The adsorption process of hydrogen on Gd(0001)

被引：3

作者：

Getzlaff, M

Bode, M

Pascal, R

Wiesendanger, R

机构：

[1] Univ Hamburg, Inst Appl Phys, D-20355 Hamburg, Germany

[2] Univ Hamburg, Microstruct Res Ctr, D-20355 Hamburg, Germany

来源：

APPLIED SURFACE SCIENCE | 1999年 / 142卷 / 1-4期

关键词：

hydrogen; gadolinium; adsorption; photoelectron spectroscopy; scanning tunneling microscopy; scanning tunneling spectroscopy;

D O I：

10.1016/S0169-4332(98)00632-1

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：

The development of the adsorption processes of hydrogen on Gd(0001) was studied by means of photoelectron spectroscopy in combination with scanning tunneling microscopy and spectroscopy, respectively. Due to its high spatial resolution the visualization of the adsorption process is obtained. It was found that the adsorption occurs in two steps. It starts at crystallographic surface imperfections. From these nucleation centers, a domain-like spreading is present which is strongly hindered at surface steps. A short duration high exposure dose results in a different behavior; areas on the surface without imperfections now become affected. These areas with adsorbed hydrogen are not connected to each other. (C) 1999 Elsevier Science B.V. All rights reserved.

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页码：63 / 67

页数：5

相关论文

共 10 条

[1] MAGNETISM AND STRUCTURE OF ULTRATHIN GD FILMS [J].

ASPELMEIER, A ;

GERHARDTER, F ;

BABERSCHKE, K .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1994, 132 (1-3) :22-30

[2] Magnetic exchange splitting of the Gd(0001) surface state studied by variable-temperature scanning tunneling spectroscopy [J].

Bode, M ;

Getzlaff, M ;

Heinze, S ;

Pascal, R ;

Wiesendanger, R .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1998, 66 (Suppl 1) :S121-S124

[3] Temperature-dependent spin polarization of magnetic surface state at Gd(0001) [J].

Donath, M ;

Gubanka, B ;

Passek, F .

PHYSICAL REVIEW LETTERS, 1996, 77 (25) :5138-5141

[4] Temperature-dependent exchange splitting of the magnetic Gd(0 0 0 1) surface state [J].

Getzlaff, M ;

Bode, M ;

Heinze, S ;

Pascal, R ;

Wiesendanger, R .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1998, 184 (02) :155-165

[5] TEMPERATURE-DEPENDENT CONDUCTION-BAND EXCHANGE SPLITTING IN FERROMAGNETIC HCP GADOLINIUM - THEORETICAL PREDICTIONS AND PHOTOEMISSION EXPERIMENTS [J].

KIM, B ;

ANDREWS, AB ;

ERSKINE, JL ;

KIM, KJ ;

HARMON, BN .

PHYSICAL REVIEW LETTERS, 1992, 68 (12) :1931-1934

[6] ALTERING THE GD(0001) SURFACE ELECTRONIC-STRUCTURE WITH HYDROGEN ADSORPTION [J].

LI, DQ ;

ZHANG, JD ;

DOWBEN, PA ;

ONELLION, M .

PHYSICAL REVIEW B, 1993, 48 (08) :5612-5620

[7] SI UNITS IN SURFACE SCIENCE - PROPOSAL FOR REPLACEMENT OF LANGMUIRS AND EXPOSURE [J].

MENZEL, D ;

FUGGIE, JC .

SURFACE SCIENCE, 1978, 74 (01) :321-322

[8] SURFACE MAGNETISM OF GD(0001) - EVIDENCE OF FERROMAGNETIC COUPLING TO BULK [J].

MULHOLLAN, GA ;

GARRISON, K ;

ERSKINE, JL .

PHYSICAL REVIEW LETTERS, 1992, 69 (22) :3240-3243

[9] Relationship between morphology and magnetic behavior for Gd thin films on W(110) [J].

Tober, ED ;

Ynzunza, RX ;

Westphal, C ;

Fadley, CS .

PHYSICAL REVIEW B, 1996, 53 (09) :5444-5448

[10] PREPARATION OF REMANENTLY FERROMAGNETIC GD(0001) [J].

WELLER, D ;

ALVARADO, SF .

JOURNAL OF APPLIED PHYSICS, 1986, 59 (08) :2908-2913