Journal
ACS APPLIED NANO MATERIALS
Volume 5, Issue 5, Pages 6297-6304Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c00394
Keywords
three-phase nanocomposite; thin film; morphology; ferromagnetic; hyperbolic; surface plasmon resonance (SPR)
Funding
- U.S. Department of Energy, Office of Science, Basic Energy Sciences (BES) [DE-SC0020077]
- U.S. National Science Foundation [DMR-2016453, DMR1565822, DMR-1809520]
- Los Alamos National Laboratory
- Office of Science and Graduate Student Research (SCGSR) Program
- Office of Naval Research [N00014-20-12043]
- U.S. Department of Energy (DOE) [DE-SC0020077] Funding Source: U.S. Department of Energy (DOE)
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Recent studies have discovered interesting morphologies and physical properties in complex nanocomposite thin films, showing great potential for future devices. This study successfully formed nanomushroom structures through adjusting the oxygen partial pressure. The resulting structures exhibit magnetic anisotropy, optical anisotropy, and dielectric function tuning, highlighting the potential of complex nanocomposite designs for nanoscale optical and magnetic device demonstrations.
Recent studies in complex nanocomposite thin films have brought forth interesting morphologies and physical properties and thus great potential for future devices. This study presents the formation of a nanomushroom structure developed from a complex three-phase nanocomposite system, i.e., the Co-CeO2-BaTiO3 (Co-CeO2-BTO) system. Via varying the oxygen partial pressure during deposition, the Co-CeO2-BTO system growth shows a microstructure tuning of vertically aligned Co nanopillars in a CeO2-BTO composite matrix processed in vacuum to the Co nano-mushroom-like structures under 200 mTorr oxygen. Such morphology tuning results in interesting physical property tuning such as magnetic anisotropy, optical anisotropy, and dielectric function tuning. This study suggests the effectiveness of morphology tuning via complex three-phase nanocomposite designs and processing condition variation. The resultant three-phase nanocomposite structures present great potential to address the needs on multifunctional hybrid materials for nanoscale optical and magnetic device demonstrations.
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