Single crystal study of the heavy-fermion antiferromagnet CePt2In7

Tobash, P. H.; Ronning, F.; Thompson, J. D.; Scott, B. L.; Moll, P. J. W.; Batlogg, B.; Bauer, E. D.

doi:10.1088/0953-8984/24/1/015601

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Single crystal study of the heavy-fermion antiferromagnet CePt₂In₇

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https://doi.org/10.1088/0953-8984/24/1/015601
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Tobash, P. H., Ronning, F., Thompson, J. D., Scott, B. L., Moll, P. J. W., Batlogg, B., et al. (2012). Single crystal study of the heavy-fermion antiferromagnet CePt₂In₇. Journal of Physics: Condensed Matter, 24(1): 015601. doi:10.1088/0953-8984/24/1/015601.

Cite as: https://hdl.handle.net/21.11116/0000-000B-7974-B

Abstract

We report the synthesis, structure, and physical properties of single crystals of CePt₂In₇. Single crystal x-ray diffraction analysis confirms the tetragonal I4/mmm structure of CePt₂In₇ with unit cell parameters a = 4.5886(6) Å, c = 21.530(6) Å and V = 453.32(14) Å³. The magnetic susceptibility, heat capacity, Hall effect and electrical resistivity measurements are all consistent with CePt₂In₇ undergoing an antiferromagnetic order transition at T_N = 5.5 K, which is field independent up to 9 T. Above T_N, the Sommerfeld coefficient of specific heat is γ ≈ 300 mJ mol⁻¹ K⁻², which is characteristic of an enhanced effective mass of itinerant charge carriers. The electrical resistivity is typical of heavy-fermion behavior and gives a residual resistivity ρ₀ ∼ 0.2 µΩ cm, indicating good crystal quality. CePt₂In₇ also shows moderate anisotropy of the physical properties that is comparable to structurally related CeMIn₅ (M = Co, Rh, Ir) heavy-fermion superconductors.