The Chilton Group

Magnetism, Spectroscopy, Theory

About CC-FIT2

The CC-FIT2 program is a simple tool for the fitting of experimental AC magnetic data using the (generalised) Debye model, extraction of magnetic relaxation times with associated uncertainties, and fitting the temperature dependence of these data accosting for uncertainties in the underlying relaxation times. Pre-compiled binaries and the user manual are available for download below.

CC-FIT2 is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

CC-FIT2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with CC-FIT2. If not, see

We request that any results obtained through the use of CC-FIT2 are accompanied by the following reference:

D. Reta and N. F. Chilton, Phys. Chem. Chem. Phys., 2019, 21, 23567.

email: or

Windows (v2.6)

MacOS (v2.6)

Linux (v2.6)


GitLab repository

Change Log

CC-FIT2 v3.1

  • New Waveform module available. This module implements the methodology developed in Hilgar et al., Phys. Chem. Chem. Phys., 2019, 21, 22302.
  • New --process plot option in AC module to just show the raw data and skip any fitting
  • User manual has been improved