In-plane Orientation of C-Axis Oriented YBa2Cu3Ox Films on MgO Substrates

Mukaida, Masashi; Takano, Y.; Chiba, Kazuaki; Kusünoki, Masanobu; Ohshima, Shigetoshi

doi:10.1143/jjap.38.1945

Cited by 24 publications

(11 citation statements)

References 6 publications

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“…It can be seen that R 45 tends to increase with increasing d T-S . Mukaida et al reported that in-plane orientations of Y123 films are affected by a balance between ionic adhesion energy and lattice misfit at the interface of film and substrate [14]. An ionic adhesion energy of…”

Section: Resultsmentioning

confidence: 99%

Potential of Nd:YAG pulsed laser deposition method for coated conductor production

Yoshida

Yoshimura

Takai

et al. 2010

Physica C: Superconductivity and its Applications

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Section: Resultsmentioning

confidence: 99%

Potential of Nd:YAG pulsed laser deposition method for coated conductor production

Yoshida

Yoshimura

Takai

et al. 2010

Physica C: Superconductivity and its Applications

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“…These misaligned grains have large-angle grain boundaries, i.e., 45°grain boundaries and cause a higher loss in microwave frequency. 1,3 The reduced temperature T/T c dependence of R s of several films measured at 22 GHz is shown in Fig. 2 As shown in this figure, R s of the films strongly depended on the Ca content.…”

mentioning

confidence: 78%

“…2 The in-plane misalignment is also controllable by deposition temperature. 3 However, strict control of the deposition conditions is needed to reduce R s of the film on the MgO substrate.…”

mentioning

confidence: 99%

Microwave surface resistance of YBa2Cu3Oy films covered by overdoped Y1−xCaxBa2Cu3Oy layers

Obara¹,

Sawa²,

Yamasaki³

et al. 2001

Applied Physics Letters

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We have observed the reduction of the microwave surface resistance Rs of YBa2Cu3Oy films deposited on MgO substrates by covering the films with an overdoped Y1−xCaxBa2Cu3Oy layer. At low temperature, Rs of the YBa2Cu3Oy film covered by an Y1−xCaxBa2Cu3Oy (x=0.2) layer was half that of the single YBa2Cu3Oy film. On the other hand, the single Y1−xCaxBa2Cu3Oy (x=0.2) films did not exhibit low loss characteristics. The diffusion of Ca ions into the YBa2Cu3Oy layer was observed and the selective diffusion of Ca ions to the grain boundaries of the YBa2Cu3Oy layer is considered to be the origin of the low Rs in the covered YBa2Cu3Oy films.

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“…This result indicates that the uniformity of the deposited films influences the electrical properties. The reduction in DT c also shows an improvement of the superconducting properties of YBCO films deposited with the flow guide [22]. Both films deposited without and with the flow guide showed a metallic temperature dependence.…”

Section: Resultsmentioning

confidence: 76%

YBa2Cu3O7?? Thin Films Deposited by MOCVD Vertical Reactor with a Flow Guide

Sujiono

Sani

Saragi

et al. 2001

phys. stat. sol. (a)

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The effect of a flow guide in a vertical MOCVD reactor on the deposition uniformity and growth rate of thin YBCO films has been studied. Without the flow guide the growth rates are low, have a poor uniformity and the film composition is not stoichiometric. The growth rate of the films grown using a reactor with the flow guide was approximately twice that without the flow guide. Using this flow guide the growth rates were 0.4-0.7 mm/h for growth temperatures varying between 600 and 750 C, and the crystalline quality as well as the surface morphology of YBCO films on MgO substrates is improved. For films grown at temperatures above 650 C the composition of Y: Ba : Cu is 1 : 2 : 3, as confirmed by EDAX spectra. Films deposited without and with the flow guide at 700 C have critical temperatures around 85 and 88 K, respectively. The reduction in DT c (T c, zero --T c, onset ) also shows an improvement of the superconducting properties of YBCO thin films deposited with a flow guide.

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In-plane Orientation of C-Axis Oriented YBa₂Cu₃O_x Films on MgO Substrates

Cited by 24 publications

References 6 publications

Potential of Nd:YAG pulsed laser deposition method for coated conductor production

Potential of Nd:YAG pulsed laser deposition method for coated conductor production

Microwave surface resistance of YBa2Cu3Oy films covered by overdoped Y1−xCaxBa2Cu3Oy layers

YBa2Cu3O7?? Thin Films Deposited by MOCVD Vertical Reactor with a Flow Guide

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