Giant planar Hall effect in epitaxialFe3O4thin films and its temperature dependence

2008 ◽  
Vol 78 (21) ◽  
Author(s):  
A. Fernández-Pacheco ◽  
J. M. De Teresa ◽  
J. Orna ◽  
L. Morellon ◽  
P. A. Algarabel ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Hall Effect ◽  
Planar Hall Effect

scholarly journals Planar Hall effect caused by the memory of antiferromagnetic domain walls in Mn3Ge

2020 ◽  
Vol 117 (22) ◽  
pp. 222403
Author(s):  
Liangcai Xu ◽  
Xiaokang Li ◽  
Linchao Ding ◽  
Kamran Behnia ◽  
Zengwei Zhu
Keyword(s):  
Hall Effect ◽  
Domain Walls ◽  
Planar Hall Effect

scholarly journals Observation of planar Hall effect in topological insulator—Bi2Te3

2021 ◽  
Vol 118 (24) ◽  
pp. 241901
Author(s):  
Archit Bhardwaj ◽  
Syam Prasad P. ◽  
Karthik V. Raman ◽  
Dhavala Suri
Keyword(s):  
Hall Effect ◽  
Topological Insulator ◽  
Planar Hall Effect

Two Orders of Magnitude Improvement in the Detection Limit of Droplet-Based Micro-Magnetofluidics with Planar Hall Effect Sensors

2021 ◽  
Vol 6 (1) ◽  
pp. 47
Author(s):  
Julian Schütt ◽  
Rico Illing ◽  
Oleksii Volkov ◽  
Tobias Kosub ◽  
Pablo Nicolás Granell ◽  
...  
Keyword(s):  
Detection Limit ◽  
Hall Effect ◽  
State Of The Art ◽  
Limit Of Detection ◽  
Research Field ◽  
High Throughput Analysis ◽  
Planar Hall Effect ◽  
Biologically Relevant ◽  
Sensing Platform ◽  
Order Of Magnitude

The detection, manipulation, and tracking of magnetic nanoparticles is of major importance in the fields of biology, biotechnology, and biomedical applications as labels as well as in drug delivery, (bio-)detection, and tissue engineering. In this regard, the trend goes towards improvements of existing state-of-the-art methodologies in the spirit of timesaving, high-throughput analysis at ultra-low volumes. Here, microfluidics offers vast advantages to address these requirements, as it deals with the control and manipulation of liquids in confined microchannels. This conjunction of microfluidics and magnetism, namely micro-magnetofluidics, is a dynamic research field, which requires novel sensor solutions to boost the detection limit of tiny quantities of magnetized objects. We present a sensing strategy relying on planar Hall effect (PHE) sensors in droplet-based micro-magnetofluidics for the detection of a multiphase liquid flow, i.e., superparamagnetic aqueous droplets in an oil carrier phase. The high resolution of the sensor allows the detection of nanoliter-sized superparamagnetic droplets with a concentration of 0.58 mg cm−3, even when they are only biased in a geomagnetic field. The limit of detection can be boosted another order of magnitude, reaching 0.04 mg cm−³ (1.4 million particles in a single 100 nL droplet) when a magnetic field of 5 mT is applied to bias the droplets. With this performance, our sensing platform outperforms the state-of-the-art solutions in droplet-based micro-magnetofluidics by a factor of 100. This allows us to detect ferrofluid droplets in clinically and biologically relevant concentrations, and even in lower concentrations, without the need of externally applied magnetic fields.

Measurements of Brownian relaxation of magnetic nanobeads using planar Hall effect bridge sensors

2013 ◽  
Vol 40 (1) ◽  
pp. 147-152 ◽  
Author(s):  
F.W. Østerberg ◽  
G. Rizzi ◽  
T. Zardán Gómez de la Torre ◽  
M. Strömberg ◽  
M. Strømme ◽  
...  
Keyword(s):  
Hall Effect ◽  
Planar Hall Effect ◽  
Magnetic Nanobeads
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