The antiferromagnetic insulator Ca3FeRhO6: characterization and electronic structure calculations

Details The antiferromagnetic insulator Ca3FeRhO6: characterization and electronic structure calculations The antiferromagnetic insulator Ca3FeRhO6: characterization and electronic structure calculations

2006-10-04

arxiv.org/abs/cond-mat/0610120v1

Phys. Rev. B 75, 115105 (2007) (5 pages)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 6 figures

Scientific paper

10.1103/PhysRevB.75.115105

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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