Local chemistry and vibrational behavior of the rare-earth in the high Tc superconductor EuBa2Cu3O7-□

P. Boolchand; R. N. Enzweiler; Ivan Zitkovsky; R. L. Meng; P. H. Hor; C. W. Chu; C. Y. Huang

doi:10.1016/0038-1098(87)90283-3

Local chemistry and vibrational behavior of the rare-earth in the high T_c superconductor EuBa₂Cu₃O_7-□

P. Boolchand, R. N. Enzweiler, Ivan Zitkovsky, R. L. Meng, P. H. Hor, C. W. Chu, C. Y. Huang

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Abstract

Temperature dependent ¹⁵¹Eu Mossbauer spectroscopy experiments on the high T_c≧90K superconductor EuBa₂Cu₃O₇ in the range of 4.2K < T < 300K display evidence of Eu³⁺ site only. No evidence of Eu²⁺ sites is observed. Variation of isomer-shift σ(T) and recoil-free-fraction f(T) shows that the mean square displacement (lnf) and mean square velocity (σ) of the Eu³⁺ site are both characterized by a Debye temperature θ_D=280(5)K. No discernible evidence of a phonon mediated structural transition as a precursor to T_c is observed in the temperature range examined.

Original language	English
Pages (from-to)	521-524
Number of pages	4
Journal	Solid State Communications
Volume	63
Issue number	6
DOIs	https://doi.org/10.1016/0038-1098(87)90283-3
Publication status	Published - 1987 Aug

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/0038-1098(87)90283-3

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@article{cc228795da90497fa890a335975f8ed3,

title = "Local chemistry and vibrational behavior of the rare-earth in the high Tc superconductor EuBa2Cu3O7-□",

abstract = "Temperature dependent 151Eu Mossbauer spectroscopy experiments on the high Tc≧90K superconductor EuBa2Cu3O7 in the range of 4.2K < T < 300K display evidence of Eu3+ site only. No evidence of Eu2+ sites is observed. Variation of isomer-shift σ(T) and recoil-free-fraction f(T) shows that the mean square displacement (lnf) and mean square velocity (σ) of the Eu3+ site are both characterized by a Debye temperature θD=280(5)K. No discernible evidence of a phonon mediated structural transition as a precursor to Tc is observed in the temperature range examined.",

author = "P. Boolchand and Enzweiler, {R. N.} and Ivan Zitkovsky and Meng, {R. L.} and Hor, {P. H.} and Chu, {C. W.} and Huang, {C. Y.}",

note = "Funding Information: We thank Professor Darl McDaniel for several useful ~ts. This work was supported by NSF grant DMR-8521005 at University of Cincinnati, NSF grant DMR-8616537, NASA grants NAGW-977 and NAG8-51 University of Houston, and Independent Research funds at Lockheed.",

year = "1987",

month = aug,

doi = "10.1016/0038-1098(87)90283-3",

language = "English",

volume = "63",

pages = "521--524",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Limited",

number = "6",

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TY - JOUR

T1 - Local chemistry and vibrational behavior of the rare-earth in the high Tc superconductor EuBa2Cu3O7-□

AU - Boolchand, P.

AU - Enzweiler, R. N.

AU - Zitkovsky, Ivan

AU - Meng, R. L.

AU - Hor, P. H.

AU - Chu, C. W.

AU - Huang, C. Y.

N1 - Funding Information: We thank Professor Darl McDaniel for several useful ~ts. This work was supported by NSF grant DMR-8521005 at University of Cincinnati, NSF grant DMR-8616537, NASA grants NAGW-977 and NAG8-51 University of Houston, and Independent Research funds at Lockheed.

PY - 1987/8

Y1 - 1987/8

N2 - Temperature dependent 151Eu Mossbauer spectroscopy experiments on the high Tc≧90K superconductor EuBa2Cu3O7 in the range of 4.2K < T < 300K display evidence of Eu3+ site only. No evidence of Eu2+ sites is observed. Variation of isomer-shift σ(T) and recoil-free-fraction f(T) shows that the mean square displacement (lnf) and mean square velocity (σ) of the Eu3+ site are both characterized by a Debye temperature θD=280(5)K. No discernible evidence of a phonon mediated structural transition as a precursor to Tc is observed in the temperature range examined.

AB - Temperature dependent 151Eu Mossbauer spectroscopy experiments on the high Tc≧90K superconductor EuBa2Cu3O7 in the range of 4.2K < T < 300K display evidence of Eu3+ site only. No evidence of Eu2+ sites is observed. Variation of isomer-shift σ(T) and recoil-free-fraction f(T) shows that the mean square displacement (lnf) and mean square velocity (σ) of the Eu3+ site are both characterized by a Debye temperature θD=280(5)K. No discernible evidence of a phonon mediated structural transition as a precursor to Tc is observed in the temperature range examined.

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JF - Solid State Communications

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ER -

Local chemistry and vibrational behavior of the rare-earth in the high T_c superconductor EuBa₂Cu₃O_7-□

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