Ferromagnetism in lanthanum and/or cerium substituted t′ phases of gadolinium cuprate

Robert L. Fuller; K. V. Ramanujachary; Martha Greenblatt

doi:10.1016/0025-5408(92)90214-K

Ferromagnetism in lanthanum and/or cerium substituted t′ phases of gadolinium cuprate

Robert L. Fuller, K. V. Ramanujachary, Martha Greenblatt

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We have studied the effects of defect structure and electron-doping on the parasitic ferromagnetism in polycrystalline samples of the Gd_2-xLa_xCuO₄ and Gd_1.85-xLa_xCe_0.15CuO₄ with 0 ≤ x ≤ 1 solid solution series, crystallizing with T′ structure. In each of these series, below a critical value of the a cell parameter, a_c, the onset of ferromagnetism due to a canted arrangement of antiferromagnetically ordered copper moments was observed. The a_c values in each of these series were found to vary depending on the synthetic conditions and cerium substitution at the rare earth site. These effects were attributed to differences in the defect structure and electronic structure. The Gd_1.85-xLa_xCe_0.15CuO₄ compositions were also investigated to examine the occurrence of superconductivity, if any, in these phases.

Original language	English (US)
Pages (from-to)	205-212
Number of pages	8
Journal	Materials Research Bulletin
Volume	27
Issue number	2
DOIs	https://doi.org/10.1016/0025-5408(92)90214-K
State	Published - Feb 1992
Externally published	Yes

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/0025-5408(92)90214-K

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title = "Ferromagnetism in lanthanum and/or cerium substituted t′ phases of gadolinium cuprate",

abstract = "We have studied the effects of defect structure and electron-doping on the parasitic ferromagnetism in polycrystalline samples of the Gd2-xLaxCuO4 and Gd1.85-xLaxCe0.15CuO4 with 0 ≤ x ≤ 1 solid solution series, crystallizing with T′ structure. In each of these series, below a critical value of the a cell parameter, ac, the onset of ferromagnetism due to a canted arrangement of antiferromagnetically ordered copper moments was observed. The ac values in each of these series were found to vary depending on the synthetic conditions and cerium substitution at the rare earth site. These effects were attributed to differences in the defect structure and electronic structure. The Gd1.85-xLaxCe0.15CuO4 compositions were also investigated to examine the occurrence of superconductivity, if any, in these phases.",

author = "Fuller, {Robert L.} and Ramanujachary, {K. V.} and Martha Greenblatt",

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T1 - Ferromagnetism in lanthanum and/or cerium substituted t′ phases of gadolinium cuprate

AU - Fuller, Robert L.

AU - Ramanujachary, K. V.

AU - Greenblatt, Martha

PY - 1992/2

Y1 - 1992/2

N2 - We have studied the effects of defect structure and electron-doping on the parasitic ferromagnetism in polycrystalline samples of the Gd2-xLaxCuO4 and Gd1.85-xLaxCe0.15CuO4 with 0 ≤ x ≤ 1 solid solution series, crystallizing with T′ structure. In each of these series, below a critical value of the a cell parameter, ac, the onset of ferromagnetism due to a canted arrangement of antiferromagnetically ordered copper moments was observed. The ac values in each of these series were found to vary depending on the synthetic conditions and cerium substitution at the rare earth site. These effects were attributed to differences in the defect structure and electronic structure. The Gd1.85-xLaxCe0.15CuO4 compositions were also investigated to examine the occurrence of superconductivity, if any, in these phases.

AB - We have studied the effects of defect structure and electron-doping on the parasitic ferromagnetism in polycrystalline samples of the Gd2-xLaxCuO4 and Gd1.85-xLaxCe0.15CuO4 with 0 ≤ x ≤ 1 solid solution series, crystallizing with T′ structure. In each of these series, below a critical value of the a cell parameter, ac, the onset of ferromagnetism due to a canted arrangement of antiferromagnetically ordered copper moments was observed. The ac values in each of these series were found to vary depending on the synthetic conditions and cerium substitution at the rare earth site. These effects were attributed to differences in the defect structure and electronic structure. The Gd1.85-xLaxCe0.15CuO4 compositions were also investigated to examine the occurrence of superconductivity, if any, in these phases.

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Ferromagnetism in lanthanum and/or cerium substituted t′ phases of gadolinium cuprate

Abstract

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