Capacitance dilatometers possess a parallel plate capacitor with a one stationary plate, and one moveable plate. When the sample length changes, it moves the moveable plate, which in turn changes the gap between the plates. The capacitance is inversely proportional to the gap. Changes in length of 10 pyrometers can be detected (Schmiedeshoff et al., Rev. Sci. Instrum. 77, 123907 (2006)J. J. Neumeier et al., Rev. Sci. Instrum. 79, 033903 (2008), Kuechler et a., Rev. Sci. Instrum. 83, 095102 (2012)).
Images & Sample Data
- A schematic of the capacitive dilatometer. A schematic of the capacitive dilatometer.
- Example of magnetostriction DL/L vs field data obtained with a capacitive dilatometer. Example of magnetostriction DL/L vs field data obtained with a capacitive dilatometer.
P.J.W. Moll, et al, High magnetic-field scales and critical currents in SmFeAs(O,F) crystals, Nat. Mater. 9 (2009) Read online
S.A. Baily, et al, Pseudoisotropic Upper Critical Field in Cobalt-Doped SrFe2As2, Phys. Rev. Lett. 102 (2009) Read online