Spin dynamics in the low-dimensional magnet TiOCl

Abstract

We present detailed ESR investigations on single crystals of the low-dimensional quantum magnet TiOCl. The anisotropy of the g-factor indicates a stable orbital configuration below room temperature, and allows to estimate the energy of the first excited state as 0.3(1) eV ruling out a possible degeneracy of the orbital ground state. Moreover, we discuss the possible spin relaxation mechanisms in TiOCl and analyze the angular and temperature dependence of the linewidth up to 250 K in terms of anisotropic exchange interactions. Towards higher temperatures an exponential increase of the linewidth is observed, indicating an additional relaxation mechanism.

10 pages, 8 figures; accepted for publication in Phys. Rev. B

References in corpus (3)

• Incommensurate interactions and non-conventional spin-Peierls transition in TiOBr
• Heat capacity of the quantum magnet TiOCl
• Unusual quasi-one-dimensional electron dispersions in the spin-1/2 quantum magnet TiOCl

Cited by in corpus (8)

• Spin-orbital effects in magnetized quantum wires and spin chains
• Structural and magnetic dimers in the spin-gapped system CuTe2O5
• Dynamical Dzyaloshinsky-Moriya Interaction in KCuF3
• Symmetry disquisition on the TiOX phase diagram
• One-dimensional versus two-dimensional correlation effects in the oxyhalides TiOCl and TiOBr
• Electron Spin Resonance across the Charge-ordering Transition in YBaMn2O6
• Momentum-resolved single-particle spectral function for TiOCl from a combination of density functional and variational cluster calculations
• Chain Formation by Spin Pentamers in eta-Na9V14O35