Papers by Anthony Ruffino
Materials Today, Apr 1, 2022
Thin Solid Films, 2020
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Nanoscale, 2018
We demonstrate a novel approach for tuning the ferroelectric phase transition in nanograined thin... more We demonstrate a novel approach for tuning the ferroelectric phase transition in nanograined thin films utilizing enhanced cation solubility.
Bulletin of the American Physical Society, 2016
(001) surface interaction has been studied at high temperature and near atmospheric pressures wit... more (001) surface interaction has been studied at high temperature and near atmospheric pressures with in situ x-ray scattering measurements. We find that the hexagonal reconstruction (hex) of Au (001) surface lifts to (11) in the presence of dioxygen. The measured lifting rate constant vs. temperature shows a 'volcano'-type behavior indicating that oxygen adsorption limits at high temperature while activation barrier of the lifting limits at low temperature. The pressure-temperature (PT) phase diagram obtained in our study shows three regions: hex at low P and T, (11) at high P and T, and coexistence of the hex and the (11) at the intermediate P and T.
Bulletin of the American Physical Society, 2015
1−x have martensite transition temperatures that increase strongly with x, while their ferromagne... more 1−x have martensite transition temperatures that increase strongly with x, while their ferromagnetic Curie temperatures remain nearly unchanged. The martensite transition approaches room temperature for x = 0.13. Within the tetragonal martensite phase, bulk magnetic properties depend strongly on stresses within the sample. These effects were investigated using post annealing, thermal cycling, and grinding. These treatments effect the bulk coercivity but do not move the transition temperatures. As the martensite forms, lattice elongations of > 3% are observed using XRD. Domain properties are reported, for both structural grains and magnetic ones, within the martensite phase, from optical and MFM imaging.
The Journal of Physical Chemistry C, 2016
Kinetics of molecular oxygen / Au (001) surface interaction has been studied at high temperature ... more Kinetics of molecular oxygen / Au (001) surface interaction has been studied at high temperature and near atmospheric pressures of O 2 gas with in situ x-ray scattering measurements. We find that the hexagonal reconstruction (hex) of Au (001) surface lifts to (1×1) in the presence of O 2 gas, indicating that the (1×1) is more favored when some oxygen atoms present on the surface. The measured lifting rate constant vs. temperature is found to be highest at intermediate temperature exhibiting a 'volcano'-type behavior. At low temperature, the hex-to-(1×1) activation barrier (E act = 1.3(3) eV) limits the lifting. At high temperature, oxygen adsorption energy (E ads = 1.6(2) eV) limits the lifting. The (1×1)-to-hex activation barrier (E hex = 0.41(14) eV) is also obtained from hex recovery kinetics. The pressure-temperature (PT)
arXiv (Cornell University), Apr 15, 2023
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Papers by Anthony Ruffino