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arXiv · 1703.10319

Determination of the magnetic structure of CePt$_2$In$_7$ by means of neutron diffraction

M. Raba·E. Ressouche·N. Qureshi·C. V. Colin·V. Nassif·S. Ota·Y. Hirose·R. Settai·P. Rodière·I. Sheikin
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Abstract

The magnetic structure of the heavy fermion antiferromagnet CePt$_2$In$_7$ is determined using neutron diffraction. We find a magnetic wave vector $\mathbf{q}_M = (1/2,1/2,1/2)$, which is temperature independent up to $T_N =$ 5.5 K. A staggered moment of 0.45(1)$μ_B$ at 2 K resides on the Ce ion. The nearest-neighbor moments in the tetragonal basal plane are aligned antiferromagnetically. The moments rotate by 90$^\circ$ from one CeIn$_3$ plane to another along the $c$ axis. A much weaker satellite peak with an incommensurate magnetic wave vector $\mathbf{q}_M = (1/2,1/2,0.47)$ seems to develop at low temperature. However, the experimental data available so far are not sufficient to draw a definitive conclusion about the possible co-existence of commensurate and incommensurate magnetic structures in this material.

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M. Raba, E. Ressouche, N. Qureshi, C. V. Colin, V. Nassif, S. Ota, Y. Hirose, R. Settai, P. Rodière, I. Sheikin. 2017-03-30. Determination of the magnetic structure of CePt$_2$In$_7$ by means of neutron diffraction. https://doi.org/10.1103/physrevb.95.161102

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