Neutron diffraction studies of isotope-substituted tetragonal superconductors RBa2Cu2.76Fe0.24O7+o (R=Sm, Y)

Vitali Trunov, Yu Kaganovich, A. Kurbakov, A. Matveev, A. Balagurov, A. Hewat, P. Fischer, Olli Antson, R. Maayouf

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Abstract

We report results of neutron diffraction measurements on tetragonal (P4/mmm) Sm zero matrix superconductors (152,154)Sm(0)Ba2Cu2.76Fe0.24O7+δ with Tc in the range 59 to 70 K, and similar YBa2Cu2.76Fe0.24O7+δ samples with Fe and Cu isotopes.
The investigations were performed in the temperature range 8 to 300 K using three different high resolution diffractometers. Analysis of the measurements shows that Fe is distributed with approximately equal probability between the Cu(1) and Cu(2) positions.
The temperature dependences of the lattice parameters of the Sm and Y systems showing similar nonlinear variations and no abrupt changes, which might be characteristic of intermediate valence instabilities in Sm, were observed.

Original languageEnglish
Pages (from-to)123-130
JournalPhysica C: Superconductivity and its Applications
DOIs
Publication statusPublished - 1992
MoE publication typeA1 Journal article-refereed

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Neutron diffraction
Isotopes
Superconducting materials
neutron diffraction
isotopes
Diffractometers
diffractometers
Lattice constants
lattice parameters
valence
Temperature
temperature dependence
high resolution
matrices
temperature

Cite this

Trunov, Vitali ; Kaganovich, Yu ; Kurbakov, A. ; Matveev, A. ; Balagurov, A. ; Hewat, A. ; Fischer, P. ; Antson, Olli ; Maayouf, R. / Neutron diffraction studies of isotope-substituted tetragonal superconductors RBa2Cu2.76Fe0.24O7+o (R=Sm, Y). In: Physica C: Superconductivity and its Applications. 1992 ; pp. 123-130.
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title = "Neutron diffraction studies of isotope-substituted tetragonal superconductors RBa2Cu2.76Fe0.24O7+o (R=Sm, Y)",
abstract = "We report results of neutron diffraction measurements on tetragonal (P4/mmm) Sm zero matrix superconductors (152,154)Sm(0)Ba2Cu2.76Fe0.24O7+δ with Tc in the range 59 to 70 K, and similar YBa2Cu2.76Fe0.24O7+δ samples with Fe and Cu isotopes. The investigations were performed in the temperature range 8 to 300 K using three different high resolution diffractometers. Analysis of the measurements shows that Fe is distributed with approximately equal probability between the Cu(1) and Cu(2) positions. The temperature dependences of the lattice parameters of the Sm and Y systems showing similar nonlinear variations and no abrupt changes, which might be characteristic of intermediate valence instabilities in Sm, were observed.",
author = "Vitali Trunov and Yu Kaganovich and A. Kurbakov and A. Matveev and A. Balagurov and A. Hewat and P. Fischer and Olli Antson and R. Maayouf",
year = "1992",
doi = "10.1016/0921-4534(92)90245-8",
language = "English",
pages = "123--130",
journal = "Physica C: Superconductivity and its Applications",
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}

Trunov, V, Kaganovich, Y, Kurbakov, A, Matveev, A, Balagurov, A, Hewat, A, Fischer, P, Antson, O & Maayouf, R 1992, 'Neutron diffraction studies of isotope-substituted tetragonal superconductors RBa2Cu2.76Fe0.24O7+o (R=Sm, Y)', Physica C: Superconductivity and its Applications, pp. 123-130. https://doi.org/10.1016/0921-4534(92)90245-8

Neutron diffraction studies of isotope-substituted tetragonal superconductors RBa2Cu2.76Fe0.24O7+o (R=Sm, Y). / Trunov, Vitali; Kaganovich, Yu; Kurbakov, A.; Matveev, A.; Balagurov, A.; Hewat, A.; Fischer, P.; Antson, Olli; Maayouf, R.

In: Physica C: Superconductivity and its Applications, 1992, p. 123-130.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Neutron diffraction studies of isotope-substituted tetragonal superconductors RBa2Cu2.76Fe0.24O7+o (R=Sm, Y)

AU - Trunov, Vitali

AU - Kaganovich, Yu

AU - Kurbakov, A.

AU - Matveev, A.

AU - Balagurov, A.

AU - Hewat, A.

AU - Fischer, P.

AU - Antson, Olli

AU - Maayouf, R.

PY - 1992

Y1 - 1992

N2 - We report results of neutron diffraction measurements on tetragonal (P4/mmm) Sm zero matrix superconductors (152,154)Sm(0)Ba2Cu2.76Fe0.24O7+δ with Tc in the range 59 to 70 K, and similar YBa2Cu2.76Fe0.24O7+δ samples with Fe and Cu isotopes. The investigations were performed in the temperature range 8 to 300 K using three different high resolution diffractometers. Analysis of the measurements shows that Fe is distributed with approximately equal probability between the Cu(1) and Cu(2) positions. The temperature dependences of the lattice parameters of the Sm and Y systems showing similar nonlinear variations and no abrupt changes, which might be characteristic of intermediate valence instabilities in Sm, were observed.

AB - We report results of neutron diffraction measurements on tetragonal (P4/mmm) Sm zero matrix superconductors (152,154)Sm(0)Ba2Cu2.76Fe0.24O7+δ with Tc in the range 59 to 70 K, and similar YBa2Cu2.76Fe0.24O7+δ samples with Fe and Cu isotopes. The investigations were performed in the temperature range 8 to 300 K using three different high resolution diffractometers. Analysis of the measurements shows that Fe is distributed with approximately equal probability between the Cu(1) and Cu(2) positions. The temperature dependences of the lattice parameters of the Sm and Y systems showing similar nonlinear variations and no abrupt changes, which might be characteristic of intermediate valence instabilities in Sm, were observed.

U2 - 10.1016/0921-4534(92)90245-8

DO - 10.1016/0921-4534(92)90245-8

M3 - Article

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JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

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