Novel Materials Preparation & Processing Methodologies

Personnel

Project Leader(s):
Thomas Lograsso

Principal Investigators:
Iver Anderson, Paul Canfield, Lawrence Jones, Thomas Lograsso, R. William McCallum

Overview

The growth, control and modification of novel materials in single crystal and polycrystalline form, represent a national core competency that is essential for scientific advancement within and across traditional disciplinary boundaries, and are critical components of the USDOE Basic Energy Sciences' mission. In support of this mission, the Novel Materials Preparation and Processing Methodologies project strengthens the materials synthesis efforts of the Ames Laboratory.

The objectives of Novel Materials Preparation are to quantify and control processing-structure-property relationships: the basic science of how chemical inhomogeneities and structural defects affect properties of highly responsive materials; advance the ability to synthesize and characterize high purity, high quality materials, primarily in single crystal form; develop unique capabilities and processing knowledge in the preparation, purification, and fabrication of metallic elements and alloys.

Our efforts are grouped into three areas:

  1. growth-based activities that have focused on identifying the operating limits for solution growth methods by defining stable growth regimes,
  2. materials-focused investigations of highly responsive materials systems where synthesis challenges often limit the science and where careful control of synthesis structure relations are vital for understanding materials behavior,
  3. development of single crystals facilities that broaden and enhance our growth capabilities to address a wider range of materials.

In addition, the Materials Preparation Center, a specialized research center managed through the BES Synthesis & Processing core research area, provide high-purity, high-quality, and well-characterized materials in support of scientific research programs at the Ames Laboratory the general scientific community.

Highlights

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Publications

2009
Misra S; Mozharivskyj Y; Tsokol A O; Schlagel D L; Lograsso T A; Miller G J . 2009. Structural, magnetic, and thermal characteristics of the phase transitions in Gd5GaxGe4-x magnetocaloric materials. Journal of Solid State Chemistry. 182:3031-3040. abstract
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Shukla A K; Dhaka R S; D'Souza S W; Maniraj M; Barman S R; Horn K; Ebert P; Urban K; Wu D; Lograsso T A . 2009. Manganese adlayers on i-Al-Pd-Mn quasicrystal: growth and electronic structure. Journal of Physics-Condensed Matter. 21:405005. abstract
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Moore J D; Morrison K; Perkins G K; Schlagel D L; Lograsso T A; Gschneidner K A; Pecharsky V K; Cohen L F . 2009. Metamagnetism Seeded by Nanostructural Features of Single-Crystalline Gd5Si2Ge2. Advanced Materials. 21:3780-3783. abstract
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Du Y; Xing Q; Wun-Fogle M; Restorff J B; Clark A E; Huang M; McQueeney R J; Lograsso T A . 2009. Determination of Structural Anisotropy of Stress-Annealed Fe80.5Ga19.5. Ieee Transactions on Magnetics. 45:4142-4144. abstract
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Petculescu G; LeBlanc J B; Wun-Fogle M; Restorff J B; Burton W C; Cao J X; Wu R Q; Yuhasz W M; Lograsso T A; Clark A E . 2009. Magnetoelasticity of Fe100-xGex(5 < x < 18) Single Crystals From 81 K to 300 K. Ieee Transactions on Magnetics. 45:4149-4152. abstract
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Tian W; Kreyssig A; Zarestky J L; Tan L; Nandi S; Goldman A I; Lograsso T A; Schlagel D L; Gschneidner K A; Pecharsky V K; McQueeney R J . 2009. Single-crystal neutron diffraction study of short-range magnetic correlations in Tb5Ge4. Physical Review B. 80:134422. abstract
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Ma C; Yan J Q; Dennis K W; Llobet A; McCallum R W; Tan X . 2009. Effect of oxygen content on the magnetic properties of multiferroic YMn2O5+delta. Journal of Physics-Condensed Matter. 21:346002. abstract
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Canfield P C; Bud'ko S L; Ni N; Yan J Q; Kracher A . 2009. Decoupling of the superconducting and magnetic/structural phase transitions in electron-doped BaFe2As2. Physical Review B. 80:060501. abstract
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Ni N; Thaler A; Kracher A; Yan J Q; Bud'ko S L; Canfield P C . 2009. Phase diagrams of Ba(Fe1-xMx)(2)As-2 single crystals (M=Rh and Pd). Physical Review B. 80:024511. abstract
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McCallum R W; Yan J Q; Rustan G E; Mun E D; Singh Y; Das S; Nath R; Bud'ko S L; Dennis K W; Johnston D C; Canfield P C; Kramer M J; Kreyssig A; Lograsso T A; Goldman A I . 2009. In situ high energy x-ray synchrotron diffraction study of the synthesis and stoichiometry of LaFeAsO and LaFeAsO1-xFy. Journal of Applied Physics. 105:123912. abstract
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