☆ 4.6 Article

Effect of Nb doping on epsilon negative behaviour of Sr2MnO4

JOURNAL OF MATERIALS SCIENCE (2022)

Related references

Note: Only part of the references are listed.

Article Materials Science, Ceramics

Temperature dependent negative permittivity in solid solutions Sr2Mn1-xSnxO4 (x=0, 0.3, 0.5)

Gurudeo Nirala et al.

Summary: Several compositions of Sr2Mn1-xSnxO4 system were synthesized using solid-state ceramic method in air. A change in the sign of the permittivity above a specific temperature was observed at all frequencies, and it was found that this negative permittivity was caused by plasma oscillations of thermally excited free charge carriers. XPS analysis confirmed mixed-valence states of Mn (Mn4+ and Mn3+) and Sn (Sn4+ and Sn2+) ions, while UV-vis.-IR spectroscopy results indicated the generation of defect states in the forbidden bandgap region of Sr2MnO4 on Sn substitution at Mn site. These synthesized samples show promise as metamaterials for applications in the radio frequency (10 Hz-2 MHz) region due to their high-temperature plasmonic behavior.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2022)

Add to Collection

Article Materials Science, Ceramics

Effect of direct-current biasing on the adjustable radio-frequency negative permittivity characteristics of Bi2SiO5/multiwall carbon nanotube metacomposites

Toton Haldar et al.

Summary: Metacomposites of Bi2SiO5 (BSO) and multiwall carbon nanotubes (MWCNT) with adjustable negative permittivity were prepared using a hydrothermal method. The interconnected MWCNT formed a three-dimensional conductive network in the metacomposites, leading to the tunable negative permittivity attributed to the low-frequency plasmon resonance of free Drude carriers. The study also investigated the impact of direct current biasing voltage on the negative permittivity characteristics in the radio frequency region, providing a novel strategy for adjusting the negative permittivity value for potential applications in sensors.

CERAMICS INTERNATIONAL (2021)

Add to Collection

Article Materials Science, Multidisciplinary

Doped ceramics of indium oxides for negative permittivity materials in MHz-kHz frequency regions

Guohua Fan et al.

Summary: The study investigated the negative permittivity in indium tin oxide (ITO) ceramics, revealing that the negative permittivity is mainly caused by plasma oscillations of free carriers, while the dielectric loss is mainly attributed to conduction loss. The magnitude and frequency dispersion of negative permittivity are mainly determined by carrier concentration, and the mechanism has been preliminarily understood from the perspective of carriers.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2021)

Add to Collection

Article Physics, Multidisciplinary

Thermally activated polaron tunnelling conduction mechanism in Sr2MnO4 synthesized by quenching in ambient atmosphere

Gurudeo Nirala et al.

Summary: The oxide Sr2MnO4 was synthesized using the solid-state reaction technique, and its purity and structure were verified through FTIR and XRD analysis. The band gap was calculated to be 1.15 eV, and XPS analysis revealed the presence of Mn3+ and Mn4+ valence states. AC electrical conductivity measurements at different temperatures and frequencies showed a change in the conduction mechanism.

PHYSICA SCRIPTA (2021)

Add to Collection

Article Chemistry, Multidisciplinary

2D/2D atomic double-layer WS2/Nb2O5 shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H2 evolution

Bo Lin et al.

Summary: A new DLWS/Nb2O5 photocatalyst with a unique 2D/2D shell/core interface has been designed for achieving high-efficiency charge transfer, leading to a significantly increased photocatalytic H2 evolution rate.

CHINESE CHEMICAL LETTERS (2021)

Add to Collection

Article Materials Science, Composites

Percolated cermets of nickel/yttrium iron garnet for double negative metacomposites

Guohua Fan et al.

Summary: The study found that percolative nickel/yttrium iron garnet cermets exhibit negative permittivity and negative permeability, showing potential for electromagnetic shielding and cloaking applications.

COMPOSITES COMMUNICATIONS (2021)

Add to Collection

Article Chemistry, Physical

Effect of Fe and Co doping on structural and electrical properties of La0.5Sr1.5MnO4 layered-structure and the corresponding La0.5Sr0.5MnO3 perovskite

M. Mootabian et al.

Summary: Through comparing the structural and electrical properties of La0.5Sr1.5Mn0.5T0.5O4 with La0.5Sr0.5Mn0.5T0.5O3 manganites, it was found that La0.5Sr1.5Mn0.5T0.5O4 has larger grain size and lower electrical conductivity due to the difference in their layered and perovskite structures.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

Add to Collection

Article Materials Science, Ceramics

Negative permittivity in titanium nitride-alumina composite for functionalized structural ceramics

Guohua Fan et al.

JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2020)

Add to Collection

Article Materials Science, Composites

Permittivity transition from positive to negative in acrylic polyurethane-aluminum composites

Zhongyang Wang et al.

COMPOSITES SCIENCE AND TECHNOLOGY (2020)

Add to Collection

Article Materials Science, Ceramics

Low-loss and temperature-stable negative permittivity in La0.5Sr0.5MnO3 ceramics

Zhongyang Wang et al.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2020)

Add to Collection

Review Materials Science, Ceramics

Ruddlesden-Popper phase A2BO4 oxides: Recent studies on structure, electrical, dielectric, and optical properties

Gurudeo Nirala et al.

JOURNAL OF ADVANCED CERAMICS (2020)

Add to Collection

Article Materials Science, Composites

Tunable negative permittivity in nano-carbon coated magnetic microwire polymer metacomposites

Diana Estevez et al.

COMPOSITES SCIENCE AND TECHNOLOGY (2019)

Add to Collection

Article Physics, Condensed Matter

Bandgap Engineering and Signature of Ferromagnetism in Ti1-xMnxO2 Diluted Magnetic Semiconductor Nanoparticles: A Valence Band Study

Brijmohan Prajapati et al.

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS (2019)

Add to Collection

Article Multidisciplinary Sciences

Targeted Double Negative Properties in Silver/Silica Random Metamaterials by Precise Control of Microstructures

Peitao Xie et al.

RESEARCH (2019)

Add to Collection

Article Materials Science, Multidisciplinary

Generation mechanism of negative dielectric properties of nano-Fe3O4/PANI composites

Xiuchao Yao et al.

MATERIALS CHEMISTRY AND PHYSICS (2018)

Add to Collection

Article Materials Science, Multidisciplinary

Tunable electromagnetic shielding properties of conductive poly(vinylidene fluoride)/Ni chain composite films with negative permittivity

Biao Zhao et al.

JOURNAL OF MATERIALS CHEMISTRY C (2017)

Add to Collection

Article Nanoscience & Nanotechnology

Bilayer Polymer Metacomposites Containing Negative Permittivity Layer for New High-k Materials

Jing Wang et al.

ACS APPLIED MATERIALS & INTERFACES (2017)

Add to Collection

Article Nanoscience & Nanotechnology

Negative Capacitance in BaTiO3/BiFeO3 Bilayer Capacitors

Ya-Fei Hou et al.

ACS APPLIED MATERIALS & INTERFACES (2016)

Add to Collection

Article Chemistry, Physical

Generation Mechanism of Negative Dielectric Properties of Metallic Oxide Crystals/Polyaniline Composites

Xiuchao Yao et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2016)

Add to Collection

Article Materials Science, Multidisciplinary

Acidified multi-wall carbon nanotubes/polyaniline composites with high negative permittivity

Xiuchao Yao et al.

ORGANIC ELECTRONICS (2016)

Add to Collection

Article Materials Science, Multidisciplinary

Nano-Al2O3/PANI composites with high negative permittivity

Xiuchao Yao et al.

ORGANIC ELECTRONICS (2016)

Add to Collection

Article Multidisciplinary Sciences

Nanoarchitectured Nb2O5 hollow, Nb2O5@carbon and NbO2@carbon Core-Shell Microspheres for Ultrahigh-Rate Intercalation Pseudocapacitors

Lingping Kong et al.

SCIENTIFIC REPORTS (2016)

Add to Collection

Article Chemistry, Physical

Perovskite (La,Sr)MnO3 with tunable electrical properties by the Sr-doping effect

Ke-lan Yan et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2015)

Add to Collection

Article Physics, Applied

Low frequency plasmonic state and negative permittivity spectra of coagulated Cu granular composite materials in the percolation threshold

Takanori Tsutaoka et al.

APPLIED PHYSICS LETTERS (2013)

Add to Collection

Article Physics, Applied

Magnetically tunable double-negative material composed of ferrite-dielectric and metallic mesh

Guanghua He et al.

JOURNAL OF APPLIED PHYSICS (2010)

Add to Collection

Article Chemistry, Multidisciplinary

Single Negative Metamaterials in Unstructured Polymer Nanocomposites Toward Selectable and Controllable Negative Permittivity

Bin Li et al.

ADVANCED MATERIALS (2009)

Add to Collection

Review Materials Science, Multidisciplinary

Mie resonance-based dielectric metamaterials

Qian Zhao et al.

MATERIALS TODAY (2009)

Add to Collection

Article Engineering, Electrical & Electronic

An Idea for Thin Subwavelength Cavity Resonators Using Metamaterials With Negative Permittivity and Permeability

Nader Engheta

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS (2002)

Add to Collection

© Peeref 2019-2024. All rights reserved.