室温单元有机多重铁器与大磁电合:流浪磁场收获的熟练方法
Deepak1, Dalip Saini2, Sudip Naskar2
1Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81, SAS Nagar, Punjab, India.
Small (Weinheim an der Bergstrasse, Germany)
|September 6, 2024
概括
研究人员开发了一种新型的单元有机多铁材料. 这种灵活的,可溶液加工的材料表现出有机物中最高的磁电合,使磁场能有效地收集能量.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 多重铁路公司 (Multiferroics)
背景情况:
- 磁电材料从磁场产生电力,这对于电子应用至关重要.
- 有机磁电材料提供了诸如灵活性,低重量和解决方案可加工性等优势.
- 现有的有机磁电材料有限,阻碍了技术发展.
研究的目的:
- 设计和合成一种新的单元有机多铁材料.
- 在可溶液加工的柔性有机材料中实现高磁电合.
- 探索利用有机电子产品收集环境磁场的潜力.
主要方法:
- 设计了一种超分子支架,集成了电极二极体和磁旋.
- 在非极性溶剂中利用自组装,形成纳米纤维有机凝网络.
- 通过其磁电性质来表征从有机凝中衍生出来的施色凝.
主要成果:
- 有机色凝证明了有机材料的磁电合系数 (αME ≈ 216 mV Oe−1 cm−1) 的创纪录.
- 该材料在室温下表现出铁电性 (Tc ≈ 46 °C) 和偏磁性行为.
- 实现了磁电合,超过了许多复合型压电聚合物/无机磁体系统的磁电合.
结论:
- 一种新型的单成分有机多铁性材料已经成功开发出来.
- 这种材料为灵活,可穿戴的电子产品和高效的磁能收集提供了一个有前途的平台.
- 这些发现为利用环境中浪费的漫游磁场开辟了新的途径.
相关概念视频
01:31Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
01:30Paramagnetism
2.5K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
2.5K
01:18Magnetic Field Due to Two Straight Wires
2.4K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
2.4K
01:28Types Of Superconductors
954
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
954
01:28Magnetic Field Due To A Thin Straight Wire
4.8K
Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
4.8K
01:16Magnetic Field Of A Current Loop
4.5K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
4.5K