Elastic study of quench and composite europium barium copper oxide (EuBa2Cu3O7-δ(Eul23)) superconductor / Siti Noorzuraidah Jusoh.

Jusoh, Siti Noorzuraidah (2010) Elastic study of quench and composite europium barium copper oxide (EuBa2Cu3O7-δ(Eul23)) superconductor / Siti Noorzuraidah Jusoh. [Student Project] (Unpublished)

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Abstract

Ultrasonic longitudinal and shear velocities at 9MHz were measured using pulse-echo overlap techniques in temperature ranges of 80-280K and 80-220K, respectively, in EuBa2Cu3O7-δ +ywt.% AI2O3 (y = 0, O(quenched), 0.2 and 0.4) superconductors. A steplike elastic anomaly indicating sudden lattice stiffening was observed for x=0 at around 260K. However upon quenching to reduce the oxygen content, no anomaly was observed and only a monotonous change in velocity with increasing temperature was observed. Addition of AI2O3 only shifted the anomaly to slightly lower temperatures. The step-like elastic anomaly was discussed in terms of oxygen ordering involving Cu-O chains.

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Item Type: Student Project
Creators:
Creators
Email
Jusoh, Siti Noorzuraidah
UNSPECIFIED
Contributors:
Contribution
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Email / ID Num.
Thesis advisor
Mohd Deni, Mohd Salleh (Prof. Madya Dr.)
UNSPECIFIED
Subjects: T Technology > TJ Mechanical engineering and machinery > Mechanics applied to machinery. Dynamics
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Applied Sciences
Programme: Bachelor of Science (Hons.) Physics
Item ID: 45419
Uncontrolled Keywords: Ultrasonic longitudinal, Shear velocities, Superconductor
URI: https://ir.uitm.edu.my/id/eprint/45419

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