
***MAGNETOMETRY (FIG 2): folder: "PuledFieldData"

Data files labelled PF at the start refer to pulsed-field magnetisation measurements of (QuinH)2Cu(Br1-xClx )4∙2H2O as shown in Fig. 2. The letter number combination after the first underscore in the file name refers to the last two digits of the batch number and the number after x_ refers to the value of x.

Data files labelled TPF at the start refer to pulsed-field magnetisation measurements of (QuinH)2CuBr4∙2H2O (x=0) as shown in Fig. S3. The temperature is given at the end of the data file name.

Within each PF- and TPF- data file, there are two columns headed by Field (T) – applied field of the measurement in units of tesla, and M(Msat) – magnetisation normalised to the saturation magnetisation.

*** MUSR Figs 3+4

MUSR (FIG 3+4): folder "musr"
Data for each concentration is given in a file labelled by x for the low temperature (lt) and high temperature (ht) data shown. Fits to the data sets are in files labelled "fit". 
The frequency (or relaxation rate) is given in the files labelled "freq". For x=1, the stretched exponential fit is also given. Columns are labelled in the files.

Phase diagram (Fig 5): folder "phasediagram"
Data for panel (a) is given in mu_H.dat
Data for panel (b) is given in m.dat
Critical temperatures for panel (c) are given in TN.dat. 

Simulations Figs 6, 7 +9

Fig6.nb:  Mathematica notebook source code used to generate Fig. 6

Fig 7: GLE file (https://glx.sourceforge.io/) for generating this this figure. 

Fig. 9:

fig9\Programs\ ... FreePascal (Lazarus) source code files for programs used to calculate the square-lattice bond percolation data on Fig. 9. "Percolation2D_v4" is the main program to calculate percolation at a given cluster size and substitution probability, "MergeHistograms2" is a post-processing program used to merge multiple output files of "Percolation2D_v4".
fig9\Data\     ... Raw output data of the "Percolation2D_v4" program
fig9\Scripts\  ... Windows batch scripts used to generate the raw output data ("perc2d_test11.bat") and post-process it ("call_merge_hist_average_prev.bat") by calling programs under fig9\Programs\

fig9\merged_avg_prev.out       ... Post-processed data from which the data shown on Fig. 9(a) was extracted
fig9\mean_cluster_size_1st.out ... Mean cluster sizes extracted from (a subset of) the raw output data, and used to generate Fig. 9(b)
