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 Antisymmetric linear magnetoresistance and the planar Hall effect

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yishu Wang ◽  
Patrick A. Lee ◽  
D. M. Silevitch ◽  
F. Gomez ◽  
S. E. Cooper ◽  
...  
Keyword(s):  
Hall Effect ◽  
Domain Walls ◽  
Electrical Current ◽  
Anomalous Hall Effect ◽  
Electron Velocity ◽  
Planar Hall Effect ◽  
Ferromagnetic Domain ◽  
Intrinsic Coercivity ◽  
Spin Dependent Scattering ◽  
Ordered State

AbstractThe phenomena of antisymmetric magnetoresistance and the planar Hall effect are deeply entwined with ferromagnetism. The intrinsic magnetization of the ordered state permits these unusual and rarely observed manifestations of Onsager’s theorem when time reversal symmetry is broken at zero applied field. Here we study two classes of ferromagnetic materials, rare-earth magnets with high intrinsic coercivity and antiferromagnetic pyrochlores with strongly-pinned ferromagnetic domain walls, which both exhibit antisymmetric magnetoresistive behavior. By mapping out the peculiar angular variation of the antisymmetric galvanomagnetic response with respect to the relative alignments of the magnetization, magnetic field, and electrical current, we experimentally distinguish two distinct underlying microscopic mechanisms: namely, spin-dependent scattering of a Zeeman-shifted Fermi surface and anomalous electron velocities. Our work demonstrates that the anomalous electron velocity physics typically associated with the anomalous Hall effect is prevalent beyond the ρxy(Hz) channel, and should be understood as a part of the general galvanomagnetic behavior.

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

scholarly journals Giant Planar Hall Effect in Epitaxial (Ga,Mn)As Devices

2003 ◽  
Vol 90 (10) ◽  
Author(s):  
H. X. Tang ◽  
R. K. Kawakami ◽  
D. D. Awschalom ◽  
M. L. Roukes
Keyword(s):  
Hall Effect ◽  
Planar Hall Effect

scholarly journals Chiral Anomaly as the Origin of the Planar Hall Effect in Weyl Semimetals

2017 ◽  
Vol 119 (17) ◽  
Author(s):  
S. Nandy ◽  
Girish Sharma ◽  
A. Taraphder ◽  
Sumanta Tewari
Keyword(s):  
Hall Effect ◽  
Chiral Anomaly ◽  
Planar Hall Effect ◽  
Weyl Semimetals

Magnetization reversal in(Ga,Mn)As∕MnOexchange-biased structures: Investigation by planar Hall effect

2007 ◽  
Vol 75 (1) ◽  
Author(s):  
Z. Ge ◽  
W. L. Lim ◽  
S. Shen ◽  
Y. Y. Zhou ◽  
X. Liu ◽  
...  
Keyword(s):  
Hall Effect ◽  
Magnetization Reversal ◽  
Planar Hall Effect
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