Magnetic and structural properties of Ni-substituted magnetoelectric 
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Papi, Hadi; Favre, Virgile; Ahmadvand, Hossein; Alaei, Mojtaba; Khondabi, Mohammad; Sheptyakov, Denis; Keller, L.; Kameli, P.; Živković, Ivica; Rønnow, Henrik M.

doi:10.1103/physrevb.100.134408

Cited by 17 publications

(18 citation statements)

References 33 publications

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“…We use a combined fit to describe C p and the volume of the unit cell obtained from x-ray diffraction by a phonon (lattice only) model. Similar to what was done in [39,40], the lattice contribution to the specific heat is given by…”

Section: B Specific Heatmentioning

confidence: 96%

Ferrimagnetic 120∘magnetic structure inCu2OSO4

Favre¹,

Tucker²,

Ritter³

et al. 2020

Phys. Rev. B

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Section: B Specific Heatmentioning

confidence: 96%

Ferrimagnetic 120∘magnetic structure inCu2OSO4

Favre¹,

Tucker²,

Ritter³

et al. 2020

Phys. Rev. B

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“…We use a combined fit to describe the C p and the volume of the unit cell obtained from x-ray diffraction by a phonon (lattice only) model. Similarly to what has been done in 40,41 , the lattice contribution to the specific heat is given by C p = C D + i C E,i with :…”

Section: B Specific Heatmentioning

confidence: 98%

Ferrimagnetic 120$^\circ$ magnetic structure in Cu2OSO4

Favre,

Tucker,

Ritter

et al. 2020

Preprint

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We report magnetic properties of a 3d 9 (Cu 2+ ) magnetic insulator Cu2OSO4 measured on both powder and single crystal. The magnetic atoms of this compound form layers, whose geometry can be described either as a system of chains coupled through dimers or as a Kagomé lattice where every 3rd spin is replaced by a dimer. Specific heat and DC-susceptibility show a magnetic transition at 20 K, which is also confirmed by neutron scattering. Magnetic entropy extracted from the specific heat data is consistent with a S = 1/2 degree of freedom per Cu 2+ , and so is the effective moment extracted from DC-susceptibility. The ground state has been identified by means of neutron diffraction on both powder and single crystal and corresponds to a ∼ 120 degree spin structure in which ferromagnetic intra-dimer alignment results in a net ferrimagnetic moment. No evidence is found for a change in lattice symmetry down to 2 K. Our results suggest that Cu2OSO4 represents a new type of model lattice with frustrated interactions where interplay between magnetic order, thermal and quantum fluctuations can be explored.

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“…That is why, relaxation in the dielectric behavior is observed. Furthermore, the Curie−Weiss fitting of the dc magnetization from high temperature does not follow the magnetization curve at temperature lower than 150 K. 16,28 In addition, heat capacity measurement by Papi et al 51 shows that the magnetic contribution in heat capacity persists until 100 K much higher than T N along with a peak around 27 K (T N ) and a cusp-like feature around 50 K. These observations support that the dielectric relaxation around 60 to 120 K is due to the lattice distortion mediated by spin-phonon coupling. Similar results were reported in geometrically frustrated spin chain system Ca 3 Co 2 O 6 because of the lattice distortion and presence of magnetic interactions well above the T N .…”

Section: ■ Experimental Techniquesmentioning

confidence: 99%

Temperature-Dependent Structural, Dielectric, and Raman Spectroscopy Studies on Magnetoelectric Co₄Nb₂O₉

et al. 2022

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Co 4 Nb 2 O 9 (CNO) is one of the interesting magnetoelectric materials. Here, we report comprehensive temperature-dependent structural, phonon, dielectric, and magnetic properties of CNO. In contrast to most of the earlier reports, a clear transition (upturn feature) is observed in temperature-dependent dielectric measurements at the antiferromagnetic ordering (T N ) ∼27.2 K, even in the absence of magnetic field. The upturn-like feature at T N (in zero magnetic field) becomes a sharp peak above the critical magnetic field. The isothermal magnetodielectric (MD) results infer magnetic field-induced transition below T N with nonlinear behavior. The maximum MD effect (∼4%) is observed at T N at 80 kOe. The terahertz measurements exhibit spin excitation mode below T N in the absence of magnetic field. The temperature-dependent synchrotron X-ray diffraction results demonstrate that the crystal structure of CNO remained P3̅ c1 down to 12 K; however, small distortion in the lattice is observed at T N . The temperature-dependent Raman measurements infer an unusual phonon shift and line width of optical phonons below T N . These results illustrate that CNO exhibits dielectric transition even in the absence of magnetic field and exhibit magnetoelastic coupling. The correlation in these order parameters is also discussed.

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Magnetic and structural properties of Ni-substituted magnetoelectric Co4Nb2O9

Cited by 17 publications

References 33 publications

Ferrimagnetic 120∘magnetic structure inCu2OSO4

Ferrimagnetic 120∘magnetic structure inCu2OSO4

Ferrimagnetic 120$^\circ$ magnetic structure in Cu2OSO4

Temperature-Dependent Structural, Dielectric, and Raman Spectroscopy Studies on Magnetoelectric Co₄Nb₂O₉

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Magnetic and structural properties of Ni-substituted magnetoelectric Co4Nb2O9

Cited by 17 publications

References 33 publications

Ferrimagnetic 120∘magnetic structure inCu2OSO4

Ferrimagnetic 120∘magnetic structure inCu2OSO4

Ferrimagnetic 120$^\circ$ magnetic structure in Cu2OSO4

Temperature-Dependent Structural, Dielectric, and Raman Spectroscopy Studies on Magnetoelectric Co4Nb2O9

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Product

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Temperature-Dependent Structural, Dielectric, and Raman Spectroscopy Studies on Magnetoelectric Co₄Nb₂O₉