Phase transitions that produce small length changes (even on the order of nanometers) due to thermal expansion or magnetostriction can be resolved by making contact between the tip of a miniature piezo-resistive cantilever and a sample.
The cantilever is incorporated into a bridge circuit allowing for the measurement of subtle changes in the deflection of the cantilever. The small footprint of the cantilever makes this measurement compatible with small sample spaces where rotation is possible.
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Mun, E.D., et al, Magnetic-field-tuned quantum criticality of the heavy-fermion system YbPtBi, Phys. Rev. B (2013) Read online.
Correa, V.F., et al High-Magnetic-Field Lattice Length Changes in URu2Si2, Phys. Rev. Lett., 109 (24) (2012) Read online.
Schmiedeshoff, G.M., et al Multiple regions of quantum criticality in YbAgGe, Phys. Rev. B, 83 (2011) Read online.
Park, J.-H., et al, High Resolution Miniature Dilatometer Based on an Atomic Force Microscope Piezocantilever, Rev. Sci. Instrum., 80 (2009) Read online.
Correa, V.F., et al, Magnetic-Field-Induced Lattice Anomaly inside the Superconducting State of CeCoIn5: Anisotropic Evidence of the Possible Fulde-Ferrell-Larkin-Ovchinnikov State, Phys. Rev. Lett., 98 (2007) Read online.
Last modified on 26 December 2022