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Title: Magnetochromic sensing and size-dependent collective excitations in iron oxide nanoparticles

Abstract

We combine optical and magneto-optical spectroscopies with complementary vibrational and magnetic property measurements to reveal finite length scale effects in nanoscale α–Fe 2O 3. Analysis of the d-to-d on-site excitations uncovers enhanced color contrast at particle sizes below approximately 75 nm due to size-induced changes in spin-charge coupling that are suppressed again below the superparamagnetic limit. These findings provide a general strategy for amplifying magnetochromism in α–Fe 2O 3 and other iron-containing nanomaterials that may be useful for advanced sensing applications. Lastly, we also unravel the size dependence of collective excitations in this iconic antiferromagnet.

Authors:
 [1];  [2];  [1];  [2];  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. State Univ. of New York at Stony Brook, Stony Brook, NY (United States)
  3. Stony Brook Univ., Stony Brook, NY (United States)
  4. Farmingdale State College, Farmingdale, NY (United States)
  5. Stony Brook Univ., Stony Brook, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  6. National High Magnetic Field Lab., Tallahassee, FL (United States)
  7. State Univ. of New York at Stony Brook, Stony Brook, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1347365
Alternate Identifier(s):
OSTI ID: 1346585
Report Number(s):
BNL-113636-2017-JA
Journal ID: ISSN 2469-9950; PRBMDO; R&D Project: PM037; KC0202050; TRN: US1700619
Grant/Contract Number:  
SC00112704; FG02-01ER45885; SC-00112704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 12; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

O'Neal, Kenneth R., Patete, Jonathan M., Chen, Peng, Nanavati, Ruhani, Holinsworth, Brian S., Smith, Jacqueline M., Marques, Carlos, Simonson, Jack W., Aronson, Meigan C., McGill, Stephen A., Wong, Stanislaus S., and Musfeldt, Janice L.. Magnetochromic sensing and size-dependent collective excitations in iron oxide nanoparticles. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.125416.
O'Neal, Kenneth R., Patete, Jonathan M., Chen, Peng, Nanavati, Ruhani, Holinsworth, Brian S., Smith, Jacqueline M., Marques, Carlos, Simonson, Jack W., Aronson, Meigan C., McGill, Stephen A., Wong, Stanislaus S., & Musfeldt, Janice L.. Magnetochromic sensing and size-dependent collective excitations in iron oxide nanoparticles. United States. doi:10.1103/PhysRevB.95.125416.
O'Neal, Kenneth R., Patete, Jonathan M., Chen, Peng, Nanavati, Ruhani, Holinsworth, Brian S., Smith, Jacqueline M., Marques, Carlos, Simonson, Jack W., Aronson, Meigan C., McGill, Stephen A., Wong, Stanislaus S., and Musfeldt, Janice L.. Fri . "Magnetochromic sensing and size-dependent collective excitations in iron oxide nanoparticles". United States. doi:10.1103/PhysRevB.95.125416. https://www.osti.gov/servlets/purl/1347365.
@article{osti_1347365,
title = {Magnetochromic sensing and size-dependent collective excitations in iron oxide nanoparticles},
author = {O'Neal, Kenneth R. and Patete, Jonathan M. and Chen, Peng and Nanavati, Ruhani and Holinsworth, Brian S. and Smith, Jacqueline M. and Marques, Carlos and Simonson, Jack W. and Aronson, Meigan C. and McGill, Stephen A. and Wong, Stanislaus S. and Musfeldt, Janice L.},
abstractNote = {We combine optical and magneto-optical spectroscopies with complementary vibrational and magnetic property measurements to reveal finite length scale effects in nanoscale α–Fe2O3. Analysis of the d-to-d on-site excitations uncovers enhanced color contrast at particle sizes below approximately 75 nm due to size-induced changes in spin-charge coupling that are suppressed again below the superparamagnetic limit. These findings provide a general strategy for amplifying magnetochromism in α–Fe2O3 and other iron-containing nanomaterials that may be useful for advanced sensing applications. Lastly, we also unravel the size dependence of collective excitations in this iconic antiferromagnet.},
doi = {10.1103/PhysRevB.95.125416},
journal = {Physical Review B},
number = 12,
volume = 95,
place = {United States},
year = {Fri Mar 10 00:00:00 EST 2017},
month = {Fri Mar 10 00:00:00 EST 2017}
}

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Works referenced in this record:

Magnetic Iron Oxide Nanoparticles: Synthesis, Stabilization, Vectorization, Physicochemical Characterizations, and Biological Applications
journal, June 2008

  • Laurent, Sophie; Forge, Delphine; Port, Marc
  • Chemical Reviews, Vol. 108, Issue 6, p. 2064-2110
  • DOI: 10.1021/cr068445e