Dependence of YBa2Cu3O7-x ultrathin film surface morphology on substrate and growth temperature

Takashi Tsurumaki; Shingo Uehara; Masashi Mukaida

doi:10.1143/jjap.35.l978

Dependence of YBa₂Cu₃O_7-x ultrathin film surface morphology on substrate and growth temperature

Takashi Tsurumaki, Shingo Uehara, Masashi Mukaida

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

5 Citations (Scopus)

Abstract

We have studied the influence of substrate matching and growth temperature on the morphology of YBa₂Cu₃O_7-x: ultrathin film. For films grown on SrTiO₃ and NdGaO₃ substrates, we observed a temperature-dependent surface morphology. The film changed from a smooth epitaxial layer at growth temperatures equal to or below 750°C, into one with several unit-cell-high islands at 800°C. It was also found that the density of these islands differs between films on SrTiO₃ and NdGaO₃ substrates. This substrate-dependent island density was interpreted in terms of the Stransky-Krastanov-type film structure model together with an assumed temperature dependence of the epitaxial layer thickness.

Original language	English
Pages (from-to)	L978-L980
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	35
Issue number	8 PART A
DOIs	https://doi.org/10.1143/jjap.35.l978
Publication status	Published - Aug 1 1996
Externally published	Yes

All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy (miscellaneous)
Physics and Astronomy(all)

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abstract = "We have studied the influence of substrate matching and growth temperature on the morphology of YBa2Cu3O7-x: ultrathin film. For films grown on SrTiO3 and NdGaO3 substrates, we observed a temperature-dependent surface morphology. The film changed from a smooth epitaxial layer at growth temperatures equal to or below 750°C, into one with several unit-cell-high islands at 800°C. It was also found that the density of these islands differs between films on SrTiO3 and NdGaO3 substrates. This substrate-dependent island density was interpreted in terms of the Stransky-Krastanov-type film structure model together with an assumed temperature dependence of the epitaxial layer thickness.",

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AU - Tsurumaki, Takashi

AU - Uehara, Shingo

AU - Mukaida, Masashi

PY - 1996/8/1

Y1 - 1996/8/1

N2 - We have studied the influence of substrate matching and growth temperature on the morphology of YBa2Cu3O7-x: ultrathin film. For films grown on SrTiO3 and NdGaO3 substrates, we observed a temperature-dependent surface morphology. The film changed from a smooth epitaxial layer at growth temperatures equal to or below 750°C, into one with several unit-cell-high islands at 800°C. It was also found that the density of these islands differs between films on SrTiO3 and NdGaO3 substrates. This substrate-dependent island density was interpreted in terms of the Stransky-Krastanov-type film structure model together with an assumed temperature dependence of the epitaxial layer thickness.

AB - We have studied the influence of substrate matching and growth temperature on the morphology of YBa2Cu3O7-x: ultrathin film. For films grown on SrTiO3 and NdGaO3 substrates, we observed a temperature-dependent surface morphology. The film changed from a smooth epitaxial layer at growth temperatures equal to or below 750°C, into one with several unit-cell-high islands at 800°C. It was also found that the density of these islands differs between films on SrTiO3 and NdGaO3 substrates. This substrate-dependent island density was interpreted in terms of the Stransky-Krastanov-type film structure model together with an assumed temperature dependence of the epitaxial layer thickness.

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Dependence of YBa₂Cu₃O_7-x ultrathin film surface morphology on substrate and growth temperature

Abstract

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