Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Resonant torsion magnetometry in anisotropic quantum materials

There are no MPG-Authors in the publication available
External Resource
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Modic, K. A., Bachmann, M. D., Ramshaw, B. J., Arnold, F., Shirer, K. R., Estry, A., et al. (2018). Resonant torsion magnetometry in anisotropic quantum materials. Nature Communications, 9: 3975. doi:10.1038/s41467-018-06412-w.

Cite as: https://hdl.handle.net/21.11116/0000-000B-7846-0
Unusual behavior in quantum materials commonly arises from their effective low-dimensional physics, reflecting the underlying anisotropy in the spin and charge degrees of freedom. Here we introduce the magnetotropic coefficient k = ∂2F/∂θ2, the second derivative of the free energy F with respect to the magnetic field orientation θ in the crystal. We show that the magnetotropic coefficient can be quantitatively determined from a shift in the resonant frequency of a commercially available atomic force microscopy cantilever under magnetic field. This detection method enables part per 100 million sensitivity and the ability to measure magnetic anisotropy in nanogram-scale samples, as demonstrated on the Weyl semimetal NbP. Measurement of the magnetotropic coefficient in the spin-liquid candidate RuCl3 highlights its sensitivity to anisotropic phase transitions and allows a quantitative comparison to other thermodynamic coefficients via the Ehrenfest relations.