The field, H less-than-or-equal-to 5 T, and temperature, T greater-tha
n-or-equal-to 2 K, dependence of the remanent magnetization mu of the
diluted Ising antiferromagnet Fe0.6Zn0.4F2 has been investigated utili
zing a superconducting quantum interference device magnetometer. The r
esults at low temperatures, where there is no growth of random field d
omains after the field removal, are analyzed according to mu = AH(x)(T
ln t/t0)-PSI + B, where the two terms are domain wall and volume cont
ributions to the remanent magnetization, respectively. It is found tha
t PSI decreases continuously with decreasing temperature, and reaches
a value of almost-equal-to 0.15 at 3 K. The field exponent x is found
to decrease with increasing temperature, attaining values between 2 an
d 3. The results show a more complex behavior of the low-temperature r
emanent magnetization than a model proposed by Nattermann and Vilfan w
hich predicts constant values of the exponents: PSI almost-equal-to 0.
4 and x almost-equal-to 2.