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.
D'Souza S W; Rai A; Nayak J; Maniraj M; Dhaka R S; Barman S R; Schlagel D L; Lograsso T A; Chakrabarti A . 2012. Coexistence of charge-density wave and ferromagnetism in Ni2MnGa. Physical Review B. 85:085123.
D'Souza S W; Nayak J; Maniraj M; Rai A; Dhaka R S; Barman S R; Schlagel D L; Lograsso T A; Chakrabarti A . 2012. Ni2MnGa(100) ferromagnetic shape memory alloy: A surface study. Surface Science. 606:130-136.
Marcano N; Algarabel P A; Fernandez J R; Magen C; Morellon L; Singh N K; Schlagel D L; Gschneidner K A; Pecharsky V K; Ibarra M R . 2012. Magnetism and magnetocaloric effect of single-crystal Er(5)Si(4) under pressure. Physical Review B. 85:024408.
Restorff J B; Wun-Fogle M; Hathaway K B; Clark A E; Lograsso T A; Petculescu G . 2012. Tetragonal magnetostriction and magnetoelastic coupling in Fe-Al, Fe-Ga, Fe-Ge, Fe-Si, Fe-Ga-Al, and Fe-Ga-Ge alloys. Journal of Applied Physics. 111:023905.
Thiel P A; Unal B; Jenks C J; Goldman A I; Canfield P C; Lograsso T A; Evans J W; Quiquandon M; Gratias D; Van Hove M A . 2011. A Distinctive Feature of the Surface Structure of Quasicrystals: Intrinsic and Extrinsic Heterogeneity. Israel Journal of Chemistry. 51:1326-1339.
Ma J; Yan J Q; Diallo S O; Stevens R; Llobet A; Trouw F; Abernathy D L; Stone M B; McQueeney R J . 2011. Role of magnetic exchange energy on charge ordering in R(1/3)Sr(2/3)FeO(3) (R = La, Pr, and Nd). Physical Review B. 84:224115.
Ren Y; Yan J Q; Zhou J S; Goodenough J B; Jorgensen J D; Short S; Kim H; Proffen T; Chang S; McQueeney R J . 2011. Spin-state transitions in PrCoO(3) studied with neutron powder diffraction. Physical Review B. 84:214409.
Yan J Q; Zhou J S; Cheng J G; Goodenough J B; Ren Y; Llobet A; McQueeney R J . 2011. Spin and orbital ordering in Y(1-x)La(x)VO(3). Physical Review B. 84:214405.