Surface structural chemistry of high Tc superconductors by HREM

W  ZHOU; W Y  LIANG; D A  JEFFERSON

doi:10.1016/0921-4534(94)91622-5

Surface structural chemistry of high Tc superconductors by HREM

W ZHOU, W Y LIANG, D A JEFFERSON

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Abstract

Surface structural chemistry of various high Tc superconductors was investigated by high resolution electron microscopy. Surface decomposition was commonly found on the crystals. However, clean surfaces could be generated by electron beam annealing. The (001) surfaces of all the compounds investigated appeared to be terminated with non-superconducting layers. In HgBa2CuO4+delta, the original (001) surface was found to be covered by disordered BaO and CuO with a 2:1 ratio of Ba:Cu as detected by energy dispersive X-ray microanalysis. This disordered coating recrystallized into Ba2CuO3 microcrystals and became intergrown with the bulk HgBa2CuO4-delta following electron beam irradiation.

Original language	English
Pages (from-to)	795-796
Number of pages	2
Journal	Physica C: Superconductivity
Volume	235-240
Issue number	2
DOIs	https://doi.org/10.1016/0921-4534(94)91622-5
Publication status	Published - Dec 1994

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title = "Surface structural chemistry of high Tc superconductors by HREM",

abstract = "Surface structural chemistry of various high Tc superconductors was investigated by high resolution electron microscopy. Surface decomposition was commonly found on the crystals. However, clean surfaces could be generated by electron beam annealing. The (001) surfaces of all the compounds investigated appeared to be terminated with non-superconducting layers. In HgBa2CuO4+delta, the original (001) surface was found to be covered by disordered BaO and CuO with a 2:1 ratio of Ba:Cu as detected by energy dispersive X-ray microanalysis. This disordered coating recrystallized into Ba2CuO3 microcrystals and became intergrown with the bulk HgBa2CuO4-delta following electron beam irradiation.",

author = "W ZHOU and LIANG, {W Y} and JEFFERSON, {D A}",

year = "1994",

month = dec,

doi = "10.1016/0921-4534(94)91622-5",

language = "English",

volume = "235-240",

pages = "795--796",

journal = "Physica C: Superconductivity",

issn = "0921-4534",

publisher = "Elsevier Science BV",

number = "2",

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T1 - Surface structural chemistry of high Tc superconductors by HREM

AU - ZHOU, W

AU - LIANG, W Y

AU - JEFFERSON, D A

PY - 1994/12

Y1 - 1994/12

N2 - Surface structural chemistry of various high Tc superconductors was investigated by high resolution electron microscopy. Surface decomposition was commonly found on the crystals. However, clean surfaces could be generated by electron beam annealing. The (001) surfaces of all the compounds investigated appeared to be terminated with non-superconducting layers. In HgBa2CuO4+delta, the original (001) surface was found to be covered by disordered BaO and CuO with a 2:1 ratio of Ba:Cu as detected by energy dispersive X-ray microanalysis. This disordered coating recrystallized into Ba2CuO3 microcrystals and became intergrown with the bulk HgBa2CuO4-delta following electron beam irradiation.

AB - Surface structural chemistry of various high Tc superconductors was investigated by high resolution electron microscopy. Surface decomposition was commonly found on the crystals. However, clean surfaces could be generated by electron beam annealing. The (001) surfaces of all the compounds investigated appeared to be terminated with non-superconducting layers. In HgBa2CuO4+delta, the original (001) surface was found to be covered by disordered BaO and CuO with a 2:1 ratio of Ba:Cu as detected by energy dispersive X-ray microanalysis. This disordered coating recrystallized into Ba2CuO3 microcrystals and became intergrown with the bulk HgBa2CuO4-delta following electron beam irradiation.

U2 - 10.1016/0921-4534(94)91622-5

DO - 10.1016/0921-4534(94)91622-5

M3 - Article

SN - 0921-4534

VL - 235-240

SP - 795

EP - 796

JO - Physica C: Superconductivity

JF - Physica C: Superconductivity

IS - 2

ER -

Surface structural chemistry of high Tc superconductors by HREM

Abstract

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