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Effect of applied orthorhombic lattice distortion on the antiferromagnetic phase of CeAuSb2

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Park,  Joonbum
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

Park, J., Sakai, H., Erten, O., Mackenzie, A. P., & Hicks, C. W. (2018). Effect of applied orthorhombic lattice distortion on the antiferromagnetic phase of CeAuSb2. Physical Review B, 97(2): 024411, pp. 1-6. doi:10.1103/PhysRevB.97.024411.


Cite as: http://hdl.handle.net/21.11116/0000-0000-3963-1
Abstract
We study the response of the antiferromagnetism of CeAuSb2 to orthorhombic lattice distortion applied through in-plane uniaxial pressure. The response to pressure applied along a < 110 > lattice direction shows a first-order transition at zero pressure, which shows that the magnetic order spontaneously lifts the (110)/(1 (1) over bar0) symmetry of the unstressed lattice. Sufficient < 100 > pressure appears to rotate the principal axes of the order from < 110 > to < 100 >. At low < 100 > pressure, the transition at T-N is weakly first order; however, it becomes continuous above a threshold < 100 > pressure. We discuss the possibility that this behavior is driven by order parameter fluctuations, with the restoration of a continuous transition being a result of reducing the point-group symmetry of the lattice.