Metastable and localized Ising magnetism in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi><mml:mo>−</mml:mo><mml:msub><mml:mi mathvariant="normal">CoV</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:math>
 magnetization plateaus

Edwards, L. R.; Lane, Harry; Wallington, F.; Arévalo‐López, Ángel M.; Songvilay, M.; Pachoud, Elise; Niedermayer, Ch.; Tucker, Gregory S.; Manuel, Pascal; Paulsen, C.; Lhotel, Elsa; Attfield, J. Paul; Giblin, Sean; Stock, C.

doi:10.1103/physrevb.102.195136

Cited by 7 publications

(3 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this paper, we address the nature of the magnetic order in CaFe 2 O 4 and offer an explanation for the differing behavior observed in powders and single crystals. The low-temperature A phase is shown to be metastable, with short-range correlations, analogous to the field-induced metastable states recently reported in CoV 2 O 6 [14], in which antiphase boundaries order to form a new phase with a different translational symmetry [15]. These arguments are supported by neutron scattering data at both high and low temperatures, demonstrating the nature of the magnetic fluctuations in single-crystal CaFe 2 O 4 .…”

Section: Introductionsupporting

confidence: 77%

Metastable antiphase boundary ordering in CaFe2O4

et al. 2021

Self Cite

View full text Add to dashboard Cite

CaFe 2 O 4 is an S = 5/2 antiferromagnet exhibiting two magnetic orders that shows regions of coexistence at some temperatures. Using a Green's function formalism, we model neutron scattering data of the spin wave excitations in this material, elucidating the microscopic spin Hamiltonian. In doing so, we suggest that the lowtemperature A phase order (↑↑↓↓) finds its origins in the freezing of antiphase boundaries created by thermal fluctuations in a parent B phase order (↑↓↑↓). The low-temperature magnetic order observed in CaFe 2 O 4 is thus the result of a competition between the exchange coupling along c, which favors the B phase, and the single-ion anisotropy, which stabilizes thermally generated antiphase boundaries, leading to static metastable A phase order at low temperatures.

show abstract

Section: Introductionsupporting

confidence: 77%

Metastable antiphase boundary ordering in CaFe2O4

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this paper, we address the nature of the magnetic or-der in CaFe 2 O 4 and offer an explanation for the differing behavior observed in powders and single crystals. The low temperature A phase is shown to be metastable, with short range correlations, analogous to the field-induced metastable states recently reported in CoV 2 O 6 [14], in which antiphase boundaries order to form a new phase with a different translational symmetry [15]. These arguments are supported by neutron scattering data at both high and low temperatures, demonstrating the nature of the magnetic fluctuations in single crystal CaFe 2 O 4 .…”

Section: Introductionsupporting

confidence: 76%

Metastable antiphase boundary ordering in CaFe$_{2}$O$_{4}$

Lane,

Rodriguez,

Walker

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

CaFe2O4 is an S = 5/2 antiferromagnet exhibiting two magnetic orders which shows regions of coexistence at some temperatures. Using a Green's function formalism, we model neutron scattering data of the spin wave excitations in this material, ellucidating the microscopic spin Hamiltonian. In doing so, we suggest that the low temperature A phase order (↑↑↓↓) finds its origins in the freezing of antiphase boundaries created by thermal fluctuations in a parent B phase order (↑↓↑↓). The low temperature magnetic order observed in CaFe2O4 is thus the result of a competition between the exchange coupling along c, which favors the B phase, and the single-ion anisotropy which stabilizes thermally-generated antiphase boundaries, leading to static metastable A phase order at low temperatures.

show abstract

“…energetically separated from other single-ion levels and is a valid approximation in many compounds with an orbital degeneracy [74][75][76][77][78] where spin-orbit coupling is a perturbation and is parameterized through anisotropic terms [79]. With the presence of spin-orbit coupling of a similar magnitude to the exchange coupling, as in VI 3 , this approach is not valid due to the mixing (Fig.…”

mentioning

confidence: 99%

Two-dimensional ferromagnetic spin-orbital excitations in the honeycomb VI$_{3}$

Lane,

Pachoud,

Rodriguez-Rivera

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

VI3 is a ferromagnet with planar honeycomb sheets of bonded V 3+ ions held together by van der Waals forces. We apply neutron spectroscopy to measure the two dimensional (J/Jc ≈ 17) magnetic excitations in the ferromagnetic phase, finding two energetically gapped (∆ ≈ kBTc ≈ 55 K) and dispersive excitations. We apply a multi-level spin wave formalism to describe the spectra in terms of two coexisting domains hosting differing V 3+ orbital ground states built from contrasting distorted octahedral environments. This analysis fits a common nearest neighbor in-plane exchange coupling (J=-8.6 ± 0.3 meV) between V 3+ sites. The distorted local crystalline electric field combined with spin-orbit coupling provides the needed magnetic anisotropy for spatially long-ranged twodimensional ferromagnetism in VI3.

show abstract

Metastable and localized Ising magnetism in α−CoV2O6 magnetization plateaus

Cited by 7 publications

References 81 publications

Metastable antiphase boundary ordering in CaFe2O4

Metastable antiphase boundary ordering in CaFe2O4

Metastable antiphase boundary ordering in CaFe$_{2}$O$_{4}$

Two-dimensional ferromagnetic spin-orbital excitations in the honeycomb VI$_{3}$

Contact Info

Product

Resources

About