Neutron diffraction study of the magnetic ordering of BaCuO{sub 2+x}

Conference · Mon Aug 08 04:00:00 EDT 1994

OSTI ID:10190006

Wang, X L; Fernandez-Baca, J A ^[1]; Wang, Z R; Vaknin, D; Johnston, D C ^[2]

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1. Oak Ridge National Lab., TN (United States)
2. Iowa State Univ., Ames, IA (United States)

Neutron diffraction measurements have revealed that BaCuO{sub 2+x} orders antiferromagnetically below T{sub N} = (15.0 {+-} 0.5) with a magnetic propagating vector {kappa} = [1 1 1]. 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 {+-} 0.05){mu}{sub B} at T=4.2K. No evidence of long-range magnetic ordering of the Cu atoms in the Cu{sub 18} clusters, located at the (O, O, O) and (1/2, 1/2, 1/2) positions, was found down to a temperature T=2.5K.

• Research Organization: Oak Ridge National Lab., TN (United States); Iowa State Coll., Ames, IA (United States). Dept. of Physics
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400; W-7405-ENG-82
• OSTI ID: 10190006
• Report Number(s): CONF-9410165--8; ON: DE95001357
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202
360204
ANTIFERROMAGNETIC MATERIALS
BARIUM OXIDES
COPPER OXIDES
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
NEUTRON DIFFRACTION
PHYSICAL PROPERTIES
STRUCTURE AND PHASE STUDIES