Microstructural changes induced by lattice instabilities in La2-xBaxCuO4(x=0.125) and Nd2NiO4

C. H. Chen; S. W. Cheong; D. J. Werder; H. Takagi

doi:10.1016/0921-4534(93)90513-P

Microstructural changes induced by lattice instabilities in La_2-xBa_xCuO₄(x=0.125) and Nd₂NiO₄

C. H. Chen, S. W. Cheong, D. J. Werder, H. Takagi

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

We have studied the microstructural changes associated with the structural phase transition from a low temperature orthorhombic phase to a low-temperature tetragonal phase in metallic La_2-xBa_xCuO₄ and insulating Nd₂NiO₄. Employing electron microscopy, diffraction and dark field imaging the transition was found to be similar in both systems. Below the transition temperature a fine mixture exists of both tetragonal and orthorhombic domains. Details of microstructural changes of defect networks are compound specific. A simple model is also proposed to understand the microstructural changes observed in these two systems.

Original language	English (US)
Pages (from-to)	183-194
Number of pages	12
Journal	Physica C: Superconductivity and its applications
Volume	206
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(93)90513-P
State	Published - Feb 20 1993
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(93)90513-P

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abstract = "We have studied the microstructural changes associated with the structural phase transition from a low temperature orthorhombic phase to a low-temperature tetragonal phase in metallic La2-xBaxCuO4 and insulating Nd2NiO4. Employing electron microscopy, diffraction and dark field imaging the transition was found to be similar in both systems. Below the transition temperature a fine mixture exists of both tetragonal and orthorhombic domains. Details of microstructural changes of defect networks are compound specific. A simple model is also proposed to understand the microstructural changes observed in these two systems.",

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AU - Cheong, S. W.

AU - Werder, D. J.

AU - Takagi, H.

PY - 1993/2/20

Y1 - 1993/2/20

N2 - We have studied the microstructural changes associated with the structural phase transition from a low temperature orthorhombic phase to a low-temperature tetragonal phase in metallic La2-xBaxCuO4 and insulating Nd2NiO4. Employing electron microscopy, diffraction and dark field imaging the transition was found to be similar in both systems. Below the transition temperature a fine mixture exists of both tetragonal and orthorhombic domains. Details of microstructural changes of defect networks are compound specific. A simple model is also proposed to understand the microstructural changes observed in these two systems.

AB - We have studied the microstructural changes associated with the structural phase transition from a low temperature orthorhombic phase to a low-temperature tetragonal phase in metallic La2-xBaxCuO4 and insulating Nd2NiO4. Employing electron microscopy, diffraction and dark field imaging the transition was found to be similar in both systems. Below the transition temperature a fine mixture exists of both tetragonal and orthorhombic domains. Details of microstructural changes of defect networks are compound specific. A simple model is also proposed to understand the microstructural changes observed in these two systems.

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Microstructural changes induced by lattice instabilities in La_2-xBa_xCuO₄(x=0.125) and Nd₂NiO₄

Abstract

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