Order parameter

{
  "id": "MLC-T-CHM-008301",
  "term": "Order parameter",
  "field": "Chemistry",
  "definition": "A macroscopic quantity that characterizes the degree of order in a system undergoing a phase transition. Its value is typically zero in the disordered phase and non-zero in the ordered phase. For example, in a ferromagnetic transition, the magnetization can serve as an order parameter.",
  "subject": "Inorganic Chemistry",
  "references": [
    "PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 587 (https://doi.org/10.1351/pac199466030577)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/order-parameter/"
}