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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...
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Full Text:: , Ni).[11–30] Greaves et al. first reported on the Li3Zn2XO6 (X = Bi, Sb) compositions.[11] Since

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...
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Full Text:: compositions was provided by Kimizuka et al., but the physical properties were not reported [11]. In this

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...
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Full Text:: be the result of possible ferrimagnetic interactions [11]. Although reflections from the InFeMgO4

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...
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Full Text:: Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland (Received 24 May 2012; accepted 11 June

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...
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Full Text:: . XRD patterns of YCu0.5Ti0.5O3 before (lower) and after (upper) reduction. 11

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...
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Full Text:: , which include polymer materials,11 are not ferro- electrics and do show pyroelectric current maxima

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...
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Full Text:: toughening in brittle materials via grain bridging in the 11 wake of the crack [59-62], the

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...
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Full Text:: . Polychroniadis, and M.G. Kanatzidis, Science 303, 818 (2004). 11. J. Androulakis, C.-H. Lin, H.-J. Kong, C. Uher

Creator:: Lawes, G., Ramirez, A. P., Varma, C. M., and Subramanian, M. A.
Abstract:: We report on the effects of spin fluctuations, magnetic ordering, and external magnetic field on the dielectric constant of the ferromagnet SeCuO₃, and the antiferromagnet TeCuO₃. A model based on the coupling between uniform polarization and the q-dependent spin-spin correlation function is presented to explain the different behaviors for these...
Resource Type:: Article
Full Text:: , M. Ta- kano, and Y. Tokura, Phys. Rev. B 67, 180401 (2003). [11] Nicola A. Hill, J. Phys. Chem. B

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