Novel Materials Preparation & Processing Methodologies
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:
- growth-based activities that have focused on identifying the operating limits for solution growth methods by defining stable growth regimes,
- 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,
- 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.
Liu Y; Xing Q; Dennis K W; McCallum R W; Lograsso T A . 2012. Evolution of precipitate morphology during heat treatment and its implications for the superconductivity in KxFe1.6+ySe2 single crystals. Physical Review B. 86:144507.
Bao L H; He L; Meyer N; Kou X F; Zhang P; Chen Z G; Fedorov A V; Zou J; Riedemann T M; Lograsso T A; Wang K L; Tuttle G; Xiu F X . 2012. Weak Anti-localization and Quantum Oscillations of Surface States in Topological Insulator Bi2Se2Te. Scientific Reports. 2:726.
Li G; Grissonnanche G; Yan J Q; McCallum R W; Lograsso T A; Zhou H D; Balicas L . 2012. High superconducting anisotropy and weak vortex pinning in Co-doped LaFeAsO. Physical Review B. 86:054517.
Jiang R; Wang L L; Huang M L; Dhaka R S; Johnson D D; Lograsso T A; Kaminski A . 2012. Reversible tuning of the surface state in a pseudobinary Bi-2(Te-Se)(3) topological insulator. Physical Review B. 86:085112.
Jesche A; Dennis K W; Kreyssig A; Canfield P C . 2012. Nearly itinerant ferromagnetism in CaNi2 and CaNi3. Physical Review B. 85:224432.
Du Y; Huang M; Lograsso T A; McQueeney R J . 2012. X-ray diffuse scattering measurements of chemical short-range order and lattice strains in a highly magnetostrictive Fe0.813Ga0.187 alloy in an applied magnetic field. Physical Review B. 85:214437.
Bi W; Souza-Neto N M; Haskel D; Fabbris G; Alp E E; Zhao J; Hennig R G; Abd-Elmeguid M M; Meng Y; McCallum R W; Dennis K; Schilling J S . 2012. Synchrotron x-ray spectroscopy studies of valence and magnetic state in europium metal to extreme pressures. Physical Review B. 85:205134.
Petculescu G; Lambert P K; Clark A E; Hathaway K B; Xing Q; Lograsso T A; Restorff J B; Wun-Fogle M . 2012. Temperature dependence of magnetoelastic properties of Fe100-xSix (5 < x < 20). Journal of Applied Physics. 111:07a921.
Mudryk Y; Singh N K; Pecharsky V K; Schlagel D L; Lograsso T A; Gschneidner K A . 2012. Magnetic and structural properties of single-crystalline Er5Si4. Physical Review B. 85:094432.