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The antiferromagnetic insulator Ca3FeRhO6: characterization and electronic structure calculations

V. Eyert·U. Schwingenschloegl·R. Fresard·A. Maignan·C. Martin·N. Nguyen·C. Hackenberger·T. Kopp
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Abstract

We investigate the antiferromagnetic insulating nature of Ca3FeRhO6 both experimentally and theoretically. Susceptibility measurements reveal a Neel temperature T_N = 20 K, and a magnetic moment of 5.3 muB/f. u., while Moessbauer spectroscopy strongly suggests that the Fe ions, located in trigonal prismatic sites, are in a 3+ high spin state. Transport measurements display a simple Arrhenius law, with an activation energy of 0.2 eV. The experimental results are interpreted with LSDA band structure calculations, which confirm the Fe 3+ state, the high-spin/low-spin scenario, the antiferromagnetic ordering, and the value for the activation energy.

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V. Eyert, U. Schwingenschloegl, R. Fresard, A. Maignan, C. Martin, N. Nguyen, C. Hackenberger, T. Kopp. 2006-10-04. The antiferromagnetic insulator Ca3FeRhO6: characterization and electronic structure calculations. https://doi.org/10.1103/physrevb.75.115105

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