Magnetic, structural, and Raman characterization ofRBa2Cu2NbO8(R=Pr, La, or Nd)
| Autor: | C. A. Smith, M. Bennahmias, R.N. Shelton, T.J. Goodwin, Peter Klavins, Harry B. Radousky, J.M. Link, J.C. O'Brien |
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| Rok vydání: | 1992 |
| Předmět: | |
| Zdroj: | Physical Review B. 46:11986-11992 |
| ISSN: | 1095-3795 0163-1829 |
| DOI: | 10.1103/physrevb.46.11986 |
| Popis: | ${\mathrm{PrBa}}_{2}$${\mathrm{Cu}}_{2}$${\mathrm{NbO}}_{8}$ (PrBCNO) is an insulator analogous to the ${\mathrm{PrBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7}$ system having a similar structure but with ${\mathrm{NbO}}_{2}$ planes replacing the CuO chains. Single-phase polycrystalline samples of RBCNO have been synthesized with R=La, Pr, or Nd. These materials were characterized using magnetization, thermal gravimetric analysis in different atmospheres, x-ray diffraction, and Raman spectroscopy. The PrBCNO samples show a signature in the magnetization of a magnetic ordering at 12 K. No such magnetic phase transition is observed down to 2 K in ${\mathrm{NdBa}}_{2}$${\mathrm{Cu}}_{2}$${\mathrm{NbO}}_{8}$. |
| Databáze: | OpenAIRE |
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