Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2006-01-25
Physics
Condensed Matter
Disordered Systems and Neural Networks
9 pages, 9 figures; submitted to Physical Review B
Scientific paper
10.1088/0953-8984/18/46/007
Aging dynamics of a reentrant ferromagnet stage-2 Cu$_{0.8}$Co$_{0.2}$Cl$_{2}$ graphite intercalation compound has been studied using DC magnetic susceptibility. This compound undergoes successive transitions at the transition temperatures $T_{c}$ ($\approx 8.7$ K) and $T_{RSG}$ ($\approx 3.3$ K). The relaxation rate $S_{ZFC}(t)$ exhibits a characteristic peak at $t_{cr}$ below $T_{c}$. The peak time $t_{cr}$ as a function of temperature $T$ shows a local maximum around 5.5 K, reflecting a frustrated nature of the ferromagnetic phase. It drastically increases with decreasing temperature below $T_{RSG}$. The spin configuration imprinted at the stop and wait process at a stop temperature $T_{s}$ ($
Suzuki Itsuko S.
Suzuki Masatsugu
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