Peculiarities of crystal structure and crystal-field excitations in `1212' AlSr2RCu2O7 (R = Y, Er)

A. Podlesnyak; A. Mirmelstein; V. Bobrovskii; V. Voronin; E. Mitberg; S. Lapin; E. Khlybov; P. Fischer; F. Fauth; A. Furrer

doi:10.1016/S0921-4534(00)00238-0

Peculiarities of crystal structure and crystal-field excitations in `1212' AlSr₂RCu₂O₇ (R = Y, Er)

A. Podlesnyak, A. Mirmelstein, V. Bobrovskii, V. Voronin, E. Mitberg, S. Lapin, E. Khlybov, P. Fischer, F. Fauth, A. Furrer

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1 Scopus citations

Abstract

Investigation of substitution effects for various sites in the `1212' perovskite-like systems with a general formula R(Sr,Ba)₂(Cu_3-yM_y)O_7-δ (M = Fe, Co, Hg, Al, Ga, Zn, and Ni and R = rare earth) is of great interest in connection with the problem of high-T_c superconductivity. The crystal structure of the `1212' AlSr₂RCu₂O₇ (R = Y, Er) compounds has been studied using high-resolution neutron powder and electron microscope diffraction measurements. Inelastic neutron scattering has been employed to search for crystalline-electric-field (CEF) transitions. The structural results yield evidence for superlattice ordering with orthorhombic symmetry (Pm2a space group). The CEF spectrum turns out to be a superposition of two components, which can be related to a local inhomogeneity of charge states within the CuO₂ planes.

Original language	English
Pages (from-to)	55-63
Number of pages	9
Journal	Physica C: Superconductivity and its Applications
Volume	334
Issue number	1
DOIs	https://doi.org/10.1016/S0921-4534(00)00238-0
State	Published - Jun 1 2000
Externally published	Yes

Funding

The authors are grateful to the Département de Physique de la Matière Condensée, Université de Genève, for having access to the SEM and EDAX facility as well as the X-ray diffractometer. The research described in this publication was made possible due to support by the Swiss National Science Foundation (Project No. 7 IP 050162.96/1), the Russian State Program to Support Leading Scientific Schools (Grant No. 96-15-96515), the Russian State Programs “Neutron Investigation of Matter” (Project No. 96-104, 96-305) and “Superconductivity” (Project No. 96-051).

Funders	Funder number
Russian State Program to Support Leading Scientific Schools	96-15-96515
Russian State Programs	96-104, 96-305, 96-051
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	7 IP 050162.96/1

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title = "Peculiarities of crystal structure and crystal-field excitations in `1212' AlSr2RCu2O7 (R = Y, Er)",

abstract = "Investigation of substitution effects for various sites in the `1212' perovskite-like systems with a general formula R(Sr,Ba)2(Cu3-yMy)O7-δ (M = Fe, Co, Hg, Al, Ga, Zn, and Ni and R = rare earth) is of great interest in connection with the problem of high-Tc superconductivity. The crystal structure of the `1212' AlSr2RCu2O7 (R = Y, Er) compounds has been studied using high-resolution neutron powder and electron microscope diffraction measurements. Inelastic neutron scattering has been employed to search for crystalline-electric-field (CEF) transitions. The structural results yield evidence for superlattice ordering with orthorhombic symmetry (Pm2a space group). The CEF spectrum turns out to be a superposition of two components, which can be related to a local inhomogeneity of charge states within the CuO2 planes.",

author = "A. Podlesnyak and A. Mirmelstein and V. Bobrovskii and V. Voronin and E. Mitberg and S. Lapin and E. Khlybov and P. Fischer and F. Fauth and A. Furrer",

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T1 - Peculiarities of crystal structure and crystal-field excitations in `1212' AlSr2RCu2O7 (R = Y, Er)

AU - Podlesnyak, A.

AU - Mirmelstein, A.

AU - Bobrovskii, V.

AU - Voronin, V.

AU - Mitberg, E.

AU - Lapin, S.

AU - Khlybov, E.

AU - Fischer, P.

AU - Fauth, F.

AU - Furrer, A.

PY - 2000/6/1

Y1 - 2000/6/1

N2 - Investigation of substitution effects for various sites in the `1212' perovskite-like systems with a general formula R(Sr,Ba)2(Cu3-yMy)O7-δ (M = Fe, Co, Hg, Al, Ga, Zn, and Ni and R = rare earth) is of great interest in connection with the problem of high-Tc superconductivity. The crystal structure of the `1212' AlSr2RCu2O7 (R = Y, Er) compounds has been studied using high-resolution neutron powder and electron microscope diffraction measurements. Inelastic neutron scattering has been employed to search for crystalline-electric-field (CEF) transitions. The structural results yield evidence for superlattice ordering with orthorhombic symmetry (Pm2a space group). The CEF spectrum turns out to be a superposition of two components, which can be related to a local inhomogeneity of charge states within the CuO2 planes.

AB - Investigation of substitution effects for various sites in the `1212' perovskite-like systems with a general formula R(Sr,Ba)2(Cu3-yMy)O7-δ (M = Fe, Co, Hg, Al, Ga, Zn, and Ni and R = rare earth) is of great interest in connection with the problem of high-Tc superconductivity. The crystal structure of the `1212' AlSr2RCu2O7 (R = Y, Er) compounds has been studied using high-resolution neutron powder and electron microscope diffraction measurements. Inelastic neutron scattering has been employed to search for crystalline-electric-field (CEF) transitions. The structural results yield evidence for superlattice ordering with orthorhombic symmetry (Pm2a space group). The CEF spectrum turns out to be a superposition of two components, which can be related to a local inhomogeneity of charge states within the CuO2 planes.

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Peculiarities of crystal structure and crystal-field excitations in `1212' AlSr₂RCu₂O₇ (R = Y, Er)

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