In situ transmission electron microscopy observations of twinning in lanthanum aluminate

Journal Article · Wed Feb 15 00:00:00 EST 1995 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(95)90824-4· OSTI ID:6609596

Norton, M G ^[1]; Biggers, R R ^[2]

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1. Washington State Univ., Pullman, WA (United States). Mechanical and Materials Engineering
2. Air Force Wright Lab., Wright Patterson AFB, OH (United States)

Lanthanum aluminate (LaAlO[sub 3]) has recently become of interest to the superconductor community as a substrate material for growing epitaxial films of YBa[sub 2]Cu[sub 3]O[sub 7] (YBCO). LaAlO[sub 3] has a rhombohedral crystal structure at room temperature and undergoes a transformation to a cubic structure at high temperature. The phase transformation on cooling leads to the formation of twins. This twinning may cause problems in using LaAlO[sub 3] as a substrate. This paper details in-situ observations in the electron microscope of twinning in LaAlO[sub 3] crystals cycled from room temperature to [approximately] 875 C and back.

• OSTI ID: 6609596
• Journal Information: Scripta Metallurgica et Materialia; (United States), Vol. 32:4; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
TWINNING
LANTHANUM OXIDES
CRYSTAL-PHASE TRANSFORMATIONS
EXPERIMENTAL DATA
SAMPLE PREPARATION
SUBSTRATES
SUPERCONDUCTIVITY
TRANSMISSION ELECTRON MICROSCOPY
ALUMINIUM COMPOUNDS
CHALCOGENIDES
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
INFORMATION
LANTHANUM COMPOUNDS
MICROSCOPY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies