Index Catalog // ScholarsArchive@OSU

Structural and magnetic investigation of Fe3+ and Mg2+ substitution into the trigonal bipyramidal site of InGaCuO4

Creator:: Grajczyk, Rosa, Berthelot, Romain, Muir, Sean, Sleight, A. W., and Subramanian, M. A.
Abstract:: The solid solutions of InGa₁₋ₓFeₓCuO₄, InFeCu₁₋ₓMgₓO₄, and InGa₁₋ₓFeₓCu₁₋ₓMgₓO₄ were synthesized and characterized through the use of X – ray and neutron diffraction, and DC – magnetism measurements. All compositions of InGa₁₋ₓFeₓCuO₄ are single phase and crystallize in the R3m space group, but a transformation to the spinel InFeMgO₄ structure was...
Resource Type:: Article
Full Text:: of Chemistry, Oregon State University, Corvallis, OR 97331 *Corresponding author

Stability of the ferromagnetic ground state of La₂ MnNiO₆ against large compressive stress

Creator:: Haskel, D., Fabbris, G., Souza-Neto, N. M., van Veenendaal, M., Shen, G., Smith, A. E., and Subramanian, M. A.
Abstract:: The effect of quasi-hydrostatic pressure upon the ferromagnetic ground state of magnetodielectric, double- perovskite La₂ MnNiO₆ is investigated using x-ray absorption spectroscopy and diffraction measurements in a diamond anvil cell. The Mn-O-Ni superexchange interaction that gives rise to ferromagnetism in this cation- ordered structure is stable to at least 38...
Resource Type:: Article
Full Text:: , Oregon State University, Corvallis, Oregon 97331-4003, USA (Received 7 July 2011; revised manuscript

Dielectric and polarization experiments in high loss dielectrics: A word of caution

Creator:: Maglione, M. and Subramanian, M. A.
Abstract:: The recent quest for improved functional materials like high permittivity dielectrics and/or multiferroics has triggered an intense wave of research. Many materials have been checked for their dielectric permittivity or their polarization state. In this report, we call for caution when samples are simultaneously displaying an insulating behavior and a...
Resource Type:: Article
Full Text:: State University, Corvallis, Oregon 97331, USA �Received 7 May 2008; accepted 2 June 2008; published

Solid Solution Studies of Layered Honeycomb-Ordered Phases O3-Na3M2SbO6 (M = Cu, Mg, Ni, Zn)

Creator:: Schmidt, Whitney, Berthelot, Romain, Sleight, A. W., and Subramanian, M. A.
Abstract:: Complete solid solutions with the composition Na₃M₂₋ₓM’ₓSbO₆ where M, M’ = Cu, Mg, Ni, Zn have been synthesized by conventional solid state techniques and were investigated using X-ray diffraction, magnetism and optical measurements. All compositions crystallize in a monoclinic unit cell and exhibit a layered structure with a honeycomb cationic...
Resource Type:: Article
Full Text:: , Romain Berthelot, A. W. Sleight, M. A. Subramanian* Department of Chemistry, Oregon State University

Fracture Toughness of Co4Sb12 and In0.1Co4Sb12 Thermoelectric Skutterudites Evaluated by Three Methods

Creator:: Eilertsen, James, Subramanian, M. A., and Kruzic, J. J.
Abstract:: Interstitially filled skutterudites are a promising class of state-of-the-art thermoelectric materials. Although thermoelectrics are exposed to significant thermal stresses, little information is known about the fracture toughness of interstitially doped skutterudites. This work explores the fracture toughness of undoped Co₄Sb₁₂ and indium doped In₀.₁Co₄Sb₁₂ skutterudites using three methods: 1) Vickers...
Resource Type:: Article
Full Text:: , Oregon State University, Corvallis, OR 97331, USA Abstract Interstitially filled skutterudites are

Structural and magnetic investigation of In₂Fe₂₋ₓGaₓCuO₇

Creator:: Grajczyk, Rosa, Chan, Adam, Ramirez, A. P., and Subramanian, M. A.
Abstract:: The solid solution of In₂Fe₂₋ₓGaₓCuO₇ (space group P6₃/mmc) was synthesized and investigated through X-ray diffraction and magnetic susceptibility studies. Limited changes to the lattice parameters were observed as a result of the similar ionic radii for Fe³⁺ and Ga³⁺ in the trigonal bipyramidal (TBP) crystallographic site. An increase in the...
Resource Type:: Article
Full Text:: , Oregon State University, Corvallis, OR 97331 ‡ Department of Physics, University of California Santa

Growth, optical and magnetic behavior of YMn0.35In0.65O3 thin film

Creator:: Mangalam, R. V. K., Smith, Andrew E., Boudin, S., McLoughlin, C., Subramanian, M. A., and Prellier, W.
Abstract:: The growth of YMn₀.₃₅In₀.₆₅O₃ thin films and their optical and magnetic behavior are reported. The YMn₀.₃₅In₀.₆₅O₃ thin film grows along the (0001) orientation with hexagonal structure similar to YMnO₃ on c-plane sapphire. The film shows paramagnetic behavior in the temperature range measured. The film exhibits a blue color due to...
Resource Type:: Article
Full Text:: du Maréchal Juin, F-14050 Caen Cedex, France 2Department of Chemistry, Oregon State University

Topotactic Reduction and Reoxidation of Hexagonal RCu0.5Ti0.5O3 (R =Y, Eu-Lu) Phases

Creator:: Jiang, Peng, Berthelot, Romian, Li, Jun, Sleight, A. W., and Subramanian, M. A.
Abstract:: Hexagonal AMO₂ and AMO₃ phases have the same basic structure, and intermediate compositions for this structure have been prepared by topotactic oxidation of AMO₂ phases such as RCuO₂, where R is a trivalent rare earth cation. We now find that such intermediate phases can also be prepared by topotactic reduction...
Resource Type:: Article
Full Text:: Berthelot, Jun Li, A.W. Sleight, and M.A. Subramanian* Department of Chemistry, Oregon State University

Effect of oxygen concentration on the structural and magnetic properties of LaRh₁/₂Mn₁/₂O₃ thin films

Creator:: Sheets, W. C., Smith, A. E., Subramanian, M. A., and Prellier, W.
Abstract:: Epitaxial LaRh₁/₂Mn₁/₂O₃ thin films have been grown on (001)-oriented LaAlO₃ and SrTiO₃ substrates using pulsed laser deposition. The optimized thin film samples are semiconducting and ferromagnetic with a Curie temperature close to 100 K, a coercive field of 1200 Oe, and a saturation magnetization of 1.7μB per formula unit. The...
Resource Type:: Article
Full Text:: 2Department of Chemistry, Oregon State University, Corvalis, Oregon 97331, USA �Received 19 August 2008

Thermal Cycling Effects on the Thermoelectric Properties of n-Type In,Ce-Based Skutterudite Compounds

Creator:: Biswas, Krishnendu, Subramanian, M. A., Good, Morris S., Roberts, Kamandi C., and Hendricks, Terry J.
Abstract:: n-Type In-filled CoSb₃ is a known skutterudite compound that has shown promising thermoelectric (TE) properties resulting in high dimensionless figure of merit values at elevated temperatures. Use in various waste heat recovery applications will require survival and operation after exposure to harsh thermal cycling environments. This research focused on uncovering...
Resource Type:: Article
Full Text:: . GOOD,2 KAMANDI C. ROBERTS,2 and TERRY J. HENDRICKS3,4 1.—Department of Chemistry, Oregon State

ScholarsArchive@OSU

Structural and magnetic investigation of Fe3+ and Mg2+ substitution into the trigonal bipyramidal site of InGaCuO4

Stability of the ferromagnetic ground state of La₂ MnNiO₆ against large compressive stress

Dielectric and polarization experiments in high loss dielectrics: A word of caution

Solid Solution Studies of Layered Honeycomb-Ordered Phases O3-Na3M2SbO6 (M = Cu, Mg, Ni, Zn)

Fracture Toughness of Co4Sb12 and In0.1Co4Sb12 Thermoelectric Skutterudites Evaluated by Three Methods

Structural and magnetic investigation of In₂Fe₂₋ₓGaₓCuO₇

Growth, optical and magnetic behavior of YMn0.35In0.65O3 thin film

Topotactic Reduction and Reoxidation of Hexagonal RCu0.5Ti0.5O3 (R =Y, Eu-Lu) Phases

Effect of oxygen concentration on the structural and magnetic properties of LaRh₁/₂Mn₁/₂O₃ thin films

Thermal Cycling Effects on the Thermoelectric Properties of n-Type In,Ce-Based Skutterudite Compounds

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