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.
Moya X; Gonzalez-Alonso D; Manosa L; Planes A; Garlea V O; Lograsso T A; Schlagel D L; Zarestky J L; Aksoy S; Acet M . 2009. Lattice dynamics in magnetic superelastic Ni-Mn-In alloys: Neutron scattering and ultrasonic experiments. Physical Review B. 79:214118.
Dhaka R S; D'Souza S W; Maniraj M; Chakrabarti A; Schlagel D L; Lograsso T A; Barman S R . 2009. Photoemission study of the (100) surface of Ni2MnGa and Mn2NiGa ferromagnetic shape memory alloys. Surface Science. 603:1999-2004.
Pieper O; Lake B; Daoud-Aladine A; Reehuis M; Prokes K; Klemke B; Kiefer K; Yan J Q; Niazi A; Johnston D C; Honecker A . 2009. Magnetic structure and interactions in the quasi-one-dimensional antiferromagnet CaV2O4. Physical Review B. 79:180409.
Li J Y; Jensen T B S; Andersen N H; Zarestky J L; McCallum R W; Chung J H; Lynn J W; Vaknin D . 2009. Tweaking the spin-wave dispersion and suppressing the incommensurate phase in LiNiPO4 by iron substitution. Physical Review B. 79:174435.
Yuhasz W M; Schlagel D L; Xing Q; Dennis K W; McCallum R W; Lograsso T A . 2009. Influence of annealing and phase decomposition on the magnetostructural transitions in Ni50Mn39Sn11. Journal of Applied Physics. 105:07a921.
Petculescu G; LeBlanc J B; Wun-Fogle M; Restorff J B; Yuhasz W M; Lograsso T A; Clark A E . 2009. Magnetoelastic coupling in Fe100-xGex single crystals with 4 < x < 18. Journal of Applied Physics. 105:07a932.
Ledieu J; Krajci M; Hafner J; Leung L; Wearing L H; McGrath R; Lograsso T A; Wu D; Fournee V . 2009. Nucleation of Pb starfish clusters on the five-fold Al-Pd-Mn quasicrystal surface. Physical Review B. 79:165430.
Shukla A K; Dhaka R S; D'Souza S W; Singh S; Wu D; Lograsso T A; Krajci M; Hafner J; Horn K; Barman S R . 2009. Quasiperiodic layers of free-electron metals studied using electron diffraction. Physical Review B. 79:134206.
Xing Q; Lograsso T A . 2009. A rapid method to correct objective lens astigmatism in a TEM. Ultramicroscopy. 109:287-290.