NDLI: High-pressure Synthesis and Physical Characterization of Y-based 1222-type Niobio–Cuprate NbSr$_{2}$(Y$_{1.5}$Ce$_{0.5}$)Cu$_{2}$O$

Content Provider	Springer Nature Link
Author	Balamurugan, S. Ubaldini, A. Takayama Muromachi, E. Awana, V. P. S.
Copyright Year	2008
Abstract	We have successfully synthesized a new 1222-type Y-based niobio-cuprate for the first time with the chemical composition, NbSr$_{2}$(Y$_{1.5}$Ce$_{0.5}$)Cu$_{2}$O$_{10}$ by a high-pressure and high-temperature (HPHT) technique under different synthesis conditions. Good quality (nearly single-phase) Nb1222Y polycrystalline sample was synthesized at 1,450$^{ ○}$C and 6 GPa for 2 h. It crystallizes in a tetragonal symmetry of space group I4/mmm with lattice parameters a=b=3.863(2) Å and c=28.687(5) Å, which is isostructural with the corresponding Ru1222Y (RuSr$_{2}$(Y$_{1.5}$Ce$_{0.5}$)Cu$_{2}$O$_{10}$) phase. The dc-magnetic susceptibility measurements show a mixed magnetic state at ∼29 K, which is apparently associated with magneto-superconductivity. The magnetic moment (M) versus field (H) curve of Nb1222Y sample measured at 1.8 K looks like a hybrid and it normally ensembles for both superconducting and a ferromagnetic curve. As the field increases, a low field diamagnetic signal emerges. However, temperature dependence of electrical resistivity of Nb1222Y did not show superconductivity, but semiconducting nature with a relatively large magnetoresistance (∼6% at almost entire region). No specific heat anomaly was observed at the vicinity of the transition temperature.
Starting Page	193
Ending Page	197
Page Count	5
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	21
Issue Number	3
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2008-05-07
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	High-pressure-synthesis Niobio–cuprate Nb1222Y Physical-characterization Characterization and Evaluation of Materials Condensed Matter Magnetism, Magnetic Materials Superconductivity, Superfluidity, Quantum Fluids
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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