Abstract
We systematically synthesized (Hg,W)-1222 cuprates, (Hg,M)Sr2(Ln,Ce)2Cu2Oz under 2 GPa at 1100°C. Single of nearly single-phase compounds are successfully obtained fix M = Ti, V, Cr, Mo, W and Re, and for Ln = Sm-Er. The structure of these compounds belongs to the same family of 1222 phase and is derived from that of (Hg,M)OSr2(Ca,Ln)Cu2Oz by replacing the single (Ca,Ln) layer with a double fluorite (Ln,Ce)2O2 layer. The (Hg0.75W0.25)Sr2(Gd1.5Ce 0.5)Cu2Oz compound crystallizes in a tetragonal lattice with cell parameters a = 3.832, c = 29.150 Å. All synthesized samples, except for the compound with Cr, show bulk superconductivity with large Meissner volume fractions. Tc was found to increase with increasing valence of the cation M and with decreasing ionic radius of Ln. The maximum Tc of 75 K is obtained for (Hg0.75W0.25)Sr2(Gd1.5Ce 0.5)Cu2Oz.
| Original language | English |
|---|---|
| Pages (from-to) | 429-432 |
| Number of pages | 4 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 341-348 |
| Issue number | PART 1 |
| Publication status | Published - 2000 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
Cite this
Superconductivity at 75 K in Hg-1222 cuprates : (Hg,M)Sr2(Ln,Ce)2Cu2Oz (M = Ti, V, Cr, Mo, W, Re; Ln = Sm-Er). / Kandyel, E.; Yamamoto, Ayako; Tajima, S.
In: Physica C: Superconductivity and its Applications, Vol. 341-348, No. PART 1, 2000, p. 429-432.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Superconductivity at 75 K in Hg-1222 cuprates
T2 - (Hg,M)Sr2(Ln,Ce)2Cu2Oz (M = Ti, V, Cr, Mo, W, Re; Ln = Sm-Er)
AU - Kandyel, E.
AU - Yamamoto, Ayako
AU - Tajima, S.
PY - 2000
Y1 - 2000
N2 - We systematically synthesized (Hg,W)-1222 cuprates, (Hg,M)Sr2(Ln,Ce)2Cu2Oz under 2 GPa at 1100°C. Single of nearly single-phase compounds are successfully obtained fix M = Ti, V, Cr, Mo, W and Re, and for Ln = Sm-Er. The structure of these compounds belongs to the same family of 1222 phase and is derived from that of (Hg,M)OSr2(Ca,Ln)Cu2Oz by replacing the single (Ca,Ln) layer with a double fluorite (Ln,Ce)2O2 layer. The (Hg0.75W0.25)Sr2(Gd1.5Ce 0.5)Cu2Oz compound crystallizes in a tetragonal lattice with cell parameters a = 3.832, c = 29.150 Å. All synthesized samples, except for the compound with Cr, show bulk superconductivity with large Meissner volume fractions. Tc was found to increase with increasing valence of the cation M and with decreasing ionic radius of Ln. The maximum Tc of 75 K is obtained for (Hg0.75W0.25)Sr2(Gd1.5Ce 0.5)Cu2Oz.
AB - We systematically synthesized (Hg,W)-1222 cuprates, (Hg,M)Sr2(Ln,Ce)2Cu2Oz under 2 GPa at 1100°C. Single of nearly single-phase compounds are successfully obtained fix M = Ti, V, Cr, Mo, W and Re, and for Ln = Sm-Er. The structure of these compounds belongs to the same family of 1222 phase and is derived from that of (Hg,M)OSr2(Ca,Ln)Cu2Oz by replacing the single (Ca,Ln) layer with a double fluorite (Ln,Ce)2O2 layer. The (Hg0.75W0.25)Sr2(Gd1.5Ce 0.5)Cu2Oz compound crystallizes in a tetragonal lattice with cell parameters a = 3.832, c = 29.150 Å. All synthesized samples, except for the compound with Cr, show bulk superconductivity with large Meissner volume fractions. Tc was found to increase with increasing valence of the cation M and with decreasing ionic radius of Ln. The maximum Tc of 75 K is obtained for (Hg0.75W0.25)Sr2(Gd1.5Ce 0.5)Cu2Oz.
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M3 - Article
VL - 341-348
SP - 429
EP - 432
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - PART 1
ER -