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Magnetic structure of antiferromagnetic NdRhIn5

S. Chang, P. G. Pagliuso, Wei Bao, J. S. Gardner, I. P. Swainson, J. L. Sarrao, H. Nakotte

cond-mat.str-elarXiv:cond-mat/0206381

Abstract

The magnetic structure of antiferromagnetic NdRhIn5 has been determined using neutron diffraction. It has a commensurate antiferromagnetic structure with a magnetic wave vector (1/2,0,1/2) below TN = 11K. The staggered Nd moment at 1.6K is 2.6muB aligned along the c-axis. We find the magnetic structure to be closely related to that of its cubic parent compound NdIn3 below 4.6K. The enhanced TN and the absence of additional transitions below TN for NdRhIn5 are interpreted in terms of an improved matching of the crystalline-electric-field (CEF), magnetocrystalline, and exchange interaction anisotropies. In comparison, the role of these competing anisotropies on the magnetic properties of the structurally related compound CeRhIn5 is discussed.

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