Magnetic phase transitions in Nd sub 2 CuO sub 4

Journal Article · Tue May 01 04:00:00 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), Journal Name: Journal of Applied Physics; (USA) Vol. 67:9; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

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