Epitaxial yttrium growth mode on BaF2 (111) and CaF2 (111)

被引：9

作者：

Jacob, A ^{[1
]}

Borgschulte, A ^{[1
]}

Schoenes, J ^{[1
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Halbeiterphys & Opt, D-38106 Braunschweig, Germany

来源：

THIN SOLID FILMS | 2002年 / 414卷 / 01期

关键词：

D O I：

10.1016/S0040-6090(02)00441-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The molecular beam epitaxy of yttrium films on BaF2 (111) substrates has been studied. The surface morphology and the crystallinity of the yttrium films were investigated by reflection high energy electron diffraction. The growth of yttrium on BaF2 depends strongly on the surface modification of the substrate. For a substrate temperature of 200 degreesC, epitaxial. films grow in the Stranski-Krastanov mode. However, for a BaF2 substrate temperature of 700 degreesC, which is the optimum growth temperature for the growth of yttrium on CaF2, only polycrystalline films are obtained. By optimizing the growth process, we succeeded growing yttrium films on BaF2 substrates having the same crystallinity as yttrium films grown on CaF2 substrates. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：39 / 42

页数：4

共 18 条

[1] Bulk and surface processes in low-energy-electron-induced decomposition of CaF2 [J].

Bennewitz, R ;

Smith, D ;

Reichling, M .

PHYSICAL REVIEW B, 1999, 59 (12) :8237-8246

[2] Alloy formation of Y with Pd investigated by photoemission and electron diffraction [J].

Borgschulte, A ;

Rode, M ;

Jacob, A ;

Schoenes, J .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (03) :1147-1154

[3] Yttrium and lanthanum hydride films with switchable optical properties [J].

Griessen, R ;

Huiberts, JN ;

Kremers, M ;

vanGogh, ATM ;

Koeman, NJ ;

Dekker, JP ;

Notten, PHL .

JOURNAL OF ALLOYS AND COMPOUNDS, 1997, 253 :44-50

[4] Switchable yttrium-hydride mirrors grown on CaF2(111):: A x-ray photoelectron spectroscopy and diffraction study [J].

Hayoz, J ;

Schoenes, J ;

Schlapbach, L ;

Aebi, P .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (08) :3925-3933

[5]

HAYOZ J, 1998, PHYS REV B, V58, P4270

[6] Synthesis of yttriumtrihydride films for ex-situ measurements [J].

Huiberts, JN ;

Rector, JH ;

Wijngaarden, RJ ;

Jetten, S ;

deGroot, D ;

Dam, B ;

Koeman, NJ ;

Griessen, R ;

Hjorvarsson, B ;

Olafsson, S ;

Cho, YS .

JOURNAL OF ALLOYS AND COMPOUNDS, 1996, 239 (02) :158-171

[7] Yttrium and lanthanum hydride films with switchable optical properties [J].

Huiberts, JN ;

Griessen, R ;

Rector, JH ;

Wijngaarden, RJ ;

Dekker, JP ;

deGroot, DG ;

Koeman, NJ .

NATURE, 1996, 380 (6571) :231-234

[8] Ultraviolet photoelectron spectroscopy and photoconductivity of CaF2 [J].

Huisinga, M ;

Reichling, M ;

Matthias, E .

PHYSICAL REVIEW B, 1997, 55 (12) :7600-7605

[9] FORMATION OF A NEW ORDERED STRUCTURE OF CAF2/SI(111) BY ULTRAVIOLET-IRRADIATION [J].

KARLSSON, UO ;

HIMPSEL, FJ ;

MORAR, JF ;

MCFEELY, FR ;

RIEGER, D ;

YARMOFF, JA .

PHYSICAL REVIEW LETTERS, 1986, 57 (10) :1247-1250

[10]

KIEREY H, 2001, PHYS REV B, V63

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