Програмне забезпечення, корисні поради…

Програмне забезпечення Отримання новітніх наукових результатів вимагає як певного теоретичного підґрунтя, так і володіння комп’ютерними технологіями. Останні мають кілька основних спрямувань. По-перше, це комп’ютерний експеримент. Значно дешевший натурного, він дозволяє аналізувати фізичні системи в широких інтервалах параметрів і отримувати дані, які дуже складно чи напряму неможливо визначити з практики. По-друге,…

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Намагніченість вузьких стрічок: ефекти кривини

A ribbon is a surface swept out by a line segment turning as it moves along a central curve. For narrow magnetic ribbons, for which the length of the line segment is much less than the length of the curve, the anisotropy induced by the magnetostatic interaction is biaxial, with…

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Magnonics and Magnonic Crystalls

When: Friday, May 10 at 12:20 Where: Faculty of Radio Physics, Electronics and Computer Systems What: Magnonics and Magnonic Crystalls Who: Anastasiia Korniienko Magnonics is the field of science referring to information transport and processing by spin waves. Magnons are the quanta of spin waves. They have advantages offering more…

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Curvature effects in AFM nanowiers and their perspectives in spintronics

When: Monday, February 27 at 12:00 Where: Bogolybov Institute of Theoretical Physics What: Curvature effects in AFM nanowiers and their perspectives in spintronics Who: Denis Kononenko Antiferromagnetic materials are of gread interest for theoretical and experimental spintronics due to their SHF properties. We will discuss modern achievements in spintronics of antiferromagnets.

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Магнетизм у викривлених геометріях

Extending planar two-dimensional structures into the three-dimensional space has become a general trend in multiple disciplines, including electronics, photonics, plasmonics and magnetics. This approach provides means to modify conventional or to launch novel functionalities by tailoring the geometry of an object, e.g. its local curvature. In a generic electronic system,…

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Керування рухом доменної стінки в магнітній спіралі за допомогою ефекта Рашби

Manipulation of the domain wall propagation in magnetic wires is a key practical task for a number of devices including racetrack memory and magnetic logic. Recently, curvilinear effects emerged as an efficient mean to impact substantially the statics and dynamics of magnetic textures. Here, we demonstrate that the curvilinear form of the exchange…

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Ефекти кривини і крученні в динаміці доменної стінки під впливом спінового струму

The domain wall motion along a helix-shaped nanowire is studied for the case of spin-current driving via the Zhang-Li mechanism. The analysis is based on the collective variable approach. Two effects are ascertained: (i) the curvature results in the appearance of the Walker limit for a uniaxial wire, and (ii)…

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Закріплення доменної стінки завдяки кривині

A local bend of a nanowire is a source of pinning potential for a transversal head-to-head (tail-to-tail) domain wall. Eigenfrequency of the domain wall free oscillations at the pinning potential and the effective friction are determined as functions of the curvature and domain wall width. The pinning potential originates from…

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