Order-disorder phase transition in Au2Fe on Ru(0001)

被引：0

作者：

Marie, J. -B. ^{[1
]}

Bellec, A. ^{[1
]}

Chacon, C. ^{[1
]}

Girard, Y. ^{[1
]}

Lagoute, J. ^{[1
]}

Repain, V. ^{[1
]}

Rousset, S. ^{[1
]}

Garreau, Y. ^{[1
]}

Coati, A. ^{[2
]}

机构：

[1] Univ Paris Diderot Paris 7, UMR CNRS 7162, Lab Mat & Phenomenes Quant, F-75205 Paris 13, France

[2] Synchrotron SOLEIL, Orme des Merisiers, St Aubin Boite Postale 48, F-91192 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 23期

关键词：

SHORT-RANGE ORDER; SURFACE ALLOYS; NANOPARTICLES; MONOLAYER; STABILITY; DIAGRAM; SIZE;

D O I：

10.1103/PhysRevB.94.235440

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Order-disorder transition of the epitaxial surface alloy of bulk immiscible elements Au1-x Fe-x on Ru(0001) is studied using complementary experiments of scanning tunneling microscopy and grazing incidence x-ray diffraction. For x similar or equal to 1/3, we evidence an apparent continuous transition towards disorder with increasing temperature from 550 to 700 K. An ordered Au2Fe two-dimensional alloy is found to be composed of nanometer size domains of the three variants that switch to a two-dimensional solid solution with temperature. A two-levels model is developed to analyze those results which conducts to interpret this phase transition as the result of an order-disorder transition within two dimensional uncorrelated grains, or domains, with nearly fixed size. This system is a good candidate in order to study two-dimensional phase transitions of surface alloy, a largely unexplored domain but crucial to understanding thermal stability of bimetallic nanoparticles.

引用

页数：6

共 50 条

[1] ORDER-DISORDER PHASE TRANSITION IN ALLOY Au3Cd.
Kozlov, E.V.
Starenchenko, S.V.
Physics of Metals and Metallography, 1979, 48 (06): : 82 - 87
[2] Order-disorder transition for corrugated Au layers
Fukutani, Keisuke
Lozova, N.
Zuber, S. M.
Dowben, P. A.
Galiy, P.
Losovyj, Yaroslav B.
APPLIED SURFACE SCIENCE, 2010, 256 (15) : 4796 - 4800
[3] ORDER-DISORDER TRANSITION IN FE-CR SIGMA-PHASE
VILAR, RM
CIZERON, G
JOURNAL OF MATERIALS SCIENCE LETTERS, 1983, 2 (06) : 283 - 284
[4] ORDER-DISORDER PHASE-TRANSITION OF AU(110)-(1X2) RECONSTRUCTION
NGUYEN, HQ
KUK, Y
SILVERMAN, PJ
JOURNAL DE PHYSIQUE, 1988, 49 (C-6): : 269 - 273
[5] Study of order-disorder phase transition in Au4Zn alloy
Starenchenko, SV
Kozlov, EV
FIZIKA METALLOV I METALLOVEDENIE, 1996, 82 (05): : 137 - 141
[6] ORDER-DISORDER PHASE-TRANSITION IN AU4V ALLOY
STARENCHENKO, SV
KUSHNARENKO, VM
KOZLOV, EV
FIZIKA METALLOV I METALLOVEDENIE, 1990, (10): : 142 - 146
[7] PHASE-TRANSITION ORDER-DISORDER IN AU3CD ALLOY
KOZLOV, EV
STARENCHENKO, SV
FIZIKA METALLOV I METALLOVEDENIE, 1979, 48 (06): : 1220 - 1226
[8] ORDER-DISORDER TRANSITION AND MELTING OF AU(110) SURFACES
HOSS, A
NOLD, M
VONBLANCKENHAGEN, P
MEYER, O
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1992, 64 (1-4): : 58 - 63
[9] PHASE-DIAGRAM OF THE ORDER-DISORDER TRANSITION IN NI3FE
VANDEEN, JK
VANDERWOUDE, F
ACTA METALLURGICA, 1981, 29 (07): : 1255 - 1262
[10] THE ORDER-DISORDER PHASE-TRANSITION IN KSCN
BLASCHKO, O
SCHWARZ, W
SCHRANZ, W
FUITH, A
FERROELECTRICS, 1991, 124 (1-4) : 139 - 144

← 1 2 3 4 5 →