Temperature-dependent infrared refleetivity of ceramic samples of YBa~Cu4Os and substituted YBa2Cu+Os are presented. Substitutions include rare ear'& ions for Y, and part substitutions of Zn for Cu, Ca for Y and La for Ba. It is observed that the phonon near 300 cm "t softens as the temperature is l
Infrared and Raman study of La:YBa2Cu4O8 — An investigation of charge transfer
✍ Scribed by RG Buckley; MP Staines; HJ Trodahl
- Book ID
- 103944917
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 185 KB
- Volume
- 185-189
- Category
- Article
- ISSN
- 0921-4534
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📜 SIMILAR VOLUMES
Superconductivity induced renormalization of Raman-and infrared-active optical phonons is studied for undoped and T¢-reduced Pr-and Zn-substituted double-chain YBa2CuaOa materials. The magnitude of the phonon frequency and the linewidth variation upon cooling below T, is found to be dependent on the
The influence of hydrostatic pressure up to 1.1 GPa on critical parameters (To, Hc~, j~) of YBa2Cu4Os (Y 124) and Gd-Ba2Cu4Os (Gd124) ceramics has been investigated using a CuBe pressure bomb. A linear increase of Tc with the growth of pressure was found, with d Tc/dp = 5.5 K/GPa and 4.5 K/GPa for Y