Abrupt but continuous antiferromagnetic transition in nearly stoichiometric La[sub 2]CuO[sub 4+[delta]]

Journal Article · Mon Jan 31 04:00:00 EST 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.760· OSTI ID:5226719

MacLaughlin, D E; Vithayathil, J P ^[1]; Brom, H B; de Rooy, J C.J.M. ^[2]; Hammel, P C; Canfield, P C; Reyes, A P; Fisk, Z; Thompson, J D; Cheong, S ^[3]

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1. University of California, Riverside, California 92521-0413 (United States)
2. Kamerlingh Onnes Laboratorium, University of Leiden, 2300 RA Leiden (Netherlands)
3. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Zero-field [sup 139]La nuclear quadrupole resonance (NQR) has been used to characterize the antiferromagnetic transition in nearly stoichiometric single crystals of La[sub 2]CuO[sub 4+[delta]] (Neel temperatures [ital T][sub [ital N]] between 275 and 318 K). The onset of the NQR Zeeman splitting at [ital T][sub [ital N]] is abrupt but continuous, indicative of a second-order phase transition with either a crossover in critical behavior just below [ital T][sub [ital N]] or a very small critical exponent [beta][approx lt]0.1. The absence of any anomaly at [ital T][sub [ital N]] in the [sup 139]La electric field gradient indicates no accompanying structural distortion.

• OSTI ID: 5226719
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:5; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANTIFERROMAGNETISM
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETISM
MONOCRYSTALS
NEEL TEMPERATURE
NUCLEAR QUADRUPOLE RESONANCE
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RESONANCE
STOICHIOMETRY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
ZEEMAN EFFECT