Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 9, Pages 1994-1997Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.1994
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The dynamic susceptibility study of photoinduced magnetism in a molecule-based magnet, K1-2xCo1+x[Fe(CN)(6)]. yH(2)O (0.2 less than or equal to x less than or equal to 0.4, y similar to 5), is reported. Upon excitation with visible light the material has substantial changes in linear and nonlinear ac susceptibility and de magnetization. The results demonstrate cooperative freezing of magnetic moments and absence of true long-range magnetic order. The ground and photoexcited states are described within a cluster glass model, with photoinduced increase in spin concentration leading to a shift of the dynamics to longer length and time scales and higher temperatures.
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