Aggregation of ferromagnetic and paramagnetic atoms at edges of graphenes and graphite

doi:10.1088/1674-1056/20/2/026803

中国物理B ›› 2011, Vol. 20 ›› Issue (2): 26803-026803.doi: 10.1088/1674-1056/20/2/026803

Aggregation of ferromagnetic and paramagnetic atoms at edges of graphenes and graphite

夏晓翔¹, 杨海方¹, 顾长志¹, 孙连峰², 周海青³, 杨怀超³, 邱彩玉³, 刘政³, 余芳³, 胡丽君³

(1)Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (2)National Centre for Nanoscience and Technology, Beijing 100190, China; (3)National Centre for Nanoscience and Technology, Beijing 100190, China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2010-12-27 修回日期:2010-12-27 出版日期:2011-02-15 发布日期:2011-02-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10774032, 90921001 and 50952009).

Aggregation of ferromagnetic and paramagnetic atoms at edges of graphenes and graphite

Zhou Hai-Qing(周海青)^a)c),Yang Huai-Chao(杨怀超)^a)c),Qiu Cai-Yu(邱彩玉)^a)c), Liu Zheng(刘政)^a)c), Yu Fang(余芳)^a)c),Hu Li-Jun(胡丽君)^a)c), Xia Xiao-Xiang(夏晓翔)^b), Yang Hai-Fang(杨海方)^b), Gu Chang-Zhi(顾长志)^b),and Sun Lian-Feng(孙连峰)^a)^†

^a National Centre for Nanoscience and Technology, Beijing 100190, China; ^b Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; ^c Graduate School of the Chinese Academy of Sciences, Beijing 100049, China

Received:2010-12-27 Revised:2010-12-27 Online:2011-02-15 Published:2011-02-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10774032, 90921001 and 50952009).

摘要/Abstract

摘要： In this work we report that when ferromagnetic metals (Fe, Co and Ni) are thermally evaporated onto n-layer graphenes and graphite, a metal nanowire and adjacent nanogaps can be found along the edges regardless of its zigzag or armchair structure. Similar features can also be observed for paramagnetic metals, such as Mn, Al and Pd. Meanwhile, metal nanowires and adjacent nanogaps cannot be found for diamagnetic metals (Au and Ag). An external magnetic field during the evaporation of metals can make these unique features disappear for ferromagnetic and paramagnetic metal; and the morphologies of diamagnetic metal do not change after the application of an external magnetic field. We discuss the possible reasons for these novel and interesting results, which include possible one-dimensional ferromagnets along the edge and edge-related binding energy.

关键词: graphene, edges of graphene, ferromagnetism, magnetic particle inspection

Abstract: In this work we report that when ferromagnetic metals (Fe, Co and Ni) are thermally evaporated onto n-layer graphenes and graphite, a metal nanowire and adjacent nanogaps can be found along the edges regardless of its zigzag or armchair structure. Similar features can also be observed for paramagnetic metals, such as Mn, Al and Pd. Meanwhile, metal nanowires and adjacent nanogaps cannot be found for diamagnetic metals (Au and Ag). An external magnetic field during the evaporation of metals can make these unique features disappear for ferromagnetic and paramagnetic metal; and the morphologies of diamagnetic metal do not change after the application of an external magnetic field. We discuss the possible reasons for these novel and interesting results, which include possible one-dimensional ferromagnets along the edge and edge-related binding energy.

Key words: graphene, edges of graphene, ferromagnetism, magnetic particle inspection

中图分类号: (Surface thermodynamics, surface energies)

68.35.Md

61.48.De (Structure of carbon nanotubes, boron nanotubes, and other related systems) 68.35.Md (Surface thermodynamics, surface energies)

周海青, 杨怀超, 邱彩玉, 刘政, 余芳, 胡丽君, 夏晓翔, 杨海方, 顾长志, 孙连峰. Aggregation of ferromagnetic and paramagnetic atoms at edges of graphenes and graphite[J]. 中国物理B, 2011, 20(2): 26803-026803.

Zhou Hai-Qing(周海青), Yang Huai-Chao(杨怀超), Qiu Cai-Yu(邱彩玉), Liu Zheng(刘政), Yu Fang(余芳), Hu Li-Jun(胡丽君), Xia Xiao-Xiang(夏晓翔), Yang Hai-Fang(杨海方), Gu Chang-Zhi(顾长志), and Sun Lian-Feng(孙连峰) . Aggregation of ferromagnetic and paramagnetic atoms at edges of graphenes and graphite[J]. Chin. Phys. B, 2011, 20(2): 26803-026803.

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Aggregation of ferromagnetic and paramagnetic atoms at edges of graphenes and graphite

Aggregation of ferromagnetic and paramagnetic atoms at edges of graphenes and graphite

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