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Your search keyword '"McCloy, John S."' showing total 16 results
Start Over Author "McCloy, John S." Publication Type Conference Materials
16 results on '"McCloy, John S."'

1. Chromium doped gallium oxide nanowire-based thermometer and the study of the anisotropic refractive index temperature dependence

Author

Carrasco, Daniel, primary, Alonso-Orts, Manuel, additional, Nieto, Eva, additional, Serna, Rosalía, additional, San Juan, José María, additional, Nó, María Luisa, additional, Jesenovec, Jani, additional, McCloy, John S., additional, de Andrés, Alicia, additional, Nogales Díaz, Emilio, additional, and Méndez, Bianchi, additional

Published
2024
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5. Incorporation of Arsenic in CdSe/CdTe Solar Cells During Close Spaced Sublimation of CdTe:As

Author

Jamarkattel, Manoj K., primary, Phillips, Adam B., additional, Quader, Abdul, additional, Subedi, Kamala Khanal, additional, Alfadhili, Fadhil K., additional, Bista, Sandip Singh, additional, Awni, Rasha A., additional, Li, Deng-Bing, additional, Swain, Santosh K., additional, Yan, Yanfa, additional, Ellingson, Randy J., additional, McCloy, John S., additional, Lynn, Kelvin G., additional, and Heben, Michael J., additional

Published
2020
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15. Structure and magnetic properties of irradiated Fe-Fe oxide core-shell nanoclusters.

Author

McCloy, John S., Jiang, Weilin, Sundararajan, Jennifer A., Qiang, You, Burks, Edward, and Liu, Kai

Subjects
MAGNETIC properties of iron oxides, CLUSTER analysis (Statistics), PARTICLE size distribution, THICKNESS measurement, X-ray diffraction, HELIUM ions, ANTIFERROMAGNETISM
Abstract

A cluster deposition method was used to produce a film of loosely aggregated particles of Fe-Fe3O4 coreshell nanoclusters with an 8 nm iron core size and 2 nm oxide shell thickness. The film of particles on a silicon substrate was irradiated with 5.5 MeV Si2+ ions to a fluence of 1016 cm-2 near room temperature, and computer simulations based on the SRIM (Stopping and Range of Ions in Matter) code show that the implanted Si species stops near the filmsubstrate interface. The ion irradiation creates a structural change in the film with corresponding chemical and magnetic changes. X-ray diffraction shows that the core size and chemistry stay the same but the shell becomes FeO that grows to a thickness of 17 nm. Helium ion microscopy shows that the previously separate particles have densified into a nearly continuous film. Major loop magnetic hysteresis measurements show a decrease in saturation magnetization that we attribute to the presence of the antiferromagnetic (AFM) FeO shell. First-order reversal curve measurements on the irradiated film performed with a vibrating sample magnetometer show that the AFM shell prevents the particles from interacting magnetically, leading to low coercivity from the iron core and little bias field from the core interactions. These results, and others reported previously on different compositions (Fe3O4 or FeO+Fe3N nanoclusters), show that the ion irradiation behavior of nanocluster films such as these depends strongly on the initial nanostructure and chemistry. [ABSTRACT FROM AUTHOR]

Published
2013
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