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Phys Rev Lett. 2007 Feb 2;98(5):057201. Epub 2007 Jan 29.

Will spin-relaxation times in molecular magnets permit quantum information processing?

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Clarendon Laboratory, Department of Physics, University of Oxford, OX1 3PU, United Kingdom.


Using X-band pulsed electron-spin resonance, we report the intrinsic spin-lattice (T1) and phase-coherence (T2) relaxation times in molecular nanomagnets for the first time. In Cr7M heterometallic wheels, with M=Ni and Mn, phase-coherence relaxation is dominated by the coupling of the electron spin to protons within the molecule. In deuterated samples T2 reaches 3 micros at low temperatures, which is several orders of magnitude longer than the duration of spin manipulations, satisfying a prerequisite for the deployment of molecular nanomagnets in quantum information applications.

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