Magnetic and microwave studies of high-spin states of single-molecule magnet Ni 4

Enrique Del Barco, Andrew D. Kent, En Che Yang, David N. Hendrickson

    Research output: Contribution to journalArticle

    Abstract

    Quantum tunneling of the magnetization in a single-molecule magnet has been studied in experiments that combine microwave spectroscopy (10-50 GHz) with low temperature high sensitivity micro-Hall effect magnetometry (T = 0.4 K). This method enables the monitoring of spin-state populations in the presence of microwave radiation and a direct measure of the energy splitting between low lying high-spin states. We present results that show the level repulsion between such states as a function of magnetic field in the SMM Ni 4 (S = 4), which clearly indicates the formation of high-spin superposition states. The absorption linewidths provide a lower bound on the transverse relaxation time (τ 2) or decoherence time of these superposition states of ∼0.5 ns. Studies as a function of microwave power and magnetic field sweep rate suggest that the energy relaxation rate decreases with increasing longitudinal field and energy splitting between states.

    Original languageEnglish (US)
    Pages (from-to)2695-2700
    Number of pages6
    JournalPolyhedron
    Volume24
    Issue number16-17
    DOIs
    StatePublished - Nov 17 2005

    Fingerprint

    Magnets
    Microwaves
    magnets
    Microwave spectroscopy
    Magnetic Fields
    Magnetic fields
    microwaves
    Molecules
    Hall effect
    Magnetometry
    Linewidth
    Relaxation time
    molecules
    Magnetization
    magnetic fields
    magnetic measurement
    energy
    Monitoring
    Spectrum Analysis
    relaxation time

    Keywords

    • Electron paramagnetic resonance
    • Magnetometry
    • Nanomagnet
    • Quantum computing
    • Quantum tunneling of magnetization
    • Single-molecule magnet
    • Superparamagnet

    ASJC Scopus subject areas

    • Biochemistry
    • Inorganic Chemistry
    • Physical and Theoretical Chemistry
    • Materials Chemistry

    Cite this

    Del Barco, E., Kent, A. D., Yang, E. C., & Hendrickson, D. N. (2005). Magnetic and microwave studies of high-spin states of single-molecule magnet Ni 4 . Polyhedron, 24(16-17), 2695-2700. https://doi.org/10.1016/j.poly.2005.03.137

    Magnetic and microwave studies of high-spin states of single-molecule magnet Ni 4 . / Del Barco, Enrique; Kent, Andrew D.; Yang, En Che; Hendrickson, David N.

    In: Polyhedron, Vol. 24, No. 16-17, 17.11.2005, p. 2695-2700.

    Research output: Contribution to journalArticle

    Del Barco, E, Kent, AD, Yang, EC & Hendrickson, DN 2005, 'Magnetic and microwave studies of high-spin states of single-molecule magnet Ni 4 ', Polyhedron, vol. 24, no. 16-17, pp. 2695-2700. https://doi.org/10.1016/j.poly.2005.03.137
    Del Barco, Enrique ; Kent, Andrew D. ; Yang, En Che ; Hendrickson, David N. / Magnetic and microwave studies of high-spin states of single-molecule magnet Ni 4 . In: Polyhedron. 2005 ; Vol. 24, No. 16-17. pp. 2695-2700.
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