Temperature effects on morphology and composition of ultrathin heteroepitaxial films: Fe on Ag(100)

被引:10
|
作者
Canepa, M
Cantini, P
Ricciardi, O
Terreni, S
Mattera, L
机构
[1] Univ Genoa, INFM, I-16146 Genoa, Italy
[2] Univ Genoa, Dipartimento Fis, CFSBT, I-16146 Genoa, Italy
关键词
atom-solid scattering and diffraction - elastic; epitaxy; growth; ion bombardment; iron; low energy ion scattering; silver; surface segregation;
D O I
10.1016/S0039-6028(99)00321-0
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We studied the effects of annealing on a 5 ML thick film of iron deposited at 140 K on Ag(100). Surface morphology and elemental composition have been investigated by He scattering and low energy ion scattering spectroscopy. Mild annealing (up to 300-350 K) does not trigger interlayer mixing and is not sufficient to promote a significant improvement of the film order. Annealing-induced segregation of silver at the surface is clearly observed, after slow heating (5 K/min), above 400 K. The surface order neatly improves in the 510-550 K temperature range, while the film is being coated by silver. A close comparison between He scattering and ion spectroscopy measurements after heating up to 550 K and re-cooling at 140 K provides evidence of an annealing stage in which the Fe film is completely wet by silver. Segregation does not represent the equilibrium condition of the system. The experimental results after annealing at high temperatures (T > 650 K) are consistent with a process of Fe precipitation into the bulk of the substrate and after annealing at 700 K the surface becomes structurally and morphologically comparable with the surface of Ag(100) before deposition. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:34 / 45
页数:12
相关论文
共 50 条
  • [1] Temperature effects on morphology and composition of ultrathin heteroepitaxial films: Fe on Ag(100)
    INFM and CFSBT, Dipto. Fis., Univ. Genova, I., Genova, Italy
    Surf Sci, 1 (34-45):
  • [2] Initial growth morphology in a heteroepitaxial system at low temperature: Fe on Ag(100)
    Canepa, M
    Terreni, S
    Cantini, P
    Campora, A
    Mattera, L
    PHYSICAL REVIEW B, 1997, 56 (07): : 4233 - 4242
  • [3] DOMAIN IMAGES OF ULTRATHIN FE FILMS ON AG(100)
    ROBINS, JL
    CELOTTA, RJ
    UNGURIS, J
    PIERCE, DT
    JONKER, BT
    PRINZ, GA
    APPLIED PHYSICS LETTERS, 1988, 52 (22) : 1918 - 1920
  • [4] Morphology and magnetism of ultrathin Fe films on Pd(100)
    Jin, XF
    Barthel, J
    Shen, J
    Manoharan, SS
    Kirschner, J
    PHYSICAL REVIEW B, 1999, 60 (16) : 11809 - 11812
  • [5] EXCHANGE SPLITTING IN ULTRATHIN FE FILMS DEPOSITED ON AG(100)
    VESCOVO, E
    CARBONE, C
    RADER, O
    SOLID STATE COMMUNICATIONS, 1995, 94 (09) : 751 - 755
  • [6] Magnetic anistropy in ultrathin epitaxial Fe/Ag(100) films with overlayers
    Hicken, RJ
    Gray, SJ
    Ercole, A
    Daboo, C
    Freeland, DJ
    Gu, E
    Ahmad, E
    Bland, JAC
    PHYSICAL REVIEW B, 1997, 55 (09): : 5898 - 5907
  • [7] GROWTH OF ULTRATHIN FE FILMS ON CU(100) - MECHANISMS, MORPHOLOGY, AND STABILITY
    STEIGERWALD, DA
    EGELHOFF, WF
    JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1988, 6 (03): : 1995 - 1996
  • [8] FERROMAGNETIC ORDER AT SURFACES OF ULTRATHIN FE(100)/AG(100) AND TB/FE(100)/AG(100) FILMS DETERMINED BY ELECTRON-CAPTURE SPECTROSCOPY
    RAU, C
    XING, G
    JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1989, 7 (03): : 1889 - 1892
  • [9] THICKNESS-DEPENDENT AND TEMPERATURE-DEPENDENT SPIN ANISOTROPY OF ULTRATHIN EPITAXIAL FE FILMS ON AG(100)
    ARAYAPOCHET, J
    BALLENTINE, CA
    ERSKINE, JL
    PHYSICAL REVIEW B, 1988, 38 (11): : 7846 - 7849
  • [10] Annealing effect on morphology and magnetism of ultrathin films of Fe and Ni on Cu(100)
    Shen, J
    Lin, MT
    Giergiel, J
    Schmidthals, C
    Zharnikov, M
    Schneider, CM
    Kirschner, J
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 156 (1-3) : 104 - 106