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Magnetic Ground States And Magnetodielectric Effect In Rcr(bo3)(2) (r = Y And Ho)

Title: Magnetic Ground States And Magnetodielectric Effect In Rcr(bo3)(2) (r = Y And Ho).
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Name(s): Sinclair, R., author
Zhou, H. D., author
Lee, M., author
Choi, S., author
Li, G., author
Hong, T., author
Calder, S., author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2017-05-08
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The layered perovskites RCr(BO3)(2) (R = Y and Ho) with magnetic triangular lattices were studied by performing ac/dc susceptibility, specific heat, elastic and inelastic neutron scattering, and dielectric constant measurements. The results show (i) both samples' Cr3+ spins order in a canted antiferromagnetic structure with TN around 8-9 K, while the Ho3+ ions do not order down to T = 1.5 K in HoCr(BO3)(2); (ii) when a critical magnetic field HC around 2-3 T is applied below TN, the Cr3+ spins in the Y compound and both the Cr3+ and Ho3+ spins in the Ho compound order in a ferromagnetic state; (iii) both samples exhibit dielectric constant anomalies around the transition temperature and critical field, but the Ho compound displays a much stronger magnetodielectric response. We speculate that this is due to the magnetostriction, which depends on both the Cr3+ and the Ho3+ ions' ordering in the Ho compound. Moreover, by using linear spin-wave theory to simulate the inelastic neutron scattering data, we estimated the Y compound's intralayer and interlayer exchange strengths as ferromagnetic J(1) = -0.12 meV and antiferromagnetic J(2) = 0.014 meV, respectively. The competition between different kinds of superexchange interactions results in the ferromagnetic intralayer interaction.
Identifier: FSU_libsubv1_wos_000401223700002 (IID), 10.1103/PhysRevB.95.174410 (DOI)
Keywords: frustrated magnets, antiferromagnets, bilbao crystallographic server, ferroelectricity, lufe2o4, multiferroics, ndcrtio5, rbfe(moo4)(2), triangular lattice
Publication Note: The publisher's version of record is available at https://doi.org/10.1103/PhysRevB.95.174410
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000401223700002
Owner Institution: FSU
Is Part Of: Physical Review B.
2469-9950
Issue: iss. 17, vol. 95

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Sinclair, R., Zhou, H. D., Lee, M., Choi, S., Li, G., Hong, T., & Calder, S. (2017). Magnetic Ground States And Magnetodielectric Effect In Rcr(bo3)(2) (r = Y And Ho). Physical Review B. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000401223700002