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Magnetic ordering induced ferroelectricity in α-Cu 2 V 2 O 7 studied through non-magnetic Zn doping
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TLDR
In this paper, the magnetic and electronic properties of Cu2-xZnxV2O7 were studied by magnetization, specific heat, and dielectric measurements, and it was shown that magneto-electric coupling is nonlinear in nature, which is in agreement with the Landau theory of continuous phase transition.Abstract:
We have studied the magnetic and electronic properties of Cu2-xZnxV2O7 by magnetization, specific heat, and dielectric measurements. X-ray structural analysis shows a Zn-mediated phase transition from the α- to the β-phase beyond a critical Zn concentration of xc = 0.15. While Cu2V2O7 exhibits a canted antiferromagnetism with an associated weak ferromagnetism in the α-phase, the β-phase is purely antiferromagnetic. The spin canting arises due to the Dzyaloshinskii-Moriya exchange interaction in the anti-symmetric α-phase. The temperature dependence of the heat capacity for the sample in the α-phase shows a clear lambda like transition at a temperature where the magnetic susceptibility also displays an anomaly and indicates an onset of long range magnetic ordering. Dielectric properties display a clear anomaly around the magnetic transition temperature in α-Cu2V2O7. The anomaly weakens with the increase in the Zn concentration and disappears at the doping level where α to β phase transition occurs. This confirms the existence of magneto-electric coupling in α-Cu2V2O7 but not in its β-phase. Analysis of the experimental data shows that magneto-electric coupling is non-linear in nature, which is in agreement with the Landau theory of continuous phase transition. So, α-Cu2V2O7 establishes itself as a promising candidate for magnetic multiferroics.read more
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Spin Seebeck effect in the polar antiferromagnet α − Cu 2 V 2 O 7
Yuki Shiomi,Rina Takashima,Daisuke Okuyama,G. Gitgeatpong,P. Piyawongwatthana,Kittiwit Matan,T. J. Sato,Eiji Saitoh +7 more
TL;DR: In this paper, the authors experimentally observed the spin Seebeck effect (SSE) in the polar antiferromagnet and found that the magnon scattering plays an important role in the SSE.
Journal ArticleDOI
Cobalt-doped copper vanadate: a dual active electrocatalyst propelling efficient H2 evolution and glycerol oxidation in alkaline water
TL;DR: In this paper , a series of 10% Co(ii)-doped CuV (Co10%-CuV) samples were developed with varying cobalt(ii) doping concentrations deploying a relatively simple solid state synthetic procedure.
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High-field magnetization and electronic spin resonance study in the twisted honeycomb lattice α-Mn<sub>2</sub>V<sub>2</sub>O<sub>7</sub>
TL;DR: In this article , the authors report the single-crystal growth of Mn 2 V 2 O 7 and the results of magnetic susceptibility, high-field magnetization up to 55 T and high-frequency electric spin resonance (ESR) measurements for its low-temperature α phase.
Journal ArticleDOI
Effect of Co and Mg doping at Cu site on structural, magnetic and dielectric properties of α-Cu2V2O7.
Abja Keshar Kar,Bidisa Chattopadhyay,Ratnadwip Singha,A. Barman,Azaharuddin Ahmed,A. Midya,Sudipta Bandyopadhyay,Devajyoti Mukherjee,Debnarayan Jana,Prabhat Mandal +9 more
TL;DR: In this article, the effect of doping of both magnetic (Co) and nonmagnetic (Mg) ions at the Cu site on phase transition in polycrystalline α-Cu2V2O7 through structural, magnetic, and electrical measurements was studied.
Journal ArticleDOI
Photoelectrochemical properties of copper pyrovanadate (Cu2V2O7) thin films synthesized by pulsed laser deposition
Jean-François Blach,C. Mathieu,Pascal Roussel,Ahmad I. Ayesh,Adlane Sayede,Sébastien Saitzek +5 more
TL;DR: In this paper , the thermal evolution of the lattice parameters was determined by high temperature X-ray Diffraction revealing negative thermal expansion coefficients and the optimal conditions to obtain a dense target in order to produce thin films by the Pulsed Laser Deposition (PLD) technique.
References
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Anisotropic Superexchange Interaction and Weak Ferromagnetism
TL;DR: In this paper, the Anderson theory of superexchange was extended to include spin-orbit coupling and the antisymmetric spin coupling suggested by Dzialoshinski from purely symmetry grounds and the symmetric pseudodipolar interaction were derived.
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A thermodynamic theory of “weak” ferromagnetism of antiferromagnetics
TL;DR: In this paper, a thermodynamic theory of weak ferromagnetism of α-Fe 2 O 3, MnCO 3 and CoCO 3 is developed on the basis of landau's theory of phase transitions of the second kind.
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Magnetic control of ferroelectric polarization
Tsuyoshi Kimura,Tsuyoshi Kimura,Takeshi Goto,Hiroshi Shintani,Kyoko Ishizaka,Taka-hisa Arima,Yoshinori Tokura +6 more
TL;DR: The discovery of ferroelectricity in a perovskite manganite, TbMnO3, where the effect of spin frustration causes sinusoidal antiferromagnetic ordering and gigantic magnetoelectric and magnetocapacitance effects are found.
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Multiferroic magnetoelectric composites: Historical perspective, status, and future directions
TL;DR: In this article, a review of mostly recent activities can be found, with a brief summary of the historical perspective of the multiferroic magnetoelectric composites since its appearance in 1972.
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Electric polarization reversal and memory in a multiferroic material induced by magnetic fields.
TL;DR: A striking interplay between ferroelectricity and magnetism in the multiferroic TbMn2O5 is reported, demonstrated by a highly reproducible electric polarization reversal and permanent polarization imprint that are both actuated by an applied magnetic field.