vacuum annealing. The perpendicular coercivity (Hc) of Co-W thin film reaches 9.1 × 104 A/m. Therefore, the Co-W thin film is considered as a potential choice of high-density magnetic recording media materials.http://dx.doi.org/10.1063/1.4905447 |
| spellingShingle | S. Q. Yin Y. Wu X. G. Xu H. Wang J.P. Wang Y. Jiang The effects of tungsten concentration on crystalline structure and perpendicular magnetic anisotropy of Co-W films AIP Advances |
| title | The effects of tungsten concentration on crystalline structure and perpendicular magnetic anisotropy of Co-W films |
| title_full | The effects of tungsten concentration on crystalline structure and perpendicular magnetic anisotropy of Co-W films |
| title_fullStr | The effects of tungsten concentration on crystalline structure and perpendicular magnetic anisotropy of Co-W films |
| title_full_unstemmed | The effects of tungsten concentration on crystalline structure and perpendicular magnetic anisotropy of Co-W films |
| title_short | The effects of tungsten concentration on crystalline structure and perpendicular magnetic anisotropy of Co-W films |
| title_sort | effects of tungsten concentration on crystalline structure and perpendicular magnetic anisotropy of co w films |
| url | http://dx.doi.org/10.1063/1.4905447 |
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