Giant dielectric permittivity and magneto-capacitance effects in low doped manganites

Мамин, Р. Ф.; Kabanov, V. V.

doi:10.1088/1367-2630/16/7/073011

Cited by 6 publications

(2 citation statements)

References 38 publications

(85 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The magnetocapacitance behavior could be understood by the effect of magnetic field on the properties of the charge separation structure. The magnetic field decreases the magnetic ordering and the charge ordering 39,40 and leads to change the magnetocapacitance 41 . The increasing magnetic field led to the enhanced negative magnetocapacitance >90% is noticed in a field of 1 T at (2 kHz) at room temperature has shown in Fig.…”

Section: Resultsmentioning

confidence: 89%

Complex magnetic structure and magnetocapacitance response in a non-oxide NiF2 system

Arumugam

Sivaprakash

Dixit

et al. 2019

Sci Rep

View full text Add to dashboard Cite

We report here on the complex magnetic structure and magnetocapacitance in NiF 2 , a non-oxide multifunctional system. It undergoes an anti-ferromagnetic transition near 68.5 K, superimposed with canted Ni spin driven weak ferromagnetic ordering, followed by a metastable ferromagnetic phase at or below 10 K. Our density functional calculations account for the complex magnetic structure of NiF 2 deduced from the temperature and the field dependent measurements. Near room temperature, NiF 2 exhibits a relatively large dielectric response reaching >10 3 with a low dielectric loss of <0.5 at frequencies >20 Hz. This is attributed to the intrinsic grain contribution in contrast to the grain boundary contribution in most of the known dielectric materials. The response time is 10 μs or more at 280 K. The activation energy for such temperature dependent relaxation is ~500 meV and is the main source for grain contribution. Further, a large negative magneto capacitance >90% is noticed in 1 T magnetic field. We propose that our findings provide a new non-oxide multifunctional NiF 2 , useful for dielectric applications.

show abstract

Section: Resultsmentioning

confidence: 89%

Complex magnetic structure and magnetocapacitance response in a non-oxide NiF2 system

Arumugam

Sivaprakash

Dixit

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Then with lowering of the temperature the transition to inhomogeneous phase II takes place. And only then at 140K the system undergoes the transition to homogeneous state 4,27,28 . This sequence of the phase transitions is very similar to that discussed in our paper.…”

Section: Resultsmentioning

confidence: 99%

Phase separation and second-order phase transition in the phenomenological model for a Coulomb-frustrated two-dimensional system

2018

View full text Add to dashboard Cite

We have considered the model of the phase transition of the second order for the Coulomb frustrated 2D charged system. The coupling of the order parameter with the charge was considered as the local temperature. We have found that in such system, an appearance of the phase-separated state is possible. By numerical simulation, we have obtained different types ("stripes", "rings", "snakes") of phase-separated states and determined the parameter ranges for these states. Thus the system undergoes a series of phase transitions when the temperature decreases. First, the system moves from the homogeneous state with a zero order parameter to the phase-separated state with two phases in one of which the order parameter is zero and, in the other, it is nonzero (τ > 0). Then a first-order transition occurs to another phase-separated state, in which both phases have different and nonzero values of the order parameter (for τ < 0). And only a further decrease of temperature leads to a transition to a homogeneous ordered state.

show abstract

Dielectric, Impedance, Magnetic and Magnetocapacitance Investigations in ferrite–manganite nanocomposites for Hydroelectric Cell applications

Chitralekha,

Gaurav,

Kotnala

et al. 2024

emergent mater.

View full text Add to dashboard Cite

Giant dielectric permittivity and magneto-capacitance effects in low doped manganites

Cited by 6 publications

References 38 publications

Complex magnetic structure and magnetocapacitance response in a non-oxide NiF2 system

Complex magnetic structure and magnetocapacitance response in a non-oxide NiF2 system

Phase separation and second-order phase transition in the phenomenological model for a Coulomb-frustrated two-dimensional system

Dielectric, Impedance, Magnetic and Magnetocapacitance Investigations in ferrite–manganite nanocomposites for Hydroelectric Cell applications

Contact Info

Product

Resources

About