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Chin. Phys. B, 2011, Vol. 20(2): 026803    DOI: 10.1088/1674-1056/20/2/026803
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

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
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.
Keywords:  graphene      edges of graphene      ferromagnetism      magnetic particle inspection  
Received:  27 December 2010      Revised:  27 December 2010      Accepted manuscript online: 
PACS:  68.35.Md (Surface thermodynamics, surface energies)  
  61.48.De (Structure of carbon nanotubes, boron nanotubes, and other related systems)  
  68.35.Md (Surface thermodynamics, surface energies)  
  81.05.Uw  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10774032, 90921001 and 50952009).

Cite this article: 

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 2011 Chin. Phys. B 20 026803

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