| SPECIAL TOPIC—60th Anniversary of Department of Physics of Nanjing Normal University |
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Temperature-dependent interlayer exchange coupling strength in synthetic antiferromagnetic[Pt/Co]2/Ru/[Co/Pt]4 multilayers |
| Yong Li(李勇)1, Xiangjun Jin(金香君)1, Pengfei Pan(潘鹏飞)1, Fu Nan Tan2, Wen Siang Lew2, Fusheng Ma(马付胜)1 |
1 Center for Quantum Transport and Thermal Energy Science, Magnetoelectronic Laboratory, School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China;
2 School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore |
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Abstract In this work, we experimentally investigated the thermal stability of the interlayer exchange coupling field (Hex) and strength (-Jiec) in synthetic antiferromagnetic (SAF) structure of[Pt(0.6)/Co(0.6)]2/Ru(tRu)/[Co(0.6)/Pt(0.6)]4 multilayers with perpendicular anisotropy. Depending on the thickness of the spacing ruthenium (Ru) layer, the observed interlayer exchange coupling can be either ferromagnetic or antiferromagnetic. The Hex were studied by measuring the magnetization hysteresis loops in the temperature range from 100 K to 700 K as well as the theoretical calculation of the -Jiec. It is found that the interlayer coupling in the multilayers is very sensitive to the thickness of Ru and temperature. The Hex exhibits either a linear or a non-linear dependence on the temperature for different thickness of Ru. Furthermore, our SAF multilayers show a high thermal stability even up to 600 K (Hex=3.19 kOe, -Jiec=1.97 erg/cm2 for tRu=0.6 nm, the unit 1 Oe=79.5775 A·m-1), which was higher than the previous studies.
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Received: 30 August 2018
Revised: 04 November 2018
Accepted manuscript online:
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PACS:
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75.50.Ee
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(Antiferromagnetics)
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75.50.Ss
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(Magnetic recording materials)
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75.60.-d
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(Domain effects, magnetization curves, and hysteresis)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11704191), the Jiangsu Specially-Appointed Professor, the Natural Science Foundation of Jiangsu Province of China (Grant No. BK20171026), and the Six-Talent Peaks Project in Jiangsu Province, China (Grant No. XYDXX-038). |
Corresponding Authors:
Fusheng Ma
E-mail: phymafs@njnu.edu.cn
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Cite this article:
Yong Li(李勇), Xiangjun Jin(金香君), Pengfei Pan(潘鹏飞), Fu Nan Tan, Wen Siang Lew, Fusheng Ma(马付胜) Temperature-dependent interlayer exchange coupling strength in synthetic antiferromagnetic[Pt/Co]2/Ru/[Co/Pt]4 multilayers 2018 Chin. Phys. B 27 127502
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