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A tunable stress dilatometer and measurement of the thermal expansion under uniaxial stress of Mn3Sn

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Shirer,  Kent R.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Yang,  Po-Ya
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Mackenzie,  Andrew P.
Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Hicks,  Clifford W.
Clifford Hicks, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Ikhlas, M., Shirer, K. R., Yang, P.-Y., Mackenzie, A. P., Nakatsuji, S., & Hicks, C. W. (2020). A tunable stress dilatometer and measurement of the thermal expansion under uniaxial stress of Mn3Sn. Applied Physics Letters, 117(23): 233502, pp. 1-6. doi:10.1063/5.0029198.


Cite as: https://hdl.handle.net/21.11116/0000-0007-A9C4-D
Abstract
We present a method for measuring thermal expansion under tunable uniaxial stresses and show measurements of the thermal expansion of Mn3Sn, a room temperature antiferromagnet that exhibits a spontaneous Hall effect, under uniaxial stresses of up to 1.51GPa compression. The measurement of thermal expansion provides thermodynamic data about the nature of phase transitions, and uniaxial stress provides a powerful tuning method that does not introduce disorder. Mn3Sn exhibits an anomaly in its thermal expansion near similar to 270K, associated with a first-order change in its magnetic structure. We show that this transition temperature is suppressed by 54.6K by 1.51GPa compression along [0001]. We find the associated entropy change at the transition to be similar to 0.1J mol(-1) K-1 and to vary only weakly with applied stress.