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Title: Enhanced magnetic and optical properties of Y3Fe5O12 (YIG) films with Au nanoinclusions

Journal Article · · Nanoscale
DOI: https://doi.org/10.1039/D5NR03907J · OSTI ID:3013888
ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [1]
  1. Purdue Univ., West Lafayette, IN (United States)
  2. Univ. of Nebraska, Lincoln, NE (United States)
  3. Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Y3Fe5O12 (YIG) thin films are well known for their ferrimagnetic insulating property and low Gilbert damping coefficient (α), allowing them to be used for various spintronic applications and as magneto-optical isolators for photonic devices. Instead of doping, incorporation of plasmonic metals as nanoinclusions could be a promising route for improved magneto-optical coupling properties. In this work, YIG–Au nanocomposites have been deposited with ferrimagnetic insulating YIG as the matrix and Au nanoinclusions which introduce plasmonic absorption, optical anisotropy, and hyperbolic properties. Films with varying Au nanoinclusion densities have been processed and annealed to compare with the as-deposited ones. The films that had low Au nanoinclusion density and were annealed presented a lower magnetic damping coefficient of 2.84 × 10−4 than the pure YIG film (9.66 × 10−4). The as-deposited film with the highest Au density shows the strongest hyperbolic properties among all samples. These results demonstrate that both magnetic damping and optical properties can be tuned through deposition conditions in YIG–Au nanocomposite thin films, allowing for a balance of both properties. This YIG–Au nanocomposite system presents promising potential in next-generation opto-spintronic devices.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
NA0003525; SC0020077
OSTI ID:
3013888
Report Number(s):
SAND--2026-15566J; 1786803
Journal Information:
Nanoscale, Journal Name: Nanoscale Journal Issue: 47 Vol. 17; ISSN 2040-3364; ISSN 2040-3372
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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