Near-room-temperature colossal magnetodielectricity and multiglass properties in partially disordered La2NiMnO6
Debraj Choudhury,Pranab K. Mandal,Roland Mathieu,Abhijit Hazarika,S. Rajan,A. Sundaresan,Umesh V. Waghmare,Ronny Knut,Olof Karis,Per Nordblad,D. D. Sarma,D. D. Sarma,D. D. Sarma +12 more
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This work establishes a unique way to obtain colossal magnetodielectricity, independent of any striction effects, by engineering the asymmetric hopping contribution to the dielectric constant via the tuning of the relative-spin orientations between neighboring magnetic ions in a transition-metal oxide system.Abstract:
We report magnetic, dielectric, and magnetodielectric responses of the pure monoclinic bulk phase of partially disordered La2NiMnO6, exhibiting a spectrum of unusual properties and establish that this compound is an intrinsically multiglass system with a large magnetodielectric coupling (8%-20%) over a wide range of temperatures (150-300 K). Specifically, our results establish a unique way to obtain colossal magnetodielectricity, independent of any striction effects, by engineering the asymmetric hopping contribution to the dielectric constant via the tuning of the relative-spin orientations between neighboring magnetic ions in a transition-metal oxide system. We discuss the role of antisite (Ni-Mn) disorder in emergence of these unusual properties.read more
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The extrinsic origin of the magnetodielectric effect in the double perovskite La2NiMnO6.
TL;DR: A systematic study on the magnetic field induced dielectrics properties, dc transport and dc bias effect on the dielectric permittivity has revealed the extrinsic origin of the MD effect in the bulk sample of La(2)NiMnO(6).
Journal ArticleDOI
First order magneto-structural phase transition and associated multi-functional properties in magnetic solids
TL;DR: It is shown that the first order magneto-structural phase transitions observed in various classes of magnetic solids are often accompanied by useful multi-functional properties, namely giant magneto -resistance, magnete-caloric effect and magneto'-striction.
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Spin glass behaviour and extrinsic origin of magnetodielectric effect in non-multiferroic La 2 NiMnO 6 nanoparticles
TL;DR: In this article, magnetization, dielectric and dc transport properties of La2NiMnO6 nanoparticles were reported, which indicated a metastable magnetic behavior with random ferromagnetic and antiferromagnetic interactions below 110 K.
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Critical Comparison of FAPbX3 and MAPbX3 (X = Br and Cl): How Do They Differ?
Sharada Govinda,Bhushan P. Kore,Diptikanta Swain,Akmal Hossain,Chandan De,Tayur N. Guru Row,D. D. Sarma,D. D. Sarma +7 more
TL;DR: In this paper, temperature-dependent dielectric measurements on formamidinium lead halide perovskites, FAPbCl3 and FAPbr3, compared to those of MAPbX3 and previously reported MAPbBr3, reveal the strongly suppressed temperature dependence of dielectrics in FA compounds in the temperature range of approximately 140-300 K.
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Dielectrics and Waves
TL;DR: Macroscopic approach complex permittivity and permaebility polarization and magnetization couloumb and dipole fields space-charge fields correlations between electric and magnetic phenomena Maxwell's field equations electromagnetic waves in unbounded space descriptions of dielectrics by various sets of parameters forces field energy and radiation polarized radiation dipole radiation boundary conditions Fresnel's equations reflection and refraction of plane waves by loss-free dielectric standing waves interference optics skin effect as discussed by the authors.