New aspect of low-temperature phase transitions of La-cuprates

Y. Horibe; Y. Inoue; Y. Koyama

doi:10.1007/BF02765739

New aspect of low-temperature phase transitions of La-cuprates

Y. Horibe^*, Y. Inoue, Y. Koyama

^*Corresponding author for this work

School of Fundamental Science and Engineering

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

3 Citations (Scopus)

Abstract

The change in the microstructure on aging at 12 K below a low-temperature structural phase transition in La_1.5Sr_0.1Nd_0.4CuO₄ has been examined by transmission electron microscopy. From a series of 100 forbidden dark field images obtained in in situ observation, spotty-shape regions with a Pccn/LTT tilt of the CuO₆ octahedron were found to be nucleated and grow inside a LTO domain, accompanying the annihilation of some spotty-shape regions. In addition, there exists a tweed texture in fundamental dark field images, which is due to the macroscopic strain involved in the transition. Because a map of the tweed texture is different from that of the spotty-shape region, the tilt of the octahedron is not always coupled to a proper spontaneous strain.

Original language	English
Pages (from-to)	461-466
Number of pages	6
Journal	Journal of Superconductivity
Volume	10
Issue number	4
DOIs	https://doi.org/10.1007/BF02765739
Publication status	Published - 1997 Aug

Keywords

La-cuprates
Phase transition
Transmission electron microscopy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Physics and Astronomy (miscellaneous)

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10.1007/BF02765739

Cite this

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title = "New aspect of low-temperature phase transitions of La-cuprates",

abstract = "The change in the microstructure on aging at 12 K below a low-temperature structural phase transition in La1.5Sr0.1Nd0.4CuO4 has been examined by transmission electron microscopy. From a series of 100 forbidden dark field images obtained in in situ observation, spotty-shape regions with a Pccn/LTT tilt of the CuO6 octahedron were found to be nucleated and grow inside a LTO domain, accompanying the annihilation of some spotty-shape regions. In addition, there exists a tweed texture in fundamental dark field images, which is due to the macroscopic strain involved in the transition. Because a map of the tweed texture is different from that of the spotty-shape region, the tilt of the octahedron is not always coupled to a proper spontaneous strain.",

keywords = "La-cuprates, Phase transition, Transmission electron microscopy",

author = "Y. Horibe and Y. Inoue and Y. Koyama",

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T1 - New aspect of low-temperature phase transitions of La-cuprates

AU - Horibe, Y.

AU - Inoue, Y.

AU - Koyama, Y.

PY - 1997/8

Y1 - 1997/8

N2 - The change in the microstructure on aging at 12 K below a low-temperature structural phase transition in La1.5Sr0.1Nd0.4CuO4 has been examined by transmission electron microscopy. From a series of 100 forbidden dark field images obtained in in situ observation, spotty-shape regions with a Pccn/LTT tilt of the CuO6 octahedron were found to be nucleated and grow inside a LTO domain, accompanying the annihilation of some spotty-shape regions. In addition, there exists a tweed texture in fundamental dark field images, which is due to the macroscopic strain involved in the transition. Because a map of the tweed texture is different from that of the spotty-shape region, the tilt of the octahedron is not always coupled to a proper spontaneous strain.

AB - The change in the microstructure on aging at 12 K below a low-temperature structural phase transition in La1.5Sr0.1Nd0.4CuO4 has been examined by transmission electron microscopy. From a series of 100 forbidden dark field images obtained in in situ observation, spotty-shape regions with a Pccn/LTT tilt of the CuO6 octahedron were found to be nucleated and grow inside a LTO domain, accompanying the annihilation of some spotty-shape regions. In addition, there exists a tweed texture in fundamental dark field images, which is due to the macroscopic strain involved in the transition. Because a map of the tweed texture is different from that of the spotty-shape region, the tilt of the octahedron is not always coupled to a proper spontaneous strain.

KW - La-cuprates

KW - Phase transition

KW - Transmission electron microscopy

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JF - Journal of Superconductivity and Novel Magnetism

IS - 4

ER -

New aspect of low-temperature phase transitions of La-cuprates

Abstract

Keywords

ASJC Scopus subject areas

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