Relationship between weak ferromagnetism, superconductivity, and lattice parameter in the [ital A][sub 2[minus][ital x][minus][ital y]][ital B][sub [ital x]]Ce[sub [ital y]]CuO[sub 4] ([ital A],[ital B][equivalent to]La, Pr, Nd, Sm, Eu, Gd, Y) compounds

Journal Article · Sun May 15 04:00:00 EDT 1994 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.356982· OSTI ID:7284050

Schultz, T; Smith, R; Fondado, A; Maley, C; Beacom, T; Tinklenberg, P; Gross, J; Saylor, C; Oseroff, S ^[1]; Fisk, Z ^[2]; Cheong, S ^[3]; Jones, T E ^[4]

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1. San Diego State University, San Diego, California 92182 (United States)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. AT T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)
4. NRaD, San Diego, California 92152 (United States)

We report the results obtained by x-ray, dc magnetization, ac magnetic susceptibility, microwave magnetic absorption, and electron paramagnetic resonance of the magnetic and superconductive properties of a large series of compounds of the form [ital A][sub 2[minus][ital x][minus][ital y]][ital B][sub [ital x]]Ce[sub [ital y]]CuO[sub 4] with [ital A],[ital B][equivalent to]La, Pr, Nd, Sm, Eu, Gd, and Y. For [ital y]=0 antiferromagnetic ordering of the copper moments is present at [ital T][sub [ital N]][approx]280 K for all the compounds formed in the tetragonal [ital T][prime] phase. Weak ferromagnetism (WF) associated with the canting of the copper moments is observed in all the compounds with a lattice parameter, [ital a][lt][ital a][sub 0], [ital a][sub 0][approx]3.91 A, regardless of the rare-earth ([ital R]) ions present in the system. Superconductivity is observed only in the Ce-doped compounds with [ital a][gt][ital a][sub 1], [ital a][sub 1][approx]3.92 A. The maximum onset temperature [ital T][sub [ital c]] is found for [ital a][approx]3.95 A. A phase diagram was obtained by varying the lattice parameter size as a function of [ital A], [ital B], and [ital x]. The correlation between the appearance of WF in the undoped compounds and the disappearance of superconductivity in the Ce-doped systems is discussed.

• OSTI ID: 7284050
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 75:10; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON SPIN RESONANCE
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
FERROMAGNETISM
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETIC RESONANCE
MAGNETIC SUSCEPTIBILITY
MAGNETISM
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
RESONANCE
SAMARIUM COMPOUNDS
SAMARIUM OXIDES
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES