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Title: Syntheses, structure and properties of a new Fillowite-type compound Na 0.48 Mn 1.22 PO 4

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1413311
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Alloys and Compounds; Journal Volume: 734; Journal Issue: C
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Zhao, Pan, Feng, Kai, Wang, Yonggang, and Gao, Jianhua. Syntheses, structure and properties of a new Fillowite-type compound Na 0.48 Mn 1.22 PO 4. United States: N. p., 2018. Web. doi:10.1016/j.jallcom.2017.10.214.
Zhao, Pan, Feng, Kai, Wang, Yonggang, & Gao, Jianhua. Syntheses, structure and properties of a new Fillowite-type compound Na 0.48 Mn 1.22 PO 4. United States. doi:10.1016/j.jallcom.2017.10.214.
Zhao, Pan, Feng, Kai, Wang, Yonggang, and Gao, Jianhua. 2018. "Syntheses, structure and properties of a new Fillowite-type compound Na 0.48 Mn 1.22 PO 4". United States. doi:10.1016/j.jallcom.2017.10.214.
@article{osti_1413311,
title = {Syntheses, structure and properties of a new Fillowite-type compound Na 0.48 Mn 1.22 PO 4},
author = {Zhao, Pan and Feng, Kai and Wang, Yonggang and Gao, Jianhua},
abstractNote = {},
doi = {10.1016/j.jallcom.2017.10.214},
journal = {Journal of Alloys and Compounds},
number = C,
volume = 734,
place = {United States},
year = 2018,
month = 2
}
  • A new layered perovskite Sr{sub 2}Al{sub 0.78}Mn{sub 1.22}O{sub 5.2} has been synthesized by solid state reaction in a sealed evacuated silica tube. The crystal structure has been determined using electron diffraction, high-resolution electron microscopy, and high-angle annular dark field imaging and refined from X-ray powder diffraction data (space group P4/mmm, a=3.89023(5) A, c=7.8034(1) A, R{sub I}=0.023, R{sub P}=0.015). The structure is characterized by an alternation of MnO{sub 2} and (Al{sub 0.78}Mn{sub 0.22})O{sub 1.2} layers. Oxygen atoms and vacancies, as well as the Al and Mn atoms in the (Al{sub 0.78}Mn{sub 0.22})O{sub 1.2} layers are disordered. The local atomic arrangement inmore » these layers is suggested to consist of short fragments of brownmillerite-type tetrahedral chains of corner-sharing AlO{sub 4} tetrahedra interrupted by MnO{sub 6} octahedra, at which the chain fragments rotate over 90 deg. This results in an averaged tetragonal symmetry. This is confirmed by the valence state of Mn measured by EELS. The relationship between the Sr{sub 2}Al{sub 0.78}Mn{sub 1.22}O{sub 5.2} tetragonal perovskite and the parent Sr{sub 2}Al{sub 1.07}Mn{sub 0.93}O{sub 5} brownmillerite is discussed. Magnetic susceptibility measurements indicate spin glass behavior of Sr{sub 2}Al{sub 0.78}Mn{sub 1.22}O{sub 5.2}. The lack of long-range magnetic ordering contrasts with Mn-containing brownmillerites and is likely caused by the frustration of interlayer interactions due to presence of the Mn atoms in the (Al{sub 0.78}Mn{sub 0.22})O{sub 1.2} layers. - Graphical abstract: In contrast to Sr{sub 2}Al{sub 1.07}Mn{sub 0.93}O{sub 5}, the local atomic arrangement in these layers consist of short fragments of brownmillerite-type tetrahedral chains of corner-sharing AlO{sub 4} tetrahedra interrupted by MnO{sub 6} octahedra, at which the chain fragments rotate over 90 deg. When derived by bulk structure determination techniques such as X-ray powder diffraction, the structure will be described with an averaged tetragonal symmetry.« less
  • The isomorphous title compounds (and the ordered substitutional Rb{sub 14}CsTl{sub 27}) are obtained directly from reactions of the elements in sealed Ta below {approximately} 330 {degrees}C. Refinements of single-crystal data for the three established a structure with alternate layers of isolated pentacapped trigonal prismatic Tl{sub 11}{sup 7{minus}} (D{sub 3h}) ions and condensed {sub {infinity}}{sup 2}[Tl{sub 16}{sup 8{minus}}] networks that are separated by cations. The condensed layer consists of Tl{sub 11} units that share prismatic edges and are interbridged through waist-capping atoms (Tl{sub 6/2}Tl{sub 3}Tl{sub 2}). (Rb{sub 15}Tl{sub 27}: P62m, Z = 1, {alpha} = 10.3248(6) {Angstrom}, c= 17.558(2) {Angstrom}.) Themore » rubidium phase is a poor metal ({rho}{sub 293} {approximately} 34 {mu}{Omega}{center_dot}cm) and is Pauli-paramagnetic. Extended Hueckel band calculations indicate partially filled bands and a non-zero DOS at E{sub F}, consistent with the observed metallic behavior, although appropriate cation tuning or modest anion doping should provide a Zintl phase. The band structure and COOP curves are also used to rationalize the distortion of the Tl{sub 11} unit on condensation and the critical role of the interfragment bonds between waist-capping atoms in stabilizing the layer.« less
  • Single crystals of a new intermetallic gallide, R-CePd{sub 3}Ga{sub 8}, have been synthesized from excess molten gallium. Single-crystal X-ray diffraction reveals that R-CePd{sub 3}Ga{sub 8} crystallizes in the R-3m space group with a=b=c=8.4903(10) {angstrom} and {alpha}={beta}={gamma}=89.993(17). R-CePd{sub 3}Ga{sub 8} is a variant of the cubic BaHg{sub 11} structure type with three structural units: a Ce-centered polyhedron, a distorted cube of Pd{sub 2}Ga{sub 6} and a Pd-centered cuboctahedron. The distortions of these units are compared to a undistorted analogous units in intermetallic compounds with BaHg{sub 11} structure type. Field and temperature-dependent magnetization measurements on R-CePd{sub 3}Ga{sub 8} reveal a paramagnetic materialmore » with strong antiferromagnetic correlations and a magnetization consistent with Ce{sup 3+}. Electrical resistance measurements indicate Kondo behavior between localized Ce{sup 3+} magnetic moments.« less
  • Single crystals of a new intermetallic gallide, R-CePd{sub 3}Ga{sub 8}, have been synthesized from excess molten gallium. Single-crystal X-ray diffraction reveals that R-CePd{sub 3}Ga{sub 8} crystallizes in the R-3m space group with a=b=c=8.4903(10) A and {alpha}={beta}={gamma}=89.993(17). R-CePd{sub 3}Ga{sub 8} is a variant of the cubic BaHg{sub 11} structure type with three structural units: a Ce-centered polyhedron, a distorted cube of Pd{sub 2}Ga{sub 6} and a Pd-centered cuboctahedron. The distortions of these units are compared to undistorted analogous units in intermetallic compounds with BaHg{sub 11} structure type. Field and temperature-dependent magnetization measurements on R-CePd{sub 3}Ga{sub 8} reveal a paramagnetic material withmore » strong antiferromagnetic correlations and a magnetization consistent with Ce{sup 3+}. Electrical resistance measurements indicate Kondo behavior between localized Ce{sup 3+} magnetic moments. - Graphical Abstract: Single crystals of CePd{sub 3}Ga{sub 8} have been synthesized from Ga flux. This new compound is the first rhombohedral variant of the cubic BaHg{sub 11} structure type. Highlights: Black-Right-Pointing-Triangle Single crystals of CePd{sub 3}Ga{sub 8} were synthesized from gallium flux. Black-Right-Pointing-Triangle CePd{sub 3}Ga{sub 8} is the first rhombohedral variant of the cubic BaHg{sub 11} structure type. Black-Right-Pointing-Triangle Paramagnetic with antiferromagnetic correlations. Black-Right-Pointing-Triangle Magnetization consistent with Ce{sup 3+}.« less
  • Epitaxial thin film heterostructures of high dielectric PbZr{sub 1-x}Ti{sub x}O{sub 3} (PZT) and La{sub 1-x}A{sub x}MnO{sub 3} (A-divalent alkaline earth metals such as Sr (LSMO) and Ca (LCMO)) were grown on SrTiO{sub 3} substrates and their structure, temperature dependence of electrical resistivity, and magnetization were investigated as a function of the thickness of the LSMO(LCMO) layer. The microstructures of the samples were analyzed by TEM. By applying an electric field across the PZT layer, we applied a ferrodistortive pressure on the manganite layer and studied the correlations between lattice distortion and electric transport and magnetic properties of the CMR materials.