Effect of Alᶟ⁺ substitutions at Cu-site and AI₂O₃ addition on ultrasonic velocities and elasticanomalies of EuBa₂Cu₃O₇-ᵟ uperconductor / Mohd Muzammir Firdaus Abu Bakar
The ultrasonic longitudinal and shear velocities were measured in EuBa₂Cu₃O₇₋₈ (δ = 0.1 and 0.7), EuBa₂Cu₃₋ₓA1ₓO₇₋₈ (х = 0.06 and 0.1) and EuBa₂Cu₃O₇₋₈ + yA1₂O₃ (y = 0.2 and 0.1 wt%) superconductors in temperature ranges of 80-280K and 80-220K, respectively. For EuBa₂Cu₃O₇₋₈ (δ = 0.1 and 0.7), sampl...
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| Format: | Thesis |
| Language: | English |
| Published: |
2013
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| Online Access: | http://ir.uitm.edu.my/id/eprint/18465/ http://ir.uitm.edu.my/id/eprint/18465/2/TM_MOHD%20MUZAMMIR%20FIRDAUS%20ABU%20BAKAR%20AS%2013_5.pdf |
| Summary: | The ultrasonic longitudinal and shear velocities were measured in EuBa₂Cu₃O₇₋₈ (δ = 0.1 and 0.7), EuBa₂Cu₃₋ₓA1ₓO₇₋₈ (х = 0.06 and 0.1) and EuBa₂Cu₃O₇₋₈ + yA1₂O₃ (y = 0.2 and 0.1 wt%) superconductors in temperature ranges of 80-280K and 80-220K, respectively. For EuBa₂Cu₃O₇₋₈ (δ = 0.1 and 0.7), samples, the absolute velocity (at 80K) showed to decrease when the oxygen content was reduced from O6.9 to O6.3 . However, for EuBa₂Cu₃₋ₓA1ₓO₇₋₈ (х = 0.06 and 0.1)) samples, although both samples have same oxygen content (O6.8), the absolute velocity also showed to decrease when the amount of A1ᶟ⁺ increased… |
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