Neutron diffraction study of the magnetic ordering of BaCuO[sub 2+[ital x]] (abstract)
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Department of Physics and Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States)
Neutron diffraction experiments have been performed in order to study the magnetic ordering of BaCuO[sub 2+[ital x]]. In these measurements unpolarized neutrons and polarized neutrons with full polarization analysis have been utilized. From these measurements it has been determined that BaCuO[sub 2+[ital x]] orders antiferromagnetically below [ital T][sub [ital N]]=15.0[plus minus]0.5 K with a magnetic propagating vector [kappa]=[1 1 1]. This structure is commonly referred to as a [[pi][pi][pi]] or a G structure. The Cu atoms in the Cu[sub 6] ring clusters, located at the (1/4, 1/4, 1/4) positions, order ferromagnetically within these clusters while the clusters themselves order antiferromagnetically. The ordered magnetic moment of each of these Cu atoms is 0.89[plus minus]0.05 [mu][sub [ital B]] at [ital T]=4.2 K. No evidence of long-range magnetic ordering of the Cu atoms in the Cu[sub 18] clusters, located at the (0, 0, 0) and (1/2, 1/2, 1/2) positions, was found down to a temperature [ital T]=2.5 K. The work at Oak Ridge National Laboratory (ORNL) was sponsored by the Division of Materials Sciences, U.S. Department of Energy (DOE). ORNL is managed for the U.S. DOE by Martin Marietta Energy Systems, Inc., under Contract No. DE-AC05-84OR21400. Ames Laboratory is operated for the U.S. DOE under Contract No. W-7405-Eng-82. The work at Ames was supported by the Director for Energy Research, Office of Basic Energy Sciences.
- DOE Contract Number:
- AC05-84OR21400; W-7405-ENG-82
- OSTI ID:
- 7207469
- 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
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
DIFFRACTION
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETISM
NEEL TEMPERATURE
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE