摘要
用LEED谱,研究了稀土金属表面的振动弛豫。结果表示出,对Sc{0001},原子层间距:d1=2.413±0.001A(收缩8.6%±0.001A)和d2=2.68±0.02A(膨胀1.5%±0.02A)。对Gd{0001},原子层间距:d1=2.80±0.04A(收缩3.1%±0.04A)和d2=2.96±0.03A(膨胀2.4%±0.03A)。对Tb{0001},原子层间距:d1=2.75±0.03A(收缩3.3%±0.03A),d2=2.85±0.01A(膨胀0.18%±0.01A)和d3=2.98±0.03A(膨胀4.7%±0.03A)。对Tb{1120},原子层间距:d1=1.65±0.02A(收缩8.3%±0.02A)和d2=1.80±0.04A(膨胀0.06%±0.04A)
The oscillatory relaxation of the rare earth metal surfaces has been investigated with LEED spectra. The results indicate that the atomic layer distances: df=2. 413 ± 0. 001 A (contracted 8. 6% ± 0. 001 A ), d=2. 68f0. 02A (expanded 1. 5% 1 0. 02 A ) for Sc{ 0001 }; the atomic layer distances: d1= 2. 80 ± 0. 04 A (contracted 3. 1 % ± 0. 04 A ), d2= 2. 96 ±0. 03 A (ex-panded 2. 4 % ± 0. 03 A ) for Gd { 0001 } ; the atomic layer distances;d1= 2. 75 ± 0. 03 A (contracted 3. 3% ± 0. 03 A ), d2= 2. 85±0. 01 A (expanded 0. 18% ± 0. 01 A ), d3=2. 98± 0. 03A (expanded 4. 7% ± 0. 03A ) for Tb { 0001 }; and the atomic layer distances: d1 = 1. 65± 0.02A ) (contracted 8. 3% ±o. 02A ), d2= 1. 80± 0. 04A (expanded 0. 06% ±0. 04A ) for Tb{1120}.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
1994年第3期322-326,共5页
Journal of Atomic and Molecular Physics
关键词
表面
振动弛豫
LEED谱
稀土族
Rare earth metal
Surface oscillatory relaxation
LEED spectra