Application of 151Eu Mössbauer spectroscopy to studies of electric field gradients in high-temperature superconductors

J. Lindén; T. Karlemo; M. Karppinen; T. Katila; M. Lippmaa; A. Nara; L. Niinistö; I. Tittonen; K. Ullakko; H. Yamauchi

doi:10.1007/BF02072920

Application of ¹⁵¹Eu Mössbauer spectroscopy to studies of electric field gradients in high-temperature superconductors

J. Lindén^*, T. Karlemo, M. Karppinen, T. Katila, M. Lippmaa, A. Nara, L. Niinistö, I. Tittonen, K. Ullakko, H. Yamauchi

^*Korresponderande författare för detta arbete

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Forskningsoutput: Tidskriftsbidrag › Artikel › Vetenskaplig › Peer review

Sammanfattning

The rare-earth site of samples having the compositions (Fe,Cu)Sr₂(Eu,Ce)_nCu₂O_{4+2 n+z} (n=2 and 3) were studied by¹⁵¹Eu Mössbauer spectroscopy. The results obtained are compared with measurements of EuBa₂Cu₃O_7-δ (1:2:3) and Bi₂Sr₂(Ca_1-yEu_y)Cu₂O_8+E (2:2:1:2) samples. The full quadrupole Hamiltonian of the 21.5-keV γ-transition was applied in analyzing the measured spectra. Simultaneous fitting of spectra recorded from crystallites oriented in various directions was used to determine the hyperfine parameters of the n= 2 and 3 samples. Two different electric field gradients, not discernible in simple random crystallite measurements, were obtained for the n=3 series.

Originalspråk	Engelska
Sidor (från-till)	1635-1639
Antal sidor	5
Tidskrift	Hyperfine Interactions
Volym	93
DOI	https://doi.org/10.1007/BF02072920
Status	Publicerad - dec. 1994
MoE-publikationstyp	A1 Tidskriftsartikel-refererad

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10.1007/BF02072920

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@article{65aa59a726924071b91b580c3816177a,

title = "Application of 151Eu M{\"o}ssbauer spectroscopy to studies of electric field gradients in high-temperature superconductors",

abstract = "The rare-earth site of samples having the compositions (Fe,Cu)Sr2(Eu,Ce)nCu2O4+2 n+z (n=2 and 3) were studied by151Eu M{\"o}ssbauer spectroscopy. The results obtained are compared with measurements of EuBa2Cu3O7-δ (1:2:3) and Bi2Sr2(Ca1-yEuy)Cu2O8+E (2:2:1:2) samples. The full quadrupole Hamiltonian of the 21.5-keV γ-transition was applied in analyzing the measured spectra. Simultaneous fitting of spectra recorded from crystallites oriented in various directions was used to determine the hyperfine parameters of the n= 2 and 3 samples. Two different electric field gradients, not discernible in simple random crystallite measurements, were obtained for the n=3 series.",

author = "J. Lind{\'e}n and T. Karlemo and M. Karppinen and T. Katila and M. Lippmaa and A. Nara and L. Niinist{\"o} and I. Tittonen and K. Ullakko and H. Yamauchi",

year = "1994",

month = dec,

doi = "10.1007/BF02072920",

language = "English",

volume = "93",

pages = "1635--1639",

journal = "Hyperfine Interactions",

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TY - JOUR

T1 - Application of 151Eu Mössbauer spectroscopy to studies of electric field gradients in high-temperature superconductors

AU - Lindén, J.

AU - Karlemo, T.

AU - Karppinen, M.

AU - Katila, T.

AU - Lippmaa, M.

AU - Nara, A.

AU - Niinistö, L.

AU - Tittonen, I.

AU - Ullakko, K.

AU - Yamauchi, H.

PY - 1994/12

Y1 - 1994/12

N2 - The rare-earth site of samples having the compositions (Fe,Cu)Sr2(Eu,Ce)nCu2O4+2 n+z (n=2 and 3) were studied by151Eu Mössbauer spectroscopy. The results obtained are compared with measurements of EuBa2Cu3O7-δ (1:2:3) and Bi2Sr2(Ca1-yEuy)Cu2O8+E (2:2:1:2) samples. The full quadrupole Hamiltonian of the 21.5-keV γ-transition was applied in analyzing the measured spectra. Simultaneous fitting of spectra recorded from crystallites oriented in various directions was used to determine the hyperfine parameters of the n= 2 and 3 samples. Two different electric field gradients, not discernible in simple random crystallite measurements, were obtained for the n=3 series.

AB - The rare-earth site of samples having the compositions (Fe,Cu)Sr2(Eu,Ce)nCu2O4+2 n+z (n=2 and 3) were studied by151Eu Mössbauer spectroscopy. The results obtained are compared with measurements of EuBa2Cu3O7-δ (1:2:3) and Bi2Sr2(Ca1-yEuy)Cu2O8+E (2:2:1:2) samples. The full quadrupole Hamiltonian of the 21.5-keV γ-transition was applied in analyzing the measured spectra. Simultaneous fitting of spectra recorded from crystallites oriented in various directions was used to determine the hyperfine parameters of the n= 2 and 3 samples. Two different electric field gradients, not discernible in simple random crystallite measurements, were obtained for the n=3 series.

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U2 - 10.1007/BF02072920

DO - 10.1007/BF02072920

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SN - 0304-3834

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JO - Hyperfine Interactions

JF - Hyperfine Interactions

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