Term: magnetic susceptibility https://doi.org/10.1351/goldbook.MT06781 Definition: For paramagnetic materials, the magnetic susceptibility may be measured experimentally and used to give information on the molecular magnetic dipole moment, and hence on the electronic structure of the molecules in the material. The paramagnetic contribution to the molar magnetic susceptibility of a material, χ, is related to the molecular magnetic dipole moment m by the curie relation: χ = constant x m 2 T. Related Terms: 1) paramagnetic (http://doi.org/10.1351/goldbook.P04404). 2) dipole moment (http://doi.org/10.1351/goldbook.D01761). 3) curie (http://doi.org/10.1351/goldbook.C01444). Source: PAC, 1997, 69, 1251. 'Glossary of terms used in bioinorganic chemistry (IUPAC Recommendations 1997)' on page 1284 (https://doi.org/10.1351/pac199769061251) Citation: 'magnetic susceptibility' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.MT06781 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.