Microwave absorption and magnetization tunneling inMn12-acetate molecular clusters
نویسندگان
چکیده
منابع مشابه
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We have measured the dc magnetization at low temperatures of tetragonal crystals of Mn12 acetate complex @Mn12O12~CH3COO!16~H2O!4#, a material composed of a large ~Avogadro’s! number of identical magnetic molecules, each of spin 10. Exchange coupling between Mn ions within each molecule is very strong, while the interaction between molecules is negligible. A large, uniaxial anisotropy ~;60 K! g...
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The frontier between the classical and quantum worlds can be approached in one of two ways: from the top down or the bottom up. The top-down approach entails starting with an essentially classical variable (e.g. the flux in a superconducting loop, the charge on a small superconducting island or the magnetization of a single-domain magnetic particle) and squeezing down the size of the system (th...
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We investigate the experimental detection of the electromagnetic radiation generated in the fast magnetization reversal in Mn12–acetate at low temperatures. In our experiments we used large single crystals and assemblies of several small single crystals of Mn12–acetate placed inside a cylindrical stainless steel waveguide in which an InSb hot electron device was also placed to detect the radiat...
متن کاملResonant magnetization tunneling in Mn12 acetate: The absence of inhomogeneous hyperfine broadening
We present the results of a detailed study of the thermally assisted-resonant-tunneling relaxation rate of Mn12 acetate as a function of an external, longitudinal magnetic field and find that the data can be fit extremely well to a Lorentzian function. No hint of inhomogeneous broadening is found, even though some is expected from the Mn nuclear hyperfine interaction. This inconsistency implies...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2003
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.67.220402