Abstract
The microstructure of superconducting Tl2Ba2Ca1Cu2Oχ thin films grown on Au substrates by metal-organic chemical vapor deposition (MOCVD) has been investigated. Characterization techniques included X-ray diffraction, variable temperature magnetization, scanning and transmission electron microscopy (SEM and TEM, respectively) and energy dispersive X-ray spectroscopy (EDX) measurements. The films exhibit a magnetically derived Tc≈80 K and a high degree of texturing with the crystallite c-axis oriented perpendicular to the Au substrate surface as evidenced by enhanced (00l) X-ray diffraction reflections. SEM/ EDX and TEM/EDX provide evidence of Au-Cu alloy formation but no Au diffusion into the film. The superconducting grains exhibit good compositional uniformity and excellent alignment with the substrate, even though the Au substrates were not smooth and exhibited a moderate density of steps.
| Original language | English |
|---|---|
| Pages (from-to) | 97-105 |
| Number of pages | 9 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 210 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - May 15 1993 |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Transmission electron microscopic characterization of metal-organic chemical vapor deposition-derived superconducting Tl2Ba2Ca1Cu2Oχ thin films on Au substrates. Evidence for Au-Cu alloy formation and texturing on a nonplanar metal substrate. / Hu, Jieguang; Miller, Dean J.; Schulz, Douglas L.; Han, Bin; Neumayer, Deborah A.; Hinds, Bruce J.; Marks, Tobin J.
In: Physica C: Superconductivity and its Applications, Vol. 210, No. 1-2, 15.05.1993, p. 97-105.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Transmission electron microscopic characterization of metal-organic chemical vapor deposition-derived superconducting Tl2Ba2Ca1Cu2Oχ thin films on Au substrates. Evidence for Au-Cu alloy formation and texturing on a nonplanar metal substrate
AU - Hu, Jieguang
AU - Miller, Dean J.
AU - Schulz, Douglas L.
AU - Han, Bin
AU - Neumayer, Deborah A.
AU - Hinds, Bruce J.
AU - Marks, Tobin J
PY - 1993/5/15
Y1 - 1993/5/15
N2 - The microstructure of superconducting Tl2Ba2Ca1Cu2Oχ thin films grown on Au substrates by metal-organic chemical vapor deposition (MOCVD) has been investigated. Characterization techniques included X-ray diffraction, variable temperature magnetization, scanning and transmission electron microscopy (SEM and TEM, respectively) and energy dispersive X-ray spectroscopy (EDX) measurements. The films exhibit a magnetically derived Tc≈80 K and a high degree of texturing with the crystallite c-axis oriented perpendicular to the Au substrate surface as evidenced by enhanced (00l) X-ray diffraction reflections. SEM/ EDX and TEM/EDX provide evidence of Au-Cu alloy formation but no Au diffusion into the film. The superconducting grains exhibit good compositional uniformity and excellent alignment with the substrate, even though the Au substrates were not smooth and exhibited a moderate density of steps.
AB - The microstructure of superconducting Tl2Ba2Ca1Cu2Oχ thin films grown on Au substrates by metal-organic chemical vapor deposition (MOCVD) has been investigated. Characterization techniques included X-ray diffraction, variable temperature magnetization, scanning and transmission electron microscopy (SEM and TEM, respectively) and energy dispersive X-ray spectroscopy (EDX) measurements. The films exhibit a magnetically derived Tc≈80 K and a high degree of texturing with the crystallite c-axis oriented perpendicular to the Au substrate surface as evidenced by enhanced (00l) X-ray diffraction reflections. SEM/ EDX and TEM/EDX provide evidence of Au-Cu alloy formation but no Au diffusion into the film. The superconducting grains exhibit good compositional uniformity and excellent alignment with the substrate, even though the Au substrates were not smooth and exhibited a moderate density of steps.
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UR - http://www.scopus.com/inward/citedby.url?scp=0027597025&partnerID=8YFLogxK
U2 - 10.1016/0921-4534(93)90012-F
DO - 10.1016/0921-4534(93)90012-F
M3 - Article
VL - 210
SP - 97
EP - 105
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -