Published October 1, 2008 | Version v1
Journal article Metadata-only

Electron irradiation-induced phase transformation in α-FeSi2

Creators

  • 1. Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047 (Japan)
  • 2. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Description

Structural changes of α-FeSi2 induced by electron beam irradiation have been investigated using transmission electron microscopy (TEM). Single crystals of Si(111) were implanted with 120 keV Fe ions at -150 deg. C to a fluence of 1.0x1017 /cm2, followed by thermally annealing at 350-550 deg. C. Cross-sectional and plan-view TEM observations revealed the formation of the metastable α-FeSi2 in the annealed samples. Under high-energy electron beam irradiation, the α-phase changed to a metastable crystalline phase whose structure is close to the CsCl structure. The phase transformation was caused mainly by displacement damage processes and suggests a low displacement energy for Fe atoms (<9 eV). To explain these observations, it was considered that vacancies in α-FeSi2 are responsible for the electron irradiation-induced phase transformation

Additional details

Identifiers

DOI
10.1063/1.2986142;

Publishing Information

Journal Title
Journal of Applied Physics
Journal Volume
104
Journal Issue
7
Journal Page Range
p. 073524-073524.6
ISSN
0021-8979
CODEN
JAPIAU

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40056912
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ANNEALING; CESIUM CHLORIDES; ELECTRON BEAMS; EV RANGE 01-10; ION IMPLANTATION; IRON IONS; IRON SILICIDES; IRON-ALPHA; IRRADIATION; KEV RANGE 10-100; MONOCRYSTALS; PHASE TRANSFORMATIONS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0400-1000 K; TRANSMISSION ELECTRON MICROSCOPY; VACANCIES
Descriptors DEC
ALKALI METAL COMPOUNDS; BEAMS; CESIUM COMPOUNDS; CHARGED PARTICLES; CHLORIDES; CHLORINE COMPOUNDS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; CRYSTALS; ELECTRON MICROSCOPY; ELEMENTS; ENERGY RANGE; EV RANGE; HALIDES; HALOGEN COMPOUNDS; HEAT TREATMENTS; IONS; IRON; IRON COMPOUNDS; KEV RANGE; LEPTON BEAMS; METALS; MICROSCOPY; PARTICLE BEAMS; POINT DEFECTS; SILICIDES; SILICON COMPOUNDS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS

Optional Information

Notes
(c) 2008 American Institute of Physics