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Manganese silicides are promising candidates for microelectronics and spintronics materials. A good understanding of their growth mechanisms is a crucial step toward their practical applications. In this paper, a Mn film of ～4 monolayer is deposited on a Si(100)-21 surface by molecular beam epitaxy. The solid reaction between the Mn film and the silicon substrate in a temperature range of 250750℃ is studied using scanning tunneling microscopy. At room temperature, the as-deposited Mn atoms do not react with the silicon atoms and the film consists of disordered Mn clusters. When the sample is annealed at a higher temperature than 290℃, the Mn begins to react with the Si and forms small three-dimensional (3D) islands of Mn-rich silicides and silicide islands of dendritic shapes. When the annealing temperature reaches 325℃, small tabular islands, which correspond to MnSi, start to grow on the Si substrate. At an annealing temperature of 525℃, silicide islands with dendritic shapes all disappear; meantime several large tabular islands, which correspond to MnSi1.7, are formed. When the annealing temperature is higher than 600℃, 3D islands and small tabular islands all disappear while large tabular islands remain there. These results demonstrate that the morphology and the structure of the film strongly depend on annealing temperature. The average size (area) of the remaining islands increases with the increase of annealing time. Time dependence of the averaged island area indicates that the growth of the islands follows the diffusion limited Ostwald ripening mechanism.
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Keywords:
- scanning tunneling microscopy /
- manganese silicide /
- solid phase reaction /
- ostwald ripening
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[30] Qiu Y F,Du W H,Wang B 2011 Acta Phys.Sin.60 036801 (in Chinese) [邱云飞,杜文汉,王兵 2011 60 036801]
[31] [32] Yang J J,Du W H 2011 Acta Phys.Sin.60 037301 (in Chinese)[杨景景,杜文汉 2011 60 037301]
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[40] Wang J Z,Jia J F,Xiong Z H,Xue Q K 2008 Phys.Rev.B 78 045424
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[44] Theis W,Bartelt N C,Tromp R M 1995 Phys.Rev.Lett.75 3328
[45] -
[1] Wang J L,Hirai M,Kusaka M,Iwami M 1997 Appl.Surf.Sci.113-114 53
[2] [3] Tanaka M,Zhang Q,Takeguchi M,Furuya K 2003 Surf.Sci.532- 535 946
[4] [5] Lippitz H,Paggel J J,Fumagalli P 2005 Surf.Sci.575 307
[6] Kumar A,Tallarida M,Hansmann M,Starke U,Horn K 2004 J.Phys.D:Appl.Phys.37 1083
[7] [8] [9] Lian Y C,Chen L J 1986 Appl.Phys.Lett.48 359
[10] Hou Q R,Zhao W,Chen Y B,Liang D,Feng X,Zhang H Y,He Y J 2007 Phys.Status Solidi A 204 3429
[11] [12] Hou Q R,Zhao W,Chen Y B,He Y J 2010 Mater.Chem.Phys.121 103
[13] [14] [15] Teichert S,Sarkar D K,Schwendler S,Giesler H,Mogilatenko A,Falke M,Beddies G,Hinneberg H J 2001 Microelectron.Eng.55 227
[16] Teichert S,Schwendler S,Sarkar D K,Mogilatenko A,Falke M,Beddies G,Kleint C,Hinneberg H J 2001 J.Cryst.Growth 227- 228 882
[17] [18] [19] Krause M R,Stollenwerk A J,Licurse M,LaBella V P 2007 Appl.Phys.Lett.91 041903
[20] Wang J L,Su W F,Xu R,Fan Y L,Jiang Z M 2009 J.Raman Spectrosc.40 335
[21] [22] [23] Zou Z Q,Wang H,Wang D,Wang Q K 2007 Appl.Phys.Lett.90 133111
[24] Zou Z Q,Wang D,Sun J J,Liang J M 2010 J.Appl.Phys.107 014302
[25] [26] Wang D,Zou Z Q 2009 Nanotechnology 20 275607
[27] [28] [29] Ren P,Liu Z L,Ye J,Jiang Y,Liu J F,SunY,Xu P S,Sun ZH,Pan Z Y,Yan WS,Wei S Q 2008 Acta Phys.Sin.57 4322 (in Chinese)[任鹏,刘忠良,叶剑,姜泳,刘金锋,孙玉,徐彭寿,孙治湖,潘志云,闫文盛,韦世强 2008 57 4322]
[30] Qiu Y F,Du W H,Wang B 2011 Acta Phys.Sin.60 036801 (in Chinese) [邱云飞,杜文汉,王兵 2011 60 036801]
[31] [32] Yang J J,Du W H 2011 Acta Phys.Sin.60 037301 (in Chinese)[杨景景,杜文汉 2011 60 037301]
[33] [34] Wu H,Hortamani M,Kratzer P,Scheffler M 2004 Phys.Rev.Lett.92 237202
[35] [36] [37] Hortamani M,Wu H,Kratzer P,Scheffler M 2006 Phys.Rev.B 74 205305
[38] [39] Wang D Y,Wu H Y,Chen L J,HeW,Zhan Q F,Cheng Z H,2006 J.Phys.:Condens.Mat.18 6357
[40] Wang J Z,Jia J F,Xiong Z H,Xue Q K 2008 Phys.Rev.B 78 045424
[41] [42] [43] Fitting L,Zeman M C,Yang W C,Nemanich R J 2003 J.Appl.Phys.93 4180
[44] Theis W,Bartelt N C,Tromp R M 1995 Phys.Rev.Lett.75 3328
[45]
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