Ordered Magnetism in the Intrinsically Decorated jeff = 1/2 α-CoV3O8

Published

December 6, 2018

Author(s)

P. M. Sarte, A. M. Arevalo-Lopez, M. Songvilay, D. Le, T. Guidi, V. Garcia-Sakai, S. Mukhopadhyay, S. C. Capelli, William D. Ratcliff, K. H. Hong, G. M. McNally, E. Pachoud, J. P. Attfield, C. Stock

Abstract

The zero field structural and dynamic properties of the mixed valence ternary oxide α-CoV₃O₈ has been investigated using a combination of diffraction, DC susceptibility and inelastic neutron scattering measurements. The low temperature magnetic properties are consistent with a random macroscopic distribution of j_eff = 1/2 Co²⁺ over the 16k metal sites with evidence for local ordering. Co²⁺ cations exhibit Ising anisotropy and are coupled via a 3D network composed of competing weaker ferro intra- and stronger antiferromagnetic interplanar superexchange, giving rise to long range antiferromagnetic order at T_N 19 K. We identify similarities between α-CoV₃O₈ and dilute 3D Ising antiferromagnets. Such a comparison suggests that α-CoV₂O₈ may represent a non-doped analogy to random dilute 3D Ising antiferromagnets.

Citation

Physical Review B

Volume

98

Issue

22

Pub Type

Journals

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Keywords

magnetism, neutron, ising

Citation

Sarte, P. , Arevalo-Lopez, A. , Songvilay, M. , Le, D. , Guidi, T. , Garcia-Sakai, V. , Mukhopadhyay, S. , Capelli, S. , Ratcliff, W. , Hong, K. , McNally, G. , Pachoud, E. , Attfield, J. and Stock, C. (2018), Ordered Magnetism in the Intrinsically Decorated j_eff = 1/2 α-CoV₃O₈, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=926016 (Accessed October 9, 2024)