| Autor: |
Yilmaz, Hasan, Küster, Kathrin, Starke, Ulrich, Clemens, Oliver, Isobe, Masahiko, Puphal, Pascal |
| Předmět: |
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| Zdroj: |
NPJ Quantum Materials; 11/22/2024, Vol. 9 Issue 1, p1-9, 9p |
| Abstrakt: |
The discovery of 80 K superconductivity in bilayer La3Ni2O7 at pressures greater than 14 GPa presents a unique opportunity to study a novel class of high-temperature superconductors. Therefore, other bilayer nickelates following the classical (T4+) Ruddlesden-Popper (RP) series of Sr3Ni2O7 would present an interesting new candidate. In this work, we study the stabilization of RP n = 2 phase in Sr3Ni2−xAlxO7−δ, via floating zone growth of crystals. With powder and single-crystal XRD, we study the stability range of the RP-type phase. Our Thermogravimetric Analysis (TGA), X-ray photoelectron spectroscopy (XPS) and gas extraction studies reveal a remarkably high oxidation state of Ni4+ stabilized by chemical strain from Al. The obtained black crystals are insulating in transport and show a magnetic transition around 12 K. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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