NONUNIFORM NONLINEAR OSCILLATIONS OF A DOMAIN WALL IN UNIAXIAL FERROMAGNET

The nonlinear small amplitude excitations of a domain wall (DW) in the ferromagnet with high uniaxial anisotropy are investigated using reduced magnetodynamic equations. The “life-time” of soliton-like oscillations of DW in the nondissipative media is defined. The conditions of direct and parametric stabilization of self-localized DW oscillations by alternating magnetic fields are analyzed in the presence of dissipation.

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SCALE MODEL EXPERIMENTS IN ELECTROMAGNETIC METHODS OF GEOPHYSICAL EXPLORATION

Canadian Journal of Physics ◽

10.1139/p51-033 ◽

1951 ◽

Vol 29 (4) ◽

pp. 285-293 ◽

Cited By ~ 3

Author(s):

A. R. Clark ◽

A. G. Mungal

Keyword(s):

Magnetic Fields ◽

Small Amplitude ◽

Scale Model ◽

Model Experiments ◽

Geophysical Exploration ◽

Electromagnetic Methods ◽

Conducting Bodies ◽

Alternating Magnetic Fields

A method of accurately measuring the phase as well as the amplitude of alternating magnetic fields of small amplitude has been devised and applied to the investigation of the response of conducting bodies placed in an electromagnetic field.The results have indicated how the position, dimensions, and dip of buried conductors may be evaluated.

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Measuring Magnetic Permeability of Monolithic Annular Measures in Alternating Magnetic Fields

Russian Journal of Nondestructive Testing ◽

10.1134/s1061830919110093 ◽

2019 ◽

Vol 55 (11) ◽

pp. 851-857 ◽

Cited By ~ 1

Author(s):

V. A. Syas’ko ◽

S. S. Golubev ◽

Ya. G. Smorodinskii ◽

P. V. Solomenchuk ◽

E. B. Bryukhovetskaya

Keyword(s):

Magnetic Fields ◽

Magnetic Permeability ◽

Alternating Magnetic Fields

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Inactivation of Bacteria Using Bioactive Nanoparticles and Alternating Magnetic Fields

Nanomaterials ◽

10.3390/nano11020342 ◽

2021 ◽

Vol 11 (2) ◽

pp. 342

Author(s):

Vitalij Novickij ◽

Ramunė Stanevičienė ◽

Rūta Gruškienė ◽

Kazimieras Badokas ◽

Juliana Lukša ◽

...

Keyword(s):

Magnetic Fields ◽

Foodborne Pathogens ◽

Morphological Changes ◽

Foodborne Pathogen ◽

Cellular Damage ◽

Suitable Model ◽

Log Reduction ◽

Invasive Infections ◽

Alternating Magnetic Fields ◽

Inactivation Of Bacteria

Foodborne pathogens are frequently associated with risks and outbreaks of many diseases; therefore, food safety and processing remain a priority to control and minimize these risks. In this work, nisin-loaded magnetic nanoparticles were used and activated by alternating 10 and 125 mT (peak to peak) magnetic fields (AMFs) for biocontrol of bacteria Listeria innocua, a suitable model to study the inactivation of common foodborne pathogen L. monocytogenes. It was shown that L. innocua features high resistance to nisin-based bioactive nanoparticles, however, application of AMFs (15 and 30 min exposure) significantly potentiates the treatment resulting in considerable log reduction of viable cells. The morphological changes and the resulting cellular damage, which was induced by the synergistic treatment, was confirmed using scanning electron microscopy. The thermal effects were also estimated in the study. The results are useful for the development of new methods for treatment of the drug-resistant foodborne pathogens to minimize the risks of invasive infections. The proposed methodology is a contactless alternative to the currently established pulsed-electric field-based treatment in food processing.

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Giant conductivity of mobile non-oxide domain walls

Nature Communications ◽

10.1038/s41467-021-24160-2 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

S. Ghara ◽

K. Geirhos ◽

L. Kuerten ◽

P. Lunkenheimer ◽

V. Tsurkan ◽

...

Keyword(s):

Magnetic Fields ◽

Domain Wall ◽

Domain Walls ◽

Building Blocks ◽

External Fields ◽

Tail Domain ◽

Oxide Electronics ◽

Domain Wall Mobility ◽

Conductance Changes ◽

Wall Mobility

AbstractAtomically sharp domain walls in ferroelectrics are considered as an ideal platform to realize easy-to-reconfigure nanoelectronic building blocks, created, manipulated and erased by external fields. However, conductive domain walls have been exclusively observed in oxides, where domain wall mobility and conductivity is largely influenced by stoichiometry and defects. Here, we report on giant conductivity of domain walls in the non-oxide ferroelectric GaV4S8. We observe conductive domain walls forming in zig-zagging structures, that are composed of head-to-head and tail-to-tail domain wall segments alternating on the nanoscale. Remarkably, both types of segments possess high conductivity, unimaginable in oxide ferroelectrics. These effectively 2D domain walls, dominating the 3D conductance, can be mobilized by magnetic fields, triggering abrupt conductance changes as large as eight orders of magnitude. These unique properties demonstrate that non-oxide ferroelectrics can be the source of novel phenomena beyond the realm of oxide electronics.

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Long-lived Néel states in antiferromagnetic quantum spin chains with strong uniaxial anisotropy for atomic-scale antiferromagnetic spintronics

RSC Advances ◽

10.1039/c5ra19582a ◽

2015 ◽

Vol 5 (129) ◽

pp. 106333-106338 ◽

Cited By ~ 1

Author(s):

Jun Li ◽

Bang-Gui Liu

Keyword(s):

Uniaxial Anisotropy ◽

Life Time ◽

Quantum Spin ◽

Spin Chains ◽

Atomic Scale ◽

Quantum Spin Chains ◽

Long Life

We achieve a powerful life-time expression of the Neel states for arbitrary parameters and show that for famous Fe adatom chains on Cu2N surface, 14 or 16 Fe adatoms are enough to obtain a long life-time for Neel state storage of information.

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