Crystal structure and magnetic ordering of Pr in (Pb{sub 0.5}Cu{sub 0.5}){sub 2}(Ba{sub 0.5}Sr{sub 0.5}){sub 2}PrCu{sub 2}O{sub 8}

Journal Article · Tue Apr 01 00:00:00 EST 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.365004· OSTI ID:496533

Lin, Y; Chuang, W Y; Li, W; Lee, K C ^[1]; Lynn, J W ^[2]; Yang, C L; Ku, H C ^[3]

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1. Department of Physics, National Central University, Chung-li, Taiwan 32054, Republic of (China)
2. Reactor Radiation Division, NIST, Gaithersburg, Maryland 20899 (United States)
3. Department of Physics, National Tsing Hua University, Hsinchu, Taiwan 300, Republic of (China)

The crystal structure of polycrystalline PbBaSrPrCu{sub 3}O{sub 8} was studied using high resolution neutron diffraction. Rietveld refinement of the diffraction pattern shows that the compound crystallizes into the Tl{sub 2}Ba{sub 2}YCu{sub 2}O{sub 8} 2212-type structure. The Pb and Cu atoms in the two (Pb,Cu)O layers are randomly mixed to form two (Pb{sub 0.5}Cu{sub 0.5})O layers, and the Ba and Sr atoms are also randomly mixed to form two (Ba{sub 0.5}Sr{sub 0.5})O layers, resulting in (Pb{sub 0.5}Cu{sub 0.5}){sub 2}(Ba{sub 0.5}Sr{sub 0.5}){sub 2}PrCu{sub 2}O{sub 8}. The magnetic ordering of the Pr ions was also studied using magnetic neutron diffraction and ac susceptibility measurements. At low temperatures, magnetic peaks presumably originating from the Pr spin ordering were observed at the {l_brace}1/21/21/21/2{r_brace}, {l_brace}1/21/23/2{r_brace}, and {l_brace}1/21/25/2{r_brace} positions. The Pr spins order at T{sub N}{approx}9 K with the moment direction along the c axis and the nearest-neighbor spins coupled antiferromagnetically. A cusp associated with the antiferromagnetic ordering at T{sub N} is also clearly observed in ac susceptibility measurements. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 496533
• Report Number(s): CONF-961141-; ISSN 0021-8979; TRN: 97:016226
• Journal Information: Journal of Applied Physics, Vol. 81, Issue 8; Conference: 41. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 12-15 Nov 1996; Other Information: PBD: Apr 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STRONTIUM OXIDES
CRYSTAL STRUCTURE
PRASEODYMIUM OXIDES
COPPER OXIDES
BARIUM OXIDES
LEAD OXIDES
LEAD COMPOUNDS
COPPER COMPOUNDS
BARIUM COMPOUNDS
STRONTIUM COMPOUNDS
PRASEODYMIUM COMPOUNDS
ANTIFERROMAGNETIC MATERIALS
NEUTRON DIFFRACTION
MAGNETIC MOMENTS
MAGNETIC SUSCEPTIBILITY
POLYCRYSTALS