Skip to main content
U.S. flag

An official website of the United States government

Return to search results

Radio-Frequency Toroid Susceptometry of Magnetic Nanoparticles

Published by National Institute of Standards and Technology | National Institute of Standards and Technology | Catalog Last Checked: September 02, 2026 at 07:19 PM | Dataset Last Updated: September 09, 2025
Numerical data for figures in the article, "Radio-Frequency Toroid Susceptometry of Magnetic Nanoparticles: What Goes Around Comes Around," by Ronald B. Goldfarb, National Institute of Standards and Technology.

Resources

26 resources available

Find Related Datasets

Search by Tags

Click any tag below to search for similar datasets

Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "006:55"
]
contactPoint 
{
  "fn": "Ron B. Goldfarb",
  "hasEmail": "mailto:ron.goldfarb@nist.gov"
}
description Numerical data for figures in the article, "Radio-Frequency Toroid Susceptometry of Magnetic Nanoparticles: What Goes Around Comes Around," by Ronald B. Goldfarb, National Institute of Standards and Technology.
distribution 
[
  {
    "title": "Figure 13",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Comparison of susceptibility moduli for PBG 200.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2013%2C%20Comparison%20of%20susceptibility%20moduli%20for%20PBG%20200.csv"
  },
  {
    "title": "Figure 12",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Comparison of susceptibility moduli for PBG 600.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2012%2C%20Comparison%20of%20susceptibility%20moduli%20for%20PBG%20600.csv"
  },
  {
    "title": "Figure 11",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Comparison of susceptibility moduli for PBG 900.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2011%2C%20Comparison%20of%20susceptibility%20moduli%20for%20PBG%20900.csv"
  },
  {
    "title": "3991_README",
    "format": "TXT",
    "mediaType": "text/plain",
    "description": "Description of data set.",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-3991/3991_README.txt"
  },
  {
    "title": "Figure 3",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Details of the magnetization curves widely spaced in temperature.",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-3991/Figure%203%2C%20Details%20of%20the%20magnetization%20curves%20widely%20spaced%20in%20temperature.csv"
  },
  {
    "title": "Figure A1",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Distribution of particle diameters.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%20A1%2C%20Distribution%20of%20particle%20diameters.csv"
  },
  {
    "title": "Figure 5",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "For PBG 200, field-cooled, zero-field-cooled, and thermoremanent magnetization as functions of temperature.",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-3991/Figure%205%2C%20For%20PBG%20200%2C%20field-cooled%2C%20zero-field-cooled%2C%20and%20thermoremanent%20magnetization%20as%20functions%20of%20temperature.csv"
  },
  {
    "title": "Figure 22",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Imaginary part of susceptibility for PBG 200 for the different models.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2022%2C%20Imaginary%20part%20of%20susceptibility%20for%20PBG%20200%20for%20the%20different%20models.csv"
  },
  {
    "title": "Figure 20",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Imaginary part of susceptibility for PBG 600 for the different models.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2020%2C%20Imaginary%20part%20of%20susceptibility%20for%20PBG%20600%20for%20the%20different%20models.csv"
  },
  {
    "title": "Figure 18",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Imaginary part of susceptibility for PBG 900 for the different models.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2018%2C%20Imaginary%20part%20of%20susceptibility%20for%20PBG%20900%20for%20the%20different%20models.csv"
  },
  {
    "title": "Figure 4",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Langevin fits to the 265 K magnetization curve.",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-3991/Figure%204%2C%20Langevin%20fits%20to%20the%20265%20K%20magnetization%20curve.csv"
  },
  {
    "title": "Figure 2",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Magnetization versus internal field scaled by temperature for PBG 200 frozen in zero field.",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-3991/Figure%202%2C%20Magnetization%20versus%20internal%20field%20scaled%20by%20temperature%20for%20PBG%20200%20frozen%20in%20zero%20field.csv"
  },
  {
    "title": "Figure 16",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Modulus of susceptibility at 1 GHz for all filling fractions.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2016%2C%20Modulus%20of%20susceptibility%20at%201%20GHz%20for%20all%20filling%20fractions.csv"
  },
  {
    "title": "Figure 14",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Modulus of susceptibility at 100 MHz for all filling fractions.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2014%2C%20Modulus%20of%20susceptibility%20at%20100%20MHz%20for%20all%20filling%20fractions.csv"
  },
  {
    "title": "Figure 15",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Modulus of susceptibility at 500 MHz for all filling fractions.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2015%2C%20Modulus%20of%20susceptibility%20at%20500%20MHz%20for%20all%20filling%20fractions.csv"
  },
  {
    "title": "Figure 21",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Particle loss tangent for PBG 200 for the different models.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2021%2C%20Particle%20loss%20tangent%20for%20PBG%20200%20for%20the%20different%20models.csv"
  },
  {
    "title": "Figure 19",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Particle loss tangent for PBG 600 for the different models.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2019%2C%20Particle%20loss%20tangent%20for%20PBG%20600%20for%20the%20different%20models.csv"
  },
  {
    "title": "Figure 17",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Particle loss tangent for PBG 900 for the different models.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2017%2C%20Particle%20loss%20tangent%20for%20PBG%20900%20for%20the%20different%20models.csv"
  },
  {
    "title": "Figure 6",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Real and imaginary parts of relative permeability of PBG 900 as functions of frequency.",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-3991/Figure%206%2C%20Real%20and%20imaginary%20parts%20of%20relative%20permeability%20of%20PBG%20900%20as%20functions%20of%20frequency.csv"
  },
  {
    "title": "Figure C1",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Real part of relative permeability of a toroid of deionized water.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%20C1%2C%20Real%20part%20of%20relative%20permeability%20of%20a%20toroid%20of%20deionized%20water.csv"
  },
  {
    "title": "Figure C2",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Real part of relative permeability of a toroid of frozen deionized water.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%20C2%2C%20Real%20part%20of%20relative%20permeability%20of%20a%20toroid%20of%20frozen%20deionized%20water.csv"
  },
  {
    "title": "Figure 7",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Real, imaginary, and modulus susceptibility for PBG 900 as functions of frequency, Langevin model.",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-3991/Figure%207%2C%20Real%2C%20imaginary%2C%20and%20modulus%20susceptibility%20for%20PBG%20900%20as%20functions%20of%20frequency%2C%20Langevin%20model.csv"
  },
  {
    "title": "Figure 9",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Real, imaginary, and modulus susceptibility for PBG 900 as functions of frequency, Onsager model.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%209%2C%20Real%2C%20imaginary%2C%20and%20modulus%20susceptibility%20for%20PBG%20900%20as%20functions%20of%20frequency%2C%20Onsager%20model.csv"
  },
  {
    "title": "Figure 8",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Real, imaginary, and modulus susceptibility for PBG 900 as functions of frequency, Weiss model.",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-3991/Figure%208%2C%20Real%2C%20imaginary%2C%20and%20modulus%20susceptibility%20for%20PBG%20900%20as%20functions%20of%20frequency%2C%20Weiss%20model.csv"
  },
  {
    "title": "Figure 10",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Real, imaginary, and modulus susceptibility for PBG 900 as functions of frequency, modified mean-field model.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2010%2C%20Real%2C%20imaginary%2C%20and%20modulus%20susceptibility%20for%20PBG%20900%20as%20functions%20of%20frequency%2C%20modified%20mean-field%20model.csv"
  },
  {
    "title": "Figure 23",
    "format": "CSV UTF-8 Comma Delimited",
    "mediaType": "text/csv",
    "description": "Susceptibility moduli for evaporated PBG 900 with a filling fraction of 0.319.",
    "downloadURL": "https://data.nist.gov/od/ds/ark:/88434/mds2-3991/Figure%2023%2C%20Susceptibility%20moduli%20for%20evaporated%20PBG%20900%20with%20a%20filling%20fraction%20of%200.319.csv"
  }
]
identifier ark:/88434/mds2-3991
issued 2025-09-25
keyword 
[
  "Colloids",
  "dipole interactions",
  "ferrofluids",
  "impedance analyzers",
  "magnetic relaxation",
  "magnetic susceptibility",
  "magnetic viscosity",
  "nanoparticles",
  "permeability",
  "permeameters",
  "radio frequency",
  "standards",
  "superparamagnetism",
  "susceptometers",
  "toroids."
]
language 
[
  "en"
]
license https://www.nist.gov/open/license
modified 2025-09-09 00:00:00
programCode 
[
  "006:045"
]
publisher 
{
  "name": "National Institute of Standards and Technology",
  "@type": "org:Organization"
}
theme 
[
  "Nanotechnology:Nanomagnetics"
]
title Radio-Frequency Toroid Susceptometry of Magnetic Nanoparticles

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov