Modulation of magneto-dynamic properties of permalloy/holmium heterostructures with antiferromagnetic coupled interface

被引:3
|
作者
Tian, Mingming [1 ]
Chen, Qian [1 ]
Wong, Ping Kwan Johnny [2 ]
Liu, Ruobai [3 ]
Silly, Fabien [4 ]
Silly, Mathieu G. [5 ]
Ohresser, Philippe [5 ]
You, Biao [3 ]
Du, Jun [3 ]
Wee, Andrew T. S. [6 ,7 ]
Rojas-Sanchez, Juan-Carlos [8 ]
Huang, Zhaocong [1 ]
Zhang, Wen [1 ]
Zhai, Ya [1 ,3 ]
机构
[1] Southeast Univ, Sch Phys, Key Lab Quantum Mat & Devices, Minist Educ, Nanjing 211189, Peoples R China
[2] Northwestern Polytech Univ, Sch Microelect, Xian 710072, Peoples R China
[3] Nanjing Univ, Natl Lab Solid Microstruct, Nanjing 210093, Peoples R China
[4] Univ Paris Saclay, CNRS, CEA, CEA Saclay,SPEC, Gif Sur Yvette F-91191, France
[5] Synchrotron SOLEIL, Lorme Merisiers, St Aubin BP 48, F-91192 Gif Sur Yvette, France
[6] Natl Univ Singapore, Dept Phys, 2 Sci Dr 3, Singapore 117551, Singapore
[7] Natl Univ Singapore, Ctr Adv 2D Mat, 6 Sci Dr 2, Singapore 117546, Singapore
[8] Univ Lorraine, CNRS, UMR 7198, Inst Jean Lamour, Nancy, France
基金
中国国家自然科学基金;
关键词
RAY CIRCULAR-DICHROISM; MAGNETIZATION DYNAMICS; ROOM-TEMPERATURE; SPIN; TRILAYER; TORQUE;
D O I
10.1063/5.0169500
中图分类号
O59 [应用物理学];
学科分类号
摘要
Magneto-dynamics and its interfacial modulation have attracted much attention in energy-efficient and nonvolatile spintronic devices. In particular, the antiferromagnetic coupling at the interface plays a crucial role in spin dynamic behaviors. In this work, we utilize rare-earth holmium (Ho) to interface with transition-metal alloy Ni80Fe20(Py) and achieve a naturally formed antiferromagnetic coupling between Py and interfacial Ho via the magnetic proximity effect, as confirmed by element-specific synchrotron radiation x-ray magnetic circular dichroism hysteresis loops. Importantly, the antiferromagnetic coupled interface is preserved even at a low temperature of 4.2 K, which is below the Curie temperature of Ho. Using ferromagnetic resonance analysis, we reveal that the Gilbert damping and the interfacial spin mixing conductance of the Py/Ho bilayers are much larger than those of the Py/Pt and Py/Pd, suggesting a superior spin transparent efficiency on such an interface with an antiferromagnetic coupling. More importantly, upon the insertion of 2-nm-thick Cu, the antiferromagnetic coupling disappears, associated with the evident suppression of Gilbert damping. This strengthens the critical role of the antiferromagnetic coupled interface in the magneto-dynamics of the transition-metal/rare-earth bilayers and provides a promising way of magneto-dynamics modulation in antiferromagnet-based devices.
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页数:8
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