Effects of MgO Thickness and Roughness on Perpendicular Magnetic Anisotropy in MgO/CoFeB/Ta Multilayers
| Autor: | Yi Liu, Huicai Zhong, Kai-Gui Zhu, Zhengyong Zhu, Tao Yu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Magnetic characteristic Condensed matter physics business.industry Perpendicular magnetic anisotropy General Physics and Astronomy 02 engineering and technology Surface finish 021001 nanoscience & nanotechnology 01 natural sciences Degree (temperature) Barrier layer Optics 0103 physical sciences Perpendicular 0210 nano-technology business Small window |
| Zdroj: | Chinese Physics Letters. 33:107804 |
| ISSN: | 1741-3540 0256-307X |
| DOI: | 10.1088/0256-307x/33/10/107804 |
| Popis: | The dependence of perpendicular magnetic anisotropy (PMA) on the barrier layer MgO thickness in MgO/CoFeB/Ta multilayers is investigated. The results show that the strongest PMA occurs in a small window of about 2–4 nm with the increase of MgO thickness from 1–10 nm. The crystalline degree of MgO and the change of interatomic distance along the out-of-plane direction may be the main reasons for the change of PMA in these multilayers. Moreover, the roughnesses of 2- and 4-nm-thick MgO samples are 3.163 and 1.8 nm, respectively, and both the samples show PMA. These results could be used to tune the magnetic characteristic of the ultra thin CoFeB film for future applications in perpendicular magnetic devices. |
| Databáze: | OpenAIRE |
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