R.H. Koch, R.B. Laibowitz, et al.
Physical Review B
Using a novel magnetometer technique probing a (15-m)3 volume of a sample directly on top of a dc-SQUID chip with integrated pickup loops and field coils, we measure simultaneously the magnetic fluctuation noise and the ac susceptibility of a spin-glass, Eu0.4Sr0.6S, as a function of temperature. The data demonstrate directly the validity of the fluctuation-dissipation theorem both above and below the freezing temperature. New results on low-frequency dynamics are presented for this sample. © 1986 The American Physical Society.
R.H. Koch, R.B. Laibowitz, et al.
Physical Review B
L. Krusin-Elbaum, A.P. Malozemoff, et al.
Physical Review B
B. Özyilmaz, A.D. Kent, et al.
Physical Review Letters
A.P. Malozemoff, J.P. Jamet, et al.
IEEE Transactions on Magnetics