set size 0.7,0.7
set multiplot
set xlabel "r/d_S"
set ylabel "Mean force"
set xrange[8:15]
set yrange[-110:20]
set xtics 1
set ytics 20
set xzeroaxis lt -1
set key 14.2,-10
p"pmfbibun0"ti"{/Symbol F}_M = 0.000"wi lines,"pmfbibun30"ti"0.015"wi lines,"pmfbibun60"ti"0.030"wi lines,"pmfbibun90"ti"0.045"wi lines,"pmfbibun120"ti"0.060"wi lines
set xlabel ""
set ylabel ""
set size 0.28,0.28
set origin 0.15,0.1
set xrange[8:8.01]
set yrange[-105:-80]
set xtics 0.005
set ytics 10
p"pmfbibun0"ti""wi lines,"pmfbibun30"ti""wi lines,"pmfbibun60"ti""wi lines,"pmfbibun90"ti""wi lines,"pmfbibun120"ti""wi lines
set origin 0.4,0.1
set xrange[11.95:12.1]
set yrange[-20:5]
set xtics 0.05
set ytics 10
replot