R.H. Koch, V. Foglietti, et al.
Applied Physics Letters
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, V. Foglietti, et al.
Applied Physics Letters
Y. Lu, P.L. Trouilloud, et al.
Journal of Applied Physics
A.P. Malozemoff, J.C. Slonczewski
Physical Review Letters
S.I. Woods, Nesco M. Lettsome, et al.
ISTFA 2003