Investigation of the magnetic dipole field at the atomic scale in quasi-one-dimensional paramagnetic conductor Li 0.9 Mo 6 O 17
Document Type
Article
Publication Date
1-13-2016
Abstract
We report magnetic dipole field investigation at the atomic scale in a single crystal of quasi-one-dimensional (Q1D) paramagnetic conductor Li 0.9 Mo 6 O 17 , using a paramagnetic electron model and 7 Li-NMR spectroscopy measurements with an externally applied magnetic field B 0 = 9 T. We find that the magnetic dipole field component () parallel to B 0 at the Li site from the Mo electrons has no lattice axial symmetry; it is small around the middle between the lattice a and c axes in the ac-plane with the minimum at the field orientation angle , while the maximum is at when B 0 is applied perpendicular to b (), where represents the direction of . Further estimation indicates that has a maximum value of 0.35 G at B 0 = 9 T. By minimizing the potential magnetic contributions to the NMR spectra satellites with the NMR spectroscopy measurements at the direction where the value of the magnetic dipole field component is ?0, the behavior of the electron charge statics is exhibited. This work demonstrates that the magnetic dipole field of the Mo electrons is the dominant source of the local magnetic fields at the Li site, and suggests that the unknown metal-'insulator' crossover at low temperatures is not a charge effect. The work also reveals valuable local electric and magnetic field information for further NMR investigation as recently suggested (2012 Phys. Rev. B 85 235128) regarding the unusual properties of the material.
Recommended Citation
Wu, Guoqing; Ye, Xiao Shan; Zeng, Xianghua; Wu, Bing; and Clark, W. G., "Investigation of the magnetic dipole field at the atomic scale in quasi-one-dimensional paramagnetic conductor Li 0.9 Mo 6 O 17" (2016). College of Health, Science, and Technology. 1055.
https://digitalcommons.uncfsu.edu/college_health_science_technology/1055