The effect of doped ions on single-molecule magnets of the Mn12-Ac family |
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| Authors: | Zhang Jun-Rong He Lun-Hu Cao Hui-Bo Wang Fang-Wei and Zhang Pan-Lin |
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| Institution: | Laboratoire L\'eon Brillouin, CEA-CNRS, CE-Saclay,
91191 Gif-sur-Yvette, France; State Key Laboratory of Magnetism, Beijing
National Laboratory for Condensed Matter Physics, Institute of Physics,
Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | This paper investigates the single-molecule magnets of pure and
Cr/Fe-doped Mnsingle-molecule magnets,
magnetic anisotropy, macroscopic quantum tunnellingProject supported by the National
Natural Science Foundation of China (Grant Nos 10505029 and
10375088).7550X, 7530G, 7540CThis paper investigates the single-molecule magnets of pure and
Cr/Fe-doped Mnsingle-molecule magnets,
magnetic anisotropy, macroscopic quantum tunnellingProject supported by the National
Natural Science Foundation of China (Grant Nos 10505029 and
10375088).7550X, 7530G, 7540CThis paper investigates the single-molecule magnets of pure and
Cr/Fe-doped Mn$_{12}$-Ac. The components of the mixed crystals are
identified by AC susceptibility technique. The ground-state spin and
anisotropy parameters of doped \mbox{Mn$_{12}$-Ac} are obtained: (i)
\mbox{Mn$_{11}$Cr-Ac} ($S$=19/2, $D$=0.62\,K, $B$=0.0009\,K,
$\De$=63\,K), and (ii) \mbox{Mn$_{11}$Fe-Ac} ($S$=21/2, $D$=0.39\,K,
$B$=0.001\,K, $\De$=55\,K). The single-ion origin of the magnetic
anisotropy is discussed. |
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| Keywords: | single-molecule magnets magnetic anisotropy macroscopic quantum tunnelling |
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