Synthesis, structure, and physical properties of La[sub 3-x]M[sub x]Ni[sub 2]O[sub 7-[delta]] (M = Ca[sup 2+], Sr[sup 2+], Ba[sup 2+]; 0 < x [le] 0. 075)

doi:https://doi.org/10.1006/jssc.1994.1209

Title: Synthesis, structure, and physical properties of La[sub 3-x]M[sub x]Ni[sub 2]O[sub 7-[delta]] (M = Ca[sup 2+], Sr[sup 2+], Ba[sup 2+]; 0 < x [le] 0. 075)

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Abstract

The synthesis, structure, and physical properties of La[sub 3-x]M[sub x]Ni[sub 2]O[sub 7-[delta]], with M = Ca[sup 2+], Sr[sup 2+], or Ba[sup 2+], and 0 < x [le] 0.075, were investigated. These compounds were prepared by a precursor method with tetramethyl ammonium hydroxide and were characterized by room temperature and high-temperature powder X-ray diffraction, TGA, electrical resistivity, and magnetic susceptibility measurements. The substituted compounds form with orthorhombic symmetry in space group Fmmm, similar to the as-prepared parent compound, La[sub 3]Ni[sub 2]O[sub 6.92]. As the amount of divalent alkaline earth metal substitution increases, the c cell parameter does not significantly change for Ca and increases significantly for Sr and Ba substitution, while the a and b cell parameters remain nearly unchanged for all cases. The observed trend in the c parameter is due to the increasing Ni[sup 3+] ion concentration for the case of Ca[sup 2+] substitution, while for Sr[sup 2+] and Ba[sup 2+] substitutions the effective larger size of the divalent cations is dominant. Significant oxygen deficiencies are noted in all of the as-prepared samples. However, upon high-pressure oxygen annealing, stoichiometric oxygen contents can be achieved. The room temperature resistivity of the as-prepared substituted compounds decreases relative to La[sub 3]Ni[sub 2]O[submore »« less

Authors:

Zhang, Z; Greenblatt, M ^[1]

State Univ. of New Jersey, Piscataway, NJ (United States)

Publication Date:: 1994-07-01

OSTI Identifier:: 6769856

Resource Type:: Journal Article

Journal Name:: Journal of Solid State Chemistry; (United States)

Additional Journal Information:: Journal Volume: 111:1; Journal ID: ISSN 0022-4596

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; BARIUM OXIDES; CRYSTAL STRUCTURE; PHYSICAL PROPERTIES; CALCIUM OXIDES; LANTHANUM OXIDES; NICKEL OXIDES; STRONTIUM OXIDES; CHEMICAL PREPARATION; ELECTRIC CONDUCTIVITY; MAGNETIC SUSCEPTIBILITY; ORTHORHOMBIC LATTICES; STOICHIOMETRY; THERMAL GRAVIMETRIC ANALYSIS; X-RAY DIFFRACTION; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL ANALYSIS; COHERENT SCATTERING; CRYSTAL LATTICES; DIFFRACTION; ELECTRICAL PROPERTIES; GRAVIMETRIC ANALYSIS; LANTHANUM COMPOUNDS; MAGNETIC PROPERTIES; NICKEL COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; QUANTITATIVE CHEMICAL ANALYSIS; RARE EARTH COMPOUNDS; SCATTERING; STRONTIUM COMPOUNDS; SYNTHESIS; THERMAL ANALYSIS; TRANSITION ELEMENT COMPOUNDS; 360202* - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 360204 - Ceramics, Cermets, & Refractories- Physical Properties; 360201 - Ceramics, Cermets, & Refractories- Preparation & Fabrication

Citation Formats


                    Zhang, Z, and Greenblatt, M. Synthesis, structure, and physical properties of La[sub 3-x]M[sub x]Ni[sub 2]O[sub 7-[delta]] (M = Ca[sup 2+], Sr[sup 2+], Ba[sup 2+]; 0 < x [le] 0. 075).  United States: N. p., 1994. 
        Web.  doi:10.1006/jssc.1994.1209.

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                    Zhang, Z, & Greenblatt, M. Synthesis, structure, and physical properties of La[sub 3-x]M[sub x]Ni[sub 2]O[sub 7-[delta]] (M = Ca[sup 2+], Sr[sup 2+], Ba[sup 2+]; 0 < x [le] 0. 075).  United States.  https://doi.org/10.1006/jssc.1994.1209

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                    Zhang, Z, and Greenblatt, M. Fri .  
        "Synthesis, structure, and physical properties of La[sub 3-x]M[sub x]Ni[sub 2]O[sub 7-[delta]] (M = Ca[sup 2+], Sr[sup 2+], Ba[sup 2+]; 0 < x [le] 0. 075)".  United States.  https://doi.org/10.1006/jssc.1994.1209.

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@article{osti_6769856,

  title        = {Synthesis, structure, and physical properties of La[sub 3-x]M[sub x]Ni[sub 2]O[sub 7-[delta]] (M = Ca[sup 2+], Sr[sup 2+], Ba[sup 2+]; 0 < x [le] 0. 075)},

  author       = {Zhang, Z and Greenblatt, M},

  abstractNote = {The synthesis, structure, and physical properties of La[sub 3-x]M[sub x]Ni[sub 2]O[sub 7-[delta]], with M = Ca[sup 2+], Sr[sup 2+], or Ba[sup 2+], and 0 < x [le] 0.075, were investigated. These compounds were prepared by a precursor method with tetramethyl ammonium hydroxide and were characterized by room temperature and high-temperature powder X-ray diffraction, TGA, electrical resistivity, and magnetic susceptibility measurements. The substituted compounds form with orthorhombic symmetry in space group Fmmm, similar to the as-prepared parent compound, La[sub 3]Ni[sub 2]O[sub 6.92]. As the amount of divalent alkaline earth metal substitution increases, the c cell parameter does not significantly change for Ca and increases significantly for Sr and Ba substitution, while the a and b cell parameters remain nearly unchanged for all cases. The observed trend in the c parameter is due to the increasing Ni[sup 3+] ion concentration for the case of Ca[sup 2+] substitution, while for Sr[sup 2+] and Ba[sup 2+] substitutions the effective larger size of the divalent cations is dominant. Significant oxygen deficiencies are noted in all of the as-prepared samples. However, upon high-pressure oxygen annealing, stoichiometric oxygen contents can be achieved. The room temperature resistivity of the as-prepared substituted compounds decreases relative to La[sub 3]Ni[sub 2]O[sub 6.92], and at x = 0.075 a semiconductor to metal transition is observed for all M. The magnetic susceptibility is nearly temperature independent in the temperature range 100-300 K, and paramagnetic behavior is observed below 100 K.},

  doi          = {10.1006/jssc.1994.1209},

  url          = {https://www.osti.gov/biblio/6769856},
  journal      = {Journal of Solid State Chemistry; (United States)},

  issn         = {0022-4596},

  number       = ,

  volume       = 111:1,

  place        = {United States},

  year         = {1994},

  month        = {7}

}

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Journal Article:

https://doi.org/10.1006/jssc.1994.1209

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