Proton NMR for Measuring Quantum-Level Crossing in the Magnetic Molecular Ring Fe10

Abstract

The proton nuclear spin-lattice relaxation rate 1/T1 has been measured as a function of temperature and magnetic field (up to 15 T) in the molecular magnetic ring Fe10. Striking enhancement of 1/T1 is observed around magnetic field values corresponding to a crossing between the ground state and the excited states of the molecule. We propose that this is due to a cross-relaxation effect between the nuclear Zeeman reservoir and the reservoir of the Zeeman levels of the molecule. This effect provides a powerful tool to investigate quantum dynamical phenomena at level crossing.

Four pages, to appear in Phys.Rev.Lett

References in corpus (4)

• Macroscopic Quantum Coherence in Molecular Magnets
• NMR study of the S=1/2 Heisenberg Ladder Cu2(C5H12N2)2Cl4 : Quantum phase transition and critical dynamics
• Nontrivial resonance of nanoscale uniaxial magnets to alternating field
• Resonant Magnetization Tunneling in Mn12 Acetate: The Absence of Inhomogeneous Hyperfine Broadening

Cited by in corpus (23)

• Magnetic Cluster Excitations
• Effects of frustration on magnetic molecules: a survey from Olivier Kahn till today
• Rotational modes in molecular magnets with antiferromagnetic Heisenberg exchange
• Calculating the energy spectra of magnetic molecules: application of real- and spin-space symmetries
• Electron and Nuclear Spin Dynamics in Antiferromagnetic Molecular Rings
• Quantum rotational band model for the Heisenberg molecular magnet Mo72Fe30
• Low temperature magnetization and the excitation spectrum of antiferromagnetic Heisenberg spin rings
• Quantized antiferromagnetic spin waves in the molecular Heisenberg ring CsFe${}_8$
• Quantum Theory of Molecular Magnetism
• Magnetization and spin dynamics of the spin S=1/2 hourglass nanomagnet Cu5(OH)2(NIPA)4*10H2O
• Heisenberg Dimer Single Molecule Magnets in a Strong Magnetic Field
• Probing spin dynamics and quantum relaxation in LiY0.998Ho0.002F4 via 19F NMR
• Nuclear Magnetic Resonance Reveals Disordered Level-Crossing Physics in the Bose-Glass Regime of the Br-doped Ni(Cl${}_{1-x}$Br${}_x$)${}_2$-4SC(NH${}_2$)${}_2$ Compound at a High Magnetic Field
• Zero-field Time Correlation Functions of Four Classical Heisenberg Spins on a Ring
• Field-induced level crossings in spin clusters: Thermodynamics and magneto-elastic instability
• Competing Bose-Glass physics with disorder-induced Bose-Einstein condensation in the doped $S=1$ antiferromagnet Ni(Cl${}_{1-x}$Br${}_x$)${}_2$-4SC(NH${}_2$)${}_2$ at high magnetic fields
• Study of the ground state and thermodynamic properties of Cu5-NIPA-like molecular nanomagnets
• Theoretical estimates for proton-NMR spin-lattice relaxation rates of heterometallic spin rings
• Huge Transverse Magnetization in the Field-Induced Phase of the Antiferromagnetic Molecular Wheel CsFe8
• Model Exact Low-Lying States and Spin Dynamics in Ferric Wheels; Fe${}_6$ to Fe${}_{12}$
• Exact Time Autocorrelation Function of the N-Spin Classical Heisenberg Equivalent Neighbor Model
• Spin dynamics in molecular ring nanomagnets: Significant effect of acoustic phonons and magnetic anisotropies
• Thermodynamic and magnetocaloric properties of a triangular spin-1/2 cluster with Dzyaloshinskii-Moriya interaction