Magnetic phase transitions in Nd sub 2 CuO sub 4

Journal Article · Tue May 01 00:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.344859· OSTI ID:7122645

Skanthakumar, S; Zhang, H; Clinton, T W; Sumarlin, I W; Li, W; Lynn, J W ^[1]; Fisk, Z ^[2]; Cheong, S ^[3]

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1. Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742 (USA) National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (USA)
2. MS K764, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
3. MS K764, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA) Department of Physics, University of California-Los Angeles, Los Angeles, California 90024 (USA)

Polarized and unpolarized neutron scattering techniques along with x-ray diffraction have been used to study the magnetic and structural properties of a single crystal of Nd{sub 2}CuO{sub 4}. Long-range magnetic order of the Cu moments develops at {ital T}{sub {ital N}}=245 K, with a simple antiferromagnetic configuration of spins as found in La{sub 2}NiO{sub 4}, while the spin directions may be either collinear or noncollinear. Additional abrupt transitions are observed at 75 and 30 K, in which spin reorientations take place. Bragg peaks associated with the crystal structure are found at the same positions as the magnetic Bragg peaks, and indicate that a small distortion of the basic tetragonal structure has occurred above 300 K. At low temperatures the Nd moments also order antiferromagnetically ({ital T}{sub {ital N}}=1.5 K), while an additional transition of a continuous nature is observed at 150 mK.

• OSTI ID: 7122645
• Journal Information: Journal of Applied Physics; (USA), Vol. 67:9; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
CRYSTAL STRUCTURE
MAGNETIC PROPERTIES
NEODYMIUM OXIDES
ANTIFERROMAGNETISM
LOW TEMPERATURE
MONOCRYSTALS
NEUTRON DIFFRACTION
PHASE TRANSFORMATIONS
POLARIZATION
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
X-RAY DIFFRACTION
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
CRYSTALS
DIFFRACTION
MAGNETISM
NEODYMIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties