Low-temperature elastic moduli and dilational and shear internal frictions of superconducting ceramic GdBa2Cu3O7−δ
Mikio Fukuhara, Asao Sanpei
DOI 10.1103/PhysRevB.49.13099 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Longitudinal and transverse wave velocities, six kinds of elastic parameters, and dilational and shear internal frictions have been simultaneously measured as functions of temperature between room temperature and 77 K in the high-Tc superconductor GdBa2Cu3O7−δ. An abrupt increase from 117 K in bulk modulus and Lamè parameter suggests that the order parameter has a much stronger coupling with volume-nonpreserving distortions than with volume-preserving distortions. The 227 and 120 K peaks in dilational friction might be related to structural change and second-order phase transition due to variation of potential energy, respectively. For shear friction, the 214 and 106 K peaks could be attributed to barium atom relaxation with an apparent activation energy of 0.62 eV, and lattice instability, respectively.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| GdBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89 | Pressure not reported | zero_resistance |
| GdBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | onset |
Similar papers
Transport critical current in rare-earth-substituted superconductors RBa2Cu3O7−δ (R=Gd, Dy, Sm, Ho, Y)
similarity 0.94S. Jin et al.
Source status unknown — claims are unverified
Thermal and electronic properties of rare-earth Ba2Cu3Ox superconductors
similarity 0.94J. Heremans et al.
Source status unknown — claims are unverified
Effect of physical and chemical pressure on the superconductivity of high-temperature oxide superconductors
similarity 0.93A. A. R. Fernandes et al.
Source status unknown — claims are unverified
Internal friction and Young’s modulus in the Bi(Pb)-Sr-Ca-Cu-O superconductor
similarity 0.93Du Jiaju et al.
Source status unknown — claims are unverified
Electron paramagnetic resonance of Gd3+ ions in the superconductor GdBa2Cu3Ox
similarity 0.93F. Mehran et al.
Source status unknown — claims are unverified
Structural and superconducting properties of R1−xCaxBa2Cu3O7−δ with 0.50>~x>~0.00
similarity 0.93A. Sedky et al.
Source status unknown — claims are unverified