Abstract
We have studied the tunneling characteristics of Gd and Al substituted YBa2Cu3O7-δ single crystals with Tc = 90 K and 80 K respectively. The high-Tc superconductos were etched 30 min in a 1% Br solution in methanol and the tunnel barriers were formed by exposing the crystals to the ambient atmosphere for about 30 min. Pb film counterelectrodes were thermally evaporated through a metallic mask. No relevant differences have been found in the differential resistance vs voltage of undoped 90 K and Gd junctions, so confirming that Gd is substituting for Y. A different behavior has been found in the Al doped junctions that show smeared structures of reduced amplitude.
| Original language | English |
|---|---|
| Pages (from-to) | 1743-1744 |
| Number of pages | 2 |
| Journal | Physica B: Physics of Condensed Matter |
| Volume | 194-196 |
| Issue number | PART 2 |
| DOIs | |
| State | Published - 2 Feb 1994 |
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Tunneling spectroscopy into substituted YBaCuO systems. / Cucolo, A. M.; Di Leo, R.; Nigro, A.; Romano, P.; Schneemeyer, Lynn.
In: Physica B: Physics of Condensed Matter, Vol. 194-196, No. PART 2, 02.02.1994, p. 1743-1744.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Tunneling spectroscopy into substituted YBaCuO systems
AU - Cucolo, A. M.
AU - Di Leo, R.
AU - Nigro, A.
AU - Romano, P.
AU - Schneemeyer, Lynn
PY - 1994/2/2
Y1 - 1994/2/2
N2 - We have studied the tunneling characteristics of Gd and Al substituted YBa2Cu3O7-δ single crystals with Tc = 90 K and 80 K respectively. The high-Tc superconductos were etched 30 min in a 1% Br solution in methanol and the tunnel barriers were formed by exposing the crystals to the ambient atmosphere for about 30 min. Pb film counterelectrodes were thermally evaporated through a metallic mask. No relevant differences have been found in the differential resistance vs voltage of undoped 90 K and Gd junctions, so confirming that Gd is substituting for Y. A different behavior has been found in the Al doped junctions that show smeared structures of reduced amplitude.
AB - We have studied the tunneling characteristics of Gd and Al substituted YBa2Cu3O7-δ single crystals with Tc = 90 K and 80 K respectively. The high-Tc superconductos were etched 30 min in a 1% Br solution in methanol and the tunnel barriers were formed by exposing the crystals to the ambient atmosphere for about 30 min. Pb film counterelectrodes were thermally evaporated through a metallic mask. No relevant differences have been found in the differential resistance vs voltage of undoped 90 K and Gd junctions, so confirming that Gd is substituting for Y. A different behavior has been found in the Al doped junctions that show smeared structures of reduced amplitude.
UR - http://www.scopus.com/inward/record.url?scp=18344413168&partnerID=8YFLogxK
U2 - 10.1016/0921-4526(94)91371-4
DO - 10.1016/0921-4526(94)91371-4
M3 - Article
VL - 194-196
SP - 1743
EP - 1744
JO - Physica B: Physics of Condensed Matter
JF - Physica B: Physics of Condensed Matter
SN - 0921-4526
IS - PART 2
ER -