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Issue 5, 2008
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Electron spin–lattice and spin–spin relaxation study of a trinuclear iron(iii) complex and its relevance in quantum computing

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Abstract

Electron spins of molecular magnets are promising candidates for large scale quantum information processing because they exhibit a large number of low-lying excited states. In this paper X-band pulse electron paramagnetic resonance spectroscopy is used to determine the intrinsic relaxation times T1 and T2 of a molecular magnet with an S = 1/2 ground state, namely the neutral trinuclear oxo-centered iron(III) complex, [Fe33-O)(O2CPh)5(salox)(EtOH)(H2O)]. The temperature dependence of the spin–lattice relaxation time T1 between 4.5 and 11 K shows that the Orbach relaxation process is dominant with the first excited state lying 57 cm−1 above the ground state, whereas the phase memory time TM is of the order of 2.6 µs and exhibits a modest temperature dependence. These results together with previous magnetic measurements give further insight into the magnetic properties of the complex. The coherent manipulation of the electron spins is also examined by means of transient nutation experiments.

Graphical abstract: Electron spin–lattice and spin–spin relaxation study of a trinuclear iron(iii) complex and its relevance in quantum computing

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Publication details

The article was received on 19 Jul 2007, accepted on 31 Oct 2007 and first published on 14 Nov 2007


Article type: Paper
DOI: 10.1039/B711056A
Phys. Chem. Chem. Phys., 2008,10, 743-748

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    Electron spin–lattice and spin–spin relaxation study of a trinuclear iron(III) complex and its relevance in quantum computing

    G. Mitrikas, Y. Sanakis, C. P. Raptopoulou, G. Kordas and G. Papavassiliou, Phys. Chem. Chem. Phys., 2008, 10, 743
    DOI: 10.1039/B711056A

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