magnetic applications
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Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 201
Author(s):  
Lotfi Bessais

This review discusses the properties of candidate compounds for semi-hard and hard magnetic applications. Their general formula is R1−sT5+2s with R = rare earth, T = transition metal and 0≤s≤0.5 and among them, the focus will be on the ThMn12- and Th2Zn17-type structures. Not only will the influence of the structure on the magnetic properties be shown, but also the influence of various R and T elements on the intrinsic magnetic properties will be discussed (R = Y, Pr, Nd, Sm, Gd, … and T = Fe, Co, Si, Al, Ga, Mo, Zr, Cr, Ti, V, …). The influence of the microstructure on the extrinsic magnetic properties of these R–T based intermetallic nanomaterials, prepared by high energy ball milling followed by short annealing, will be also be shown. In addition, the electronic structure studied by DFT will be presented and compared to the results of experimental magnetic measurements as well as the hyperfine parameter determined by Mössbauer spectrometry.


2021 ◽  
Vol 9 ◽  
Author(s):  
Mengjia Jiang ◽  
Chun Zhen ◽  
Shuyu Li ◽  
Xiaotao Zhang ◽  
Wenping Hu

Cocrystal engineering is an advanced supramolecular strategy that has attracted a lot of research interest. Many studies on cocrystals in various application fields have been reported, with a particular focus on the optoelectronics field. However, few articles have combined and summarized the electronic and magnetic properties of cocrystals. In this review, we first introduce the growth methods that serve as the basis for realizing the different properties of cocrystals. Thereafter, we present an overview of cocrystal applications in electronic and magnetic fields. Some functional devices based on cocrystals are also introduced. We hope that this review will provide researchers with a more comprehensive understanding of the latest progress and prospects of cocrystals in electronic and magnetic fields.


2021 ◽  
pp. 131869
Author(s):  
G. Vimala ◽  
Perumal Rajakumar ◽  
P. Vinothkumar ◽  
Manoj Mohapatra ◽  
Perumal Prabhakaran ◽  
...  

2021 ◽  
pp. 102291
Author(s):  
Shihao Li ◽  
Kwang Boon Lau ◽  
Delvin Wuu ◽  
Fengxia Wei ◽  
Ming Lin ◽  
...  

Author(s):  
Tuomo Nyyssönen ◽  
Bevis Hutchinson ◽  
Arvid Broddefalk

2021 ◽  
Vol 12 ◽  
pp. 744-755
Author(s):  
Ke Xu ◽  
Shuang Xu ◽  
Fanan Wei

In recent years, magnetic micro- and nanorobots have been developed and extensively used in many fields. Actuated by magnetic fields, micro- and nanorobots can achieve controllable motion, targeted transportation of cargo, and energy transmission. The proper use of magnetic fields is essential for the further research and development of micro- and nanorobotics. In this article, recent progress in magnetic applications in the field of micro- and nanorobots is reviewed. First, the achievements of manufacturing micro- and nanorobots by incorporating different magnetic nanoparticles, such as diamagnetic, paramagnetic, and ferromagnetic materials, are discussed in detail, highlighting the importance of a rational use of magnetic materials. Then the innovative breakthroughs of using different magnetoelectric devices and magnetic drive structures to improve the micro- and nanorobots are reviewed. Finally, based on the biofriendliness and the precise and stable performance of magnetic micro- and nanorobots in microbial environments, some future challenges are outlined, and the prospects of magnetic applications for micro- and nanorobots are presented.


Optik ◽  
2021 ◽  
pp. 167502
Author(s):  
Zohra Nazir Kayani ◽  
Zainab Bashir ◽  
Munazza Mohsin ◽  
Saira Riaz ◽  
Shahzad Naseem

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