Influence of transverse fields on domain wall pinning in ferromagnetic nanostripes

Glathe, S.; Hübner, Uwe; Mattheis, R.; Seidel, P.

doi:10.1063/1.4739282

Cited by 7 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Benefiting from the current micro- and nanofabrication techniques, each GMR biosensor is typically in the size of tens to hundreds of micrometers. As shown in Figure , theoretically, GMR biosensors could be scaled to more than 1 million sensors/cm 2 . , To date, different GMR biosensor patterns have been reported, for example, a stripe shape , (Figure A), a spiral shape , (not shown), a meander shape (Figure B), large-area (Figure C), and a “U” shape (Figure D). It is reported that for GMR-based bioassays, the MNP labels landing at the sensor edges cause larger signal differences compared to the same MNP labels landing on top of the sensor .…”

Section: Gmr Biosensor Designsmentioning

confidence: 99%

Giant Magnetoresistance Biosensors in Biomedical Applications

Tonini

Liang

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The giant magnetoresistance (GMR) effect has seen flourishing development from theory to application in the last three decades since its discovery in 1988. Nowadays, commercial devices based on the GMR effect, such as hard-disk drives, biosensors, magnetic field sensors, microelectromechanical systems (MEMS), etc., are available in the market, by virtue of the advances in state-of-the-art thin-film deposition and micro- and nanofabrication techniques. Different types of GMR biosensor arrays with superior sensitivity and robustness are available at a lower cost for a wide variety of biomedical applications. In this paper, we review the recent advances in GMR-based biomedical applications including disease diagnosis, genotyping, food and drug regulation, brain and cardiac mapping, etc. The GMR magnetic multilayer structure, spin valve, and magnetic granular structure, as well as fundamental theories of the GMR effect, are introduced at first. The emerging topic of flexible GMR for wearable biosensing is also included. Different GMR pattern designs, sensor surface functionalization, bioassay strategies, and on-chip accessories for improved GMR performances are reviewed. It is foreseen that combined with the state-of-the-art complementary metal-oxide-semiconductor (CMOS) electronics, GMR biosensors hold great promise in biomedicine, particularly for point-of-care (POC) disease diagnosis and wearable devices for real-time health monitoring.

show abstract

Section: Gmr Biosensor Designsmentioning

confidence: 99%

Giant Magnetoresistance Biosensors in Biomedical Applications

Tonini

Liang

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…[21][22][23][24] The ability of the transverse field to change the domain wall speed also impacts the ability of a notch to trap a domain wall, in that fast moving walls can pass a notch that is capable of trapping a slower moving wall. [25][26][27] When the transverse field component is applied parallel to the direction of the magnetic moments within the domain wall, it will speed up, and if applied anti-parallel, it will slow down. 22 Similarly in Fig.…”

mentioning

confidence: 99%

Application of local transverse fields for domain wall control in ferromagnetic nanowire arrays

Kunz

Vogeler-Wunsch

2012

Appl. Phys. Lett.

View full text Add to dashboard Cite

“…In general, it has been shown that the speed of a current-driven DW can be increased by either improving the driving force from the current or by enhancing the DW fidelity (i.e. its rigidity) [52][53][54][55][56][57][58][59][60][61], which is a measure of how strong the DW can resist a structural change upon the application of external stimuli. configuration for various strength of external transverse field.…”

Section: Magnetic Domain Wallsmentioning

confidence: 99%

Dynamics of current-driven magnetic domain walls and skyrmions

Purnama¹

View full text Add to dashboard Cite

The dynamics of current-driven magnetic domain walls and skyrmions are both topics of high interest in the magnetism community due to the possibility of employing them in novel high-density non-volatile memory devices. One such device is the well-known racetrack memory, where the information is stored in a ferromagnetic nanowire as compared to the conventional harddisk memory, while the operation is mediated via the injection of current to the nanowire. In a domain wall-based racetrack memory, the information is represented by magnatic domains that are separated by domain walls, while in a skyrmionbased racetrack memory, the information is represented by the presence of the skyrmions themselves. However, to be able to realize such devices, it is very important to have a complete understanding of both the domain wall and dynamics under the application of current. At present, the investigation of domain wall dynamics is mainly focused on finding additional driving mechanisms to improve its mobility. In the case of skyrmion dynamics, the research is still in the very early stage, although it has been shown that it is possible to inject individual skyrmions individually which brings skyrmion-based devices closer to realization. In this thesis, the dynamics of current driven magnetic domain walls and skyrmions in various nanostructures are investigated. We show by micromagnetic simulations that it is possible to drive multiple domain walls in a multi-nanowire system by just applying current to one of the nanowires. The phenomenon is made possible due to the magnetostatic coupling between the domain walls. When materials with in-plane anisotropy are considered, the coupling is realized when the nanowires are placed parallel to each other, and the technique can be further utilized to drive several domain walls in the current-free nanowire. When materials with strong perpendicular magnetization anisotropy are used, the phenomenon is realized by stacking the nanowires vertically, and the coupling between the

show abstract

Influence of transverse fields on domain wall pinning in ferromagnetic nanostripes

Cited by 7 publications

References 32 publications

Giant Magnetoresistance Biosensors in Biomedical Applications

Giant Magnetoresistance Biosensors in Biomedical Applications

Application of local transverse fields for domain wall control in ferromagnetic nanowire arrays

Dynamics of current-driven magnetic domain walls and skyrmions

Contact Info

Product

Resources

About