Influence of Pr substitution on acoustic gruneisen parameter and lattice vibrational anharmonicity contribution in ceramic superconductors
This paper reports the effect of Pr substitution on lattice anharmonicity contribution to temperature dependent longitudinal and shear ultrasonic velocity data in (Er1-xPrx)Ba2Cu3O 6.9 (x 0.0, 0.1 and 0.2) and TlSr2(Ca1-yPr y)Cu2O7 (y 0.5 and 1.0) superconductors. Pr was observed to influence the de...
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Format: | Article |
Language: | English |
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Institute of Physics Publishing
2009
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Online Access: | View Fulltext in Publisher View in Scopus |
LEADER | 01697nam a2200145Ia 4500 | ||
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001 | 10.1088-1742-6596-153-1-012037 | ||
008 | 220112s2009 CNT 000 0 und d | ||
020 | |a 17426588 (ISSN) | ||
245 | 1 | 0 | |a Influence of Pr substitution on acoustic gruneisen parameter and lattice vibrational anharmonicity contribution in ceramic superconductors |
260 | 0 | |b Institute of Physics Publishing |c 2009 | |
856 | |z View Fulltext in Publisher |u https://doi.org/10.1088/1742-6596/153/1/012037 | ||
856 | |z View in Scopus |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-65749110207&doi=10.1088%2f1742-6596%2f153%2f1%2f012037&partnerID=40&md5=0b0c709bdaf9ad50103cacf146e8e780 | ||
520 | 3 | |a This paper reports the effect of Pr substitution on lattice anharmonicity contribution to temperature dependent longitudinal and shear ultrasonic velocity data in (Er1-xPrx)Ba2Cu3O 6.9 (x 0.0, 0.1 and 0.2) and TlSr2(Ca1-yPr y)Cu2O7 (y 0.5 and 1.0) superconductors. Pr was observed to influence the deviation of the elastic behaviour of both samples from the lattice anharmonicity curves at higher temperatures. The calculated effective Gruneisen parameter for the longitudinal mode (γeffL) for both compounds was found to increase with Pr content, indicating increasing anharmonicity contribution. In addition, both series also showed that γeffL is larger than the effective Gruneisen parameter for the shear mode (γeffL) throughout the substitution. The influence of Pr substitution on γeff and the BCS electron-phonon coupling constant (λ) as well as its possible relationship to superconductivity are discussed. © 2009 IOP Publishing Ltd. | |
700 | 1 | 0 | |a Yahya, A.K. |e author |
773 | |t Journal of Physics: Conference Series |