Topic
Magnetocapacitance
About: Magnetocapacitance is a research topic. Over the lifetime, 497 publications have been published within this topic receiving 23846 citations.
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TL;DR: The dielectric constant of the Kagome staircase-like Co3V2O8 polycrystalline compound has been measured as a function of temperature and magnetic field up to 14 T.
Abstract: The dielectric constant of the Kagome staircase-like Co3V2O8 polycrystalline compound has been measured as a function of temperature and magnetic field up to 14 T. It is found that the application of an external magnetic field suppresses the anomaly for the dielectric constant beyond 6.1 K. Furthermore, its magnetic field dependence reveals a negative magnetocapacitance which is proportional to the magnetic susceptibility, suggesting a common magnetostrictive origin for the magnetic field dependence of the two quantities. This result is very different from that obtained from the isostructural compound Ni3V2O8 that presents a peak in the dielectric constant at the incommensurate magnetic phase transition coupled to a sign change of the magnetocapacitance.
23 citations
TL;DR: Cr[(H(3)N-(CH(2))(2)-PO(3))(Cl)(H(2)O)] represents a rare example of a polar organic-inorganic hybrid material that exhibits a canted antiferromagnetic order below T(N)=5.5 K as mentioned in this paper.
Abstract: Cr[(H(3)N-(CH(2))(2)-PO(3))(Cl)(H(2)O)] represents a rare example of a polar organic-inorganic hybrid material that exhibits a canted antiferromagnetic order below T(N)=5.5 K. The unusual coexistence of a polar crystal structure and magnetic order triggered our investigation of the magnetodielectric coupling. The coupling is evidenced by an anomaly in the temperature dependence of the dielectric constant epsilon below the Neel temperature. The magnetocapacitance is enhanced by one order of magnitude below T(N). The main characteristics of the magnetodielectic response are interpreted by Landau theoretical coupling terms.
23 citations
TL;DR: In this paper, gallium orthoferrite (GFO) and Zn doped GaFeO3 (Ga0.95Zn0.10FeO 3, GZFO2) are prepared by sol-gel method.
Abstract: Nanocrystalline samples of gallium orthoferrite (GaFeO3, GFO) and Zn doped GaFeO3 (Ga0.95Zn0.05FeO3, GZFO1 and Ga0.90Zn0.10FeO3, GZFO2) are prepared by sol–gel method. Crystallographic phase of each sample has been confirmed by analyzing the X-ray diffractogram using FULLPROF program and all the samples are grown in the distorted perovskite type structure. Magnetic measurements of all the samples are carried out in the temperature range of 300–4 K. Dielectric and ferroelectric measurements of the samples are also carried out at room temperature. Interestingly, the magnetization and electric polarization of the doped samples are enhanced compared to those of the pristine sample of GFO. The dielectric constant measured in presence and absence of a magnetic field confirmed that all the samples (GFO, GZFO1, and GZFO2) are type-II multiferroics and the magnetocapacitance is enhanced in the doped samples. The simultaneous enhancement of magnetization, polarization and magneto-capacitance co-efficient of the doped samples compared to that of GFO will be quite interesting for applications in electronic and memory devices.
23 citations
TL;DR: High-field magnetoresistance behavior explainable in terms of magnetic tuning of the critical density of Si is shown and magnetocapacitance results depend on field-induced changes in both ${N}_{c}$ and $\ensuremath{
u}$.
Abstract: Barely insulating and barely metallic Si:As samples have been studied in the temperature range 4.2 K to 50 mK. Metallic samples show a new high-field magnetoresistance behavior explainable in terms of magnetic tuning of the critical density ${N}_{c}$. Insulating samples at fixed fields show Mott variable-range-hopping behavior and the increase of characteristic temperature ${T}_{0}(N,H)$ with $H$ results primarily from magnetic tuning of the localization-length exponent $\ensuremath{
u}$. Magnetocapacitance results depend on field-induced changes in both ${N}_{c}$ and $\ensuremath{
u}$.
23 citations
TL;DR: In this paper, multiferroic composite nanoparticles of CoFe2O4 and perovskite Bi 0.85La 0.15FeO3 were prepared by a two-step wet chemical procedure, combining co-precipitation and sol-gel techniques.
23 citations